The Andromeda Galaxy also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way.

Taken with a TMB92L, Hutech-modified Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 50 240-second light frames and 28 240-second dark frames, all at ISO 800, as well as 32 flat and 50 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

a two-pane mosaic in hydrogen alpha.

Captured more of this awesome nebula and combined the images, it kinda looks more like its name now, i think.

H-alpha only.

ED80/ATK16HR - Astronomik ha clip filter.

5 min exposures x approx 10 each pane.

Voici la Voie lactée se levant derrière le Château de Vêves en Belgique.

Le château de Vêves, construit au bord d'un petit affluent de la Lesse, a des origines anciennes.

En effet, Pépin de Herstal y avait déjà élevé une villa dans la seconde moitié du VIIe siècle afin d'être plus près de l’ermitage de Saint Hadelin à Celles.

La villa fut ensuite transformée en une petite forteresse par ses différents successeurs au IXe siècle. Cette forteresse fut rasée en 1200 et reconstruite en 1220 par la famille Beaufort qui en fit un château-fort plus puissant.

Détruit par les Dinantais au xve siècle et rétabli aussitôt, le château eut encore à subir les ravages causés en 1793 par les révolutionnaires français.

Au XVIIIe siècle, la famille de Liedekerke-Beaufort restaura le château, lui donnant son aspect actuel.

Avec les châteaux de Beersel, de Bouillon, de Corroy, de Horst, de Gand et de Lavaux, il constitue un des plus beaux châteaux médiévaux de Belgique.

En janvier 2018, le château de Vêves remporte le prix du patrimoine préféré des wallons.

-📷 : Canon EOS R6 Mk II.

-Canon 16-35mm f/2.8.

⚙️: 30 secondes d'exposition, ISO 2500.

-️️ : Traitement : Lightroom & Photoshop.

-📅 : J'ai pris cette photo le 10 Mai 2024 à 3h30.

Also known as the 'Eye of

God' or 'The eye of Sauron', The Helix Nebula is a planetary nebula located in the constellation Aquarius, lying at an approximate distance of 700lyrs away and a radius of 3lyrs across.

What we are seeing in this image is a star at the end of it's evolutionary process on its way towards becoming a white dwarf.

The Nebula has an apparent magnitude of 7.5, but is not visible to the naked eye easily, due to it's low surface brightness.

Shot from Hunter Valley Area north of Sydney Australia in Sept 2017

Exposure Time: 5mins per exposure/shot equalling:

2hrs 30mins of Luminous Channel

1hr 15mins each of RGB at 3hrs 45mins for colour channels

Total Image exposure of : 6hrs 15mins

Notes: this image was taken under difficult sky conditions and also could have done with alot more data, however the skies decided to not clear enough for me to get more data so there we have it for this year at least.

Equipment Used:

Telescope: William Optics 110Triplet

Mount: Paramount MYT

Camera: Atik One+OAG

Filters: Astronomik

Software Capture: The SkyX

Software Processing: Pixinsight

Here an image of the Cave Nebula, catalogue reference Sh2-155, an emission nebula in the constellation of Cepheus. It is embedded in a larger region containing emission, reflection and dark nebula. The brightest part of the nebula has an apparent magnitude of 7.7, being situated about 2400 ly from Earth. The somewhat unusual rendition shown here is derived from 6 filters in total: Hydrogen-alpha, sulphur-II and oxygen-III ultra-fast narrowband filters and g´, i´, and z-s´ photometric filters. The g´ filter (400-550nm) captures nicely the reflection nebula, whilst the i´ (700-845nm) and z-s´ (820-920nm) filters transmit infrared light at different wavelengths. The data from these two filters then needs to be colour-mapped to a visible region of the spectrum. The following colour mapping has been applied to create this particular image: g´ mid-blue, O-III cyan, Ha yellow, S-II sunset orange, i´ crimson, z-s´ purple. Stars are from the monochrome S-II integration.

Calibration, Registration, Integration in APP, further processing to taste in PS.

The viewing conditions were not as good as was hoped (Rhön, Germany) with intermittent thin cloud and dew that fell with a particularly heavy "thud" 😉 , still most of the data was usable ...

Total time: 11.5 hrs / ISO 400

Celestron RASA11

10Micron GM1000 HPS

SIGMA fp L (monochrome)

Baader ultra-fast narrowband and SLOAN/SDSS photometric filters

Small Magellanic Cloud in Ha and OIII Narrowband

For a ”Northern Lad” (in its broadest sense) seeing the SMC (visible in the Southern Hemisphere) is a wonderful new experience. This rendition using only Hydrogen alpha and Oxygen III emission data shows a myriad of structures - Bubbles of hydrogen gas (red/orange) sometimes filled with wisps of oxygen (blue) all driven by the intense radiation of newly forming stars. Massive tendrils that mark the remains of one Supernova after another … awe inspiring indeed. The massive galactic star field has been heavily reduced (in intensity) to enable the narrowband emission data to be more visible.

The data was collected on two wonderful visits to the Hakos Guestfarm, Namibia.

Celestron RASA 11

10 Micron GM1000 HPS

Moravian C1X 61000-M

The image is a three panel mosaic.

NGC 6727

An extremely intriguing area of the night sky. NGC 6727 is a combination of dark, reflection and emission nebula, with designations IC4812, NGC 6726 and NGC6729, along with the globular cluster NGC 6723 in the constellation Corona Australis that is approximately 500 light years distant. The extended field shows several regions of faint Ha-emission as well as several small reflection nebula. Of particular note is the beautiful semi-circular Ha-emission peppered with some faint wisps of reflection nebula (not OIII), excited rather than illuminated by the nearby star and demonstrating quite profoundly that hydrogen is a major constituent of the surrounding dust. Also to be seen is a relatively "large" spiral galaxy at the bottom of the nebula (Designation: PGC-62700, 250.000.00 light years distant). The Region NGC 6727 is actually the tip of a considerably larger dust cloud (4 panel mosaic) extended for quite away beyond the right hand edge of the single image. OIII and SII emissions are particularly present in the bright core of the system. A wonderful target and certainly not the last time I will be paying a visit.

The data was collected by myself using a remote rented system in Australia (Martin Pugh)

Takahashi FSQ106 EDX fitted with a 645RD F3.6 reducer

Player One Poseidon-m Pro Camera

10 Micron GM1000HPS

Total acquisition time (35,75 hrs for the single close-up image):

R: 17400 sec

G: 19800 sec

B: 15000 sec

H: 30600 sec

O: 22500 sec

S: 23400 sec

Image Of The Day 14.08.2024 - Astrobin

This is my early try of Rosette this season. I collected data during two nights. Started in Abastumani on October 19th, but could only capture H-alpha channel as the sun rose. I left Abastumani the next day but wanted to complete this project, so I drove outside Tbilisi again last night to collect the remaining channels. Here is it, the result of 2h32min total exposure!

Camera: QSI583

Scope: TS80APO 480mm f/6

Mount: iEQ30 Pro

with guiding

H-alpha 16*300sec bin 2x2

R,G,B 8*180sec bin 2x2

assembly & processing in PixInsight

little retouch in Lightroom

Special thanks to David Dvali

Scattata da casa con un telescopio SkyWatcher 200/1000, questa immagine rivela quanto lontano possiamo spingere lo sguardo:

se notate bene, ci sono diverse macchioline di luce, almeno quindici, che sembrano dei batuffolini di cotone.

Queste piccole macchie di luce sono in realtà non stelle ma galassie, ciascuna contenente miliardi di stelle, frammenti dell’immensa profondità del cosmo.

Al centro in alto in questa foto domina NGC 7331, una grande galassia a spirale simile alla Via Lattea, distante circa 40 milioni di anni luce, circondata da piccole galassie satelliti. Poche settimane fa in questa galassia è esplosa una nuova stella, una supernova, che però non sono riuscito a fotografare a causa del meteo.

In basso a destra si distingue il celebre Quintetto di Stephan, un gruppo apparentemente compatto ma in realtà sorprendente: quattro galassie sono a circa 200–300 milioni di anni luce, mentre una quinta, proiettata sulla stessa zona di cielo, è quasi dieci volte più vicina.

Negli anni ’60 questa discrepanza di distanze fece pensare a un misterioso “redshift non cosmologico”: sembrava assurdo che una galassia potesse trovarsi accanto ad altre con un redshift così diverso, come se le leggi che collegano l’espansione dell’Universo alla distanza fossero violate. Oggi sappiamo che è un semplice allineamento prospettico, ma rimane un curioso capitolo della storia dell’astronomia.

#NGC7331 #QuintettodiStephan #DeepSkyAstro #GalassieLontane #AstrofotografiaUrbana #CosmoProfondo #UniverseWonder #NightSkyPhotography #Astrophotography #SkyWatcher2001000 #GalacticIslands #SpacePerspective #RedshiftMystery #ExploringTheCosmos #CieloProfondo #AstroImaging #InfiniteUniverse #DeepSkyObjects #AstroPassion #CacciatoriDiGalassie

NGC 6188 / NGC 6193 / NGC 6164 / NGC 6165

In the heart of the southern skies, nestled within the constellation Ara, approximately 4000 light-year from Earth, lies a celestial story of life and death played out in the glowing embrace of the nebulae NGC 6188 and NGC 6164, illuminated by the brilliant stars of the open cluster NGC 6193. NGC 6188 stretches as a veil of stardust, where newborn stars emerge from towering pillars of dark gas, sculpted by the intense winds of their luminous companions in NGC 6193, into figures commonly known as the “Fighting Dragons”. Together the “Dragons” overlook the symmetrical lobes of the “Dragon’s Eye“, NGC 6164 and NGC 6165, which surround the massive O-Type star HD 148937. This star, in an advanced stage of its life has ejected material, that it now illuminates, with a further delicate outer viel of Oxygen (blue) being clearly visible. Together the region shows many aspects of the Vita Cealestis.

The second (and final) data set that was collected by myself using a rented remote system in Australia (Martin Pugh)

Takahashi FSQ106 EDX fitted with a 645RD F3.6 reducer

Player One Poseidon-m Pro Camera

10 Micron GM1000HPS

The image is a 3 panel mosaic with a total acquisition time of 62 hrs

Data Acquired: Telescope live 25 light frames all in FITS format stacked in Deep Sky Stacker and then processed in photoshop. Here are two versions the one highlighting the outer edges more is processed in Lightroom mobile

The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy approximately 2.5 million light-years from Earth and the nearest large galaxy to the Milky Way.

Total exposure: 4h 10m 0s

no.of frames - 25

My first attempt at astrophotography. fotografiabymiguel.com/2022/11/27/2022-my-first-astrophot...

M31 Andromeda galaxy is the nearest large galaxy next to our own Milky Way. It contains around 1 trillion stars and is 2.5 million light years away from Earth.

⏱️ 10h36m (159 x 4min ISO 400 frames)

Kaunas, Lithuania (Bortle 7 skies)

📅 December 2021 - January 2022

Setup:

📷 Canon EOSR unmodified

🔭 Skywatcher Explorer 150PDS

️ Baader MPCC and IDAS LPS-D2 filter

⚙️ Skywatcher HEQ5 Pro

↖️ Guiding with ZWO ASI 120MM Mini + ZWO 30mm Mini Guide Scope + PHD2

💻 Stacked and edited with DeepSkyStacker and PixInsight

IC1396 again, this time put through astro action 'ha->false colour black space'' as a starting point then tweaked for a better, more natural looking image.

This is a re edition of a capture made on 20 of July.

This was one my first captures made with the Canon T6i.

Omega Centauri is a giant! The biggest globular cluster of the milky way.

Setup:

88x60s, ISO 1600

Canon T6i

Long Perng 66/400

iOptron CEM25P

A large but relatively faint, emission nebula in Vulpecula. it contains the small reflection nebula NGC 6820 and the open cluster NGC 6823. It is most well known for the prominent pillar in the brighter core, though many other fascinating substructures can be seen in the dimmer parts of the nebulosity. The main body of the nebula is crossed by a dark cloud.

The image was taken with Ha (mapped to red), S-II (mapped to yellow/green), O-III (mapped to cyan) ultra-narrowband filters as well as with the g’ photometric filter (mapped to blue) to pick up the faint reflection nebulosity. The O-III signal is weakest but present in the bright core. Stars are from the sulfur-II plates and are thus without colour. Processing in AstroPixelProcessor, StarTools, PixInsight and Photoshop.

SIGMA fp L (Monochrome)

Celestron RASA 11

10 Micron GM1000 HPS

4,5 hrs, ISO 400, 620mm, F2.2

HaRGB image

Ha 16c300sec

R,G,B 8x180 each

TS80APO (480mm f/6)

QSI 583wsg

iOptron iEQ30 pro mount

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早兩天難得半晚天清，來試試每年秋季也要拍一下的M31。 M31（仙女座星系 Andromeda Galaxy） 是我們的一個鄰居星系，距離我們約250萬光年，大小約是銀河系的兩倍。因相信跟我們銀河系很相似，而常常被作為研究比較之用。

曝光訊號不太夠細節有點粗，留待日後好天再增加一點曝光時間吧！

Photo by Michael Leung

日期：5/9/2015 @ 北潭涌

相機：CentralDS 600D @ -1c

鏡頭：Borg 90FL w/0.72x reducer 360mm f/4

追星儀：iOptron ZEQ25

導星：Guided QHY5LII Mono

其他：IDAS LPS-D1 Filter

設定：ISO 1600, 240sec x 23 (Darkframe / Bias)

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 5025 / length of data axis 1

NAXIS2 = 3272 / length of data axis 2

NAXIS3 = 3 / length of data axis 3

EXTEND = T / FITS dataset may contain extensions

COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy

COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H

MIPS-FHI= 0.348013 / Upper visualization cutoff

MIPS-FLO= 0 / Lower visualization cutoff

BZERO = 0 / offset data range to that of unsigned short

BSCALE = 1 / default scaling factor

DATE = '2023-07-12T14:14:50' / UTC date that FITS file was created

DATE-OBS= '2023-07-09T20:29:44' / YYYY-MM-DDThh🇲🇲ss observation start, UT

INSTRUME= 'Canon EOS 600D' / instrument name

OBSERVER= ' ' / observer name

TELESCOP= ' 6 inches newtonian lxd75 ' / telescope used to acquire this image

ROWORDER= 'BOTTOM-UP' / Order of the rows in image array

XPIXSZ = 4.29 / X pixel size microns

YPIXSZ = 4.29 / Y pixel size microns

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

FOCALLEN= 762mm / Camera focal length

CCD-TEMP= 0 / CCD temp in C

EXPTIME = 299 / Exposure time [s]

STACKCNT= 35 / Stack frames

LIVETIME= 10465 / Exposure time after deadtime correction

EXPSTART= 2.46014e+06 / Exposure start time (standard Julian date)

EXPEND = 2.46014e+06 / Exposure end time (standard Julian date)

ISOSPEED= 800 / ISO camera setting

HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3

HISTORY .000), additive+scaling normalized input, normalized output, no image we

HISTORY ighting, equalized RGB

HISTORY Extraction du gradient (Correction : Subtraction)

HISTORY Neutralisation du fond du ciel

HISTORY Étalonnage des couleurs

HISTORY SCNR (type=neutre moyen, qté=1.00, préserve=true)

HISTORY Réduction de la trame (niveau=1.00)

HISTORY Transformation asinh : (stretch= 80.0, bp=0.00000)

HISTORY Transf. histogramme (mid=0.069, lo=0.120, hi=1.000)

HISTORY Transf. histogramme (mid=0.430, lo=0.038, hi=1.000)

HISTORY Débruitage NL-Bayes (mod=1.000, CC activée)

HISTORY Débruitage NL-Bayes (mod=1.000, VST activé))

END

The Eastern Veil Nebula is a part of the much larger Veil Nebula, a supernova remnant of a star 20 times the size of the Sun. It exploded 8000yrs ago and this cloud of ionized gas has been expanding ever since.

This image acquired through Ha (red) and OIII (blue) filters over a total integration time of 5.6hrs.

30 Ha and 38 OIII images (each 5min exposure length) stacked and processed in Pixinsight and Lightroom

This is my first image using my new autoguider.

Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 29 120-second light frames and 21 120-second dark frames, all at ISO 800, as well as 15 flats. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop. Diffraction spikes courtesy StarSpikes Pro.

An underrated area of the Gamma Cygni nebula IC 1318 - vdB 134 is a reflection nebula, reflecting the light of ω1 Cygni about 869 ly distant.

Toward the bottom of the frame is planetary nebula PLN 86 + 5 1.

128 * 3min lights OSC data with a Skywatcher 8" Quattro and Neodymium filter, lots of biases, flats and darks processed in APP, PI and Affinity.

Total exposure : 43 minutes

86x30 sec subs(no dark,bias flat frames)

Camera : Nikon D5600

Lens : 70-300 mm kit lens @300mm f6.3

Mount : iOptron Skyguider pro

Bortle scale :Class 4

Leo Triplet.

...................

It is a small group of galaxies located in the constellation Leo, located 30-35 million light-years away from Earth. This group is one of the most popular targets for both astrophotography and visual observations, January-April being the best time to image these galaxies.

As a brief individual presentation, these 3 galaxies are as follows:

NGC 3628 (the one on the left), also known as the Hamburger Galaxy, due to its shape as we see it - is about 35 million light-years away and is surrounded by a cloud of stellar dust that hides most of the galaxy.

Messier 65 (top right in the attached image) - is the smallest of the 3 galaxies and also the closest to Earth ("only" 31 million light-years away).

Messier 66 (the one on the right) - is the brightest galaxy in the group and is 35 million light-years away. According to specialists, this galaxy is the largest in the group, with a diameter of about 95,000 light-years, almost as big as our galaxy.

Technical info :

Mount: Skywatcher EQ6R Pro.

Telescope: Skywatcher 150PDS

Camera: ASI 533MC Pro.

Total exposure: 9 hours ( 180 light frames x 3 min ).

Stacking with Deep Sky Stacker.

Edit in Pixinsight.

Location : my Bortle 6+ backyard.

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蜘蛛星雲 Tarantula Nebula NGC2070

蜘蛛星雲位於劍魚座大麥哲倫星系邊上，離我們於約十六萬光年。它是本星系群中已知的最活躍最大的造星區，直徑近1000光年。如果把它拉近放到獵戶座大星雲 (離我們最近的大形造星區) 的位置，即離我們約 1500 光年處，它會在天空中占據 30 度約 60 個滿月的大少， 光度甚至可在地上做成影子。

近年有研究表示，這個區域的造星運動這麼劇烈，是由於多個星團碰撞結合所引致，甚至可能是大小麥哲倫星系的重力牽近所造成的。

Photo by Michael Leung

Location：Lake Pukaki, New Zealand

Camera：CentralDS 600D @ -15c

Telescope：Borg 90FL / 0.72 Reducer (360mm f/4)

Mount：iOptron ZEQ25 guided QHY5LII Mono

Exposure：ISO1600, 240s x11 (Core 30s x20)

拍攝難度：★★ (五星最高)

建議鏡頭焦距：300mm+

適合拍攝月份：9月 ~ 3月 (南半球)

大概方向：大麥哲倫星系附近

SIMPLE = T / file does conform to FITS standard

BITPIX = -32 / number of bits per data pixel

NAXIS = 3 / number of data axes

NAXIS1 = 5154 / length of data axis 1

NAXIS2 = 3443 / length of data axis 2

NAXIS3 = 3 / length of data axis 3

EXTEND = T / FITS dataset may contain extensions

COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy

COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H

MIPS-FHI= 0.248219 / Upper visualization cutoff

MIPS-FLO= 0 / Lower visualization cutoff

BZERO = 0 / offset data range to that of unsigned short

BSCALE = 1 / default scaling factor

DATE = '2023-07-01T16:13:35' / UTC date that FITS file was created

DATE-OBS= '2023-06-17T20:30:51' / YYYY-MM-DDThh🇲🇲ss observation start, UT

INSTRUME= 'Canon EOS 600D' / instrument name

OBSERVER= ' ' / observer name

TELESCOP= SHARPSTAR 61EDPH II / telescope used to acquire this image

ROWORDER= 'BOTTOM-UP' / Order of the rows in image array

XPIXSZ = 4.29 / X pixel size microns

YPIXSZ = 4.29 / Y pixel size microns

XBINNING= 1 / Camera binning mode

YBINNING= 1 / Camera binning mode

FOCALLEN= 274.445 / Camera focal length

CCD-TEMP= 0 / CCD temp in C

EXPTIME = 299 / Exposure time [s]

STACKCNT= 13 / Stack frames

LIVETIME= 3887 / Exposure time after deadtime correction

EXPSTART= 2.46011e+06 / Exposure start time (standard Julian date)

EXPEND = 2.46011e+06 / Exposure end time (standard Julian date)

ISOSPEED= 800 / ISO camera setting

CTYPE1 = 'RA---TAN' / Coordinate type for the first axis

CTYPE2 = 'DEC--TAN' / Coordinate type for the second axis

CUNIT1 = 'deg ' / Unit of coordinates

CUNIT2 = 'deg ' / Unit of coordinates

EQUINOX = 2000 / Equatorial equinox

OBJCTRA = '20 57 40.492' / Image center Right Ascension (hms)

OBJCTDEC= '+44 30 4.522' / Image center Declination (dms)

RA = 314.419 / Image center Right Ascension (deg)

DEC = 44.5013 / Image center Declination (deg)

CRPIX1 = 2601 / Axis1 reference pixel

CRPIX2 = 1731 / Axis2 reference pixel

CRVAL1 = 314.419 / Axis1 reference value (deg)

CRVAL2 = 44.5013 / Axis2 reference value (deg)

CDELT1 = -0.000895698 / X pixel size (deg)

CDELT2 = 0.000895518 / Y pixel size (deg)

PC1_1 = 1 / Linear transformation matrix (1, 1)

PC1_2 = 0.000953977 / Linear transformation matrix (1, 2)

PC2_1 = -0.00053159 / Linear transformation matrix (2, 1)

PC2_2 = 1 / Linear transformation matrix (2, 2)

PLTSOLVD= T / Siril internal solve

HISTORY mean stacking with winsorized sigma clipping rejection (low=3.000 high=3

HISTORY Rotation (90 deg)

HISTORY Rotation (90 deg)

HISTORY Extraction du gradient (Correction : Subtraction)

HISTORY Résolution astrométrique

HISTORY SCNR (type=neutre moyen, qté=1.00, préserve=true)

HISTORY Photométrie

HISTORY Rehaussement de la saturation (quantité=0.39)

HISTORY Recadrage (x=0, y=20, w=5154, h=3443)

HISTORY Transf. histogramme (mid=0.007, lo=0.016, hi=1.000)

HISTORY Déconvolution

END

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冬季銀河東昇

冬季的王者獵戶座在入夜後徐徐在東面升起來，在他左面就是銀河部分。銀河的塵埃結構及內裡的星雲可以透過長曝光拍下來，如果拍攝時使用了 APS-C 廣角鏡頭，還可以容下更多星雲、星座，令相片更為壯觀。

除此之外冬季銀河附近實際也伴隨著不少深空天體，如馬頭星雲、獵戶座大星雲、巫婆頭、神仙魚、玫瑰星雲、聖誕樹，遠處還有金牛座內的加州星雲及昂宿星團等等，構成了豐富的冬季銀河畫面。

Photo by - Timmy Wong

地點：Galloway Forest Park, Scotland

相機：Canon 450D (mod)

鏡頭：Canon EF17-40@f/4

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船底座星雲 Carinae Nebula NGC 3372

去年首次到南半球攝星，立馬花上兩晚來拍拍這個壯觀的船底座星雲。可惜沒遇上連續好天氣，未能再補上 Ha 窄頻，沒有好好表現出它漂亮的雲氣結構。

船底座星雲距離我們約 7500 光年，半徑約 4 百多光年。視角大小達 2 度 x 2 度，比起我們熟悉的 M42 看來要大上四倍 (M42 距離我們約 1300 光年，半徑 12 光年，視角大小約 1 度 x 1 度)。圖中還可以見到幾個有趣的天體：星雲中央的亮星海山二是銀河系中已知的最亮的恆星；左下方近圓形的 NGC 3324 加夫列拉．米斯特拉爾星雲；和再靠左角落的 NGC 3293 寶石星團。

Photo by - Michael Leung

Location：New Zealand - Lake Tekapo

Date: 2015/04/17-18

Mount: iOptron ZEQ25 guided QHY5LII Mono

Camera：CentralDS 600D @ -17c

Telescope：Borg 90FL w/0.72x reducer (360mm f/4)

Setting：ISO1600, 240s x50 (Core 30s x25), Dark, Bias

Process: PI, PS CC

香港拍攝難度：★★★ (五星最難)

適合鏡頭焦距：50 ~ 300mm

適合拍攝月份：1 月 ~ 3 月 (香港)

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季節、時間限定的南天大星雲

到南半球地區星攝，The Eta Carinae Nebula (船底座大星雲) 相信是首選。由於此星雲很光很大，所以也是十分容易拍攝！雖然是南半球的深空天體，但在香港會出現「季節限定」，並且拍攝它並不是十分困難，難度在於天公能否造美...

相片中的 Eta Carinae 在拍攝時已經是大約最高點，離水平約 7 度多仰角，所以大氣的透明度是一個十分重要因素，即使萬里無雲但有霧霾的話，難度會增加。可幸的是拍攝時候的天氣不錯 (春天來說)，實屬難得。

Photo by - Timmy Wong

地點：萬直水庫東壩

追星儀：哈雷 HL-1

相機：Canon EOS-M mod.

鏡頭：Canon EF 16-35mm f2.8L

設定：f/4, ISO1600, 180s x4

濾鏡：Astronomik CLS CCD

處理：PI, PS

香港拍攝難度：★★★ (五星最難)

適合鏡頭焦距：50 ~ 300mm

適合拍攝月份：1 月 ~ 3 月 (香港)

Taken with a TMB92L, Hutech-modified Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 35 120-second light frames and 31 120-second dark frames, all at ISO 800, as well as 35 flat and 50 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 59 90-second light frames, 40 90-second dark frames, 40 10-second light frames, 20 10-second dark frames, and 40 5-second exposures, all at ISO 800, as well as 15 flats. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

English below:

Nella parte più meridionale della costellazione del Cigno si trova il resto di supernova G65.2+5.7 esteso per circa 180 parsec. La sua parte meridionale è nota come Sh2-91: una dedole e bella struttura filamentosa distante da noi circa 2600 anni luce. Nella parte alta, al centro, è presente la piccola nebulosa planetaria PK064+05.1 attorno alla stella HIP96295 che appare molto arrossata.

Somma di pose guidate da 10 minuti per un totale di 16 ore e 50 minuti con filtro dualband Antlia ALP-T 5nm per la nebulosa mentre per le stelle sono una ventina di minuti di pose da 60 secondi senza filtri. Telescopio newton 150/600 con correttore Tecnosky 0.95x, camera Tecnosky Vision 571C, montatura Eq6-R Pro, elaborazione in HSO in Pixinsight.

In the southernmost part of the constellation Cygnus lies the supernova remnant G65.2+5.7, which extends for about 180 parsecs. Its southern portion is known as Sh2-91: a beautiful, intricate filamentary structure about 2,600 light-years away. In the upper center, the small planetary nebula PK064+05.1 orbits the star HIP96295, which appears very red.

A total of 16 hours and 50 minutes of guided exposures were taken using an Antlia ALP-T 5nm dual-band filter for the nebula, while the stars were taken for about twenty minutes of 60-second exposures without filters. 150/600 Newtonian telescope with a Tecnosky 0.95x corrector, Tecnosky Vision 571C camera, Eq6-R Pro mount, and HSO processing in Pixinsight.

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星空調色盤 (Rho Ophiuchi and Antares region)位於天蝎座頭和蛇夫座邊界位置的這個區域，有著色彩悅目的星雲結構。離地球約 500 光年距離， 是離我們最近的造星區域之一。

利用 360mm 焦距拍攝這個區域好像有點尷尬… 幾個高亮天體都被擠到邊邊處。本來想以 mosaic 方式拍攝可惜天氣並不理想，有機會再去南天旅行一定要再好好拍拍這個區域。

圖中可見多個有趣的天體。右下最光橙紅色的星是大火心宿二。 旁邊是反射星雲 IC4606，因為心宿二的關係呈現出比較少見的橙黃色。右上是球狀星團 M4。 它其實在背景比較遠的位置， 離地球約 7200 光年，左下還有一個小一點的球狀星團 NGC6144。圖左上角蛇夫座 Rho 星和旁邊兩顆星有著很有趣的米奇老鼠造型。包圍著的藍色反射星雲是 IC4604。

香港拍攝難度：★★★ (五星最高)

建議鏡頭焦距：100 ~ 135mm

適合拍攝月份：3 月 ~ 8 月 (香港)

大概位置：天蠍座近心宿二附近

Photo by Michael Leung

CentralDS 600D

Borg 90FL w/ 0.72x Reducer (360mm f/4)

iOptron ZEQ25

Guidled QHY5LII Mono

ISO 1600, 240s x21

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聖誕樹星團+錐狀星雲

宇宙內隱藏著大量寶藏，各式各樣的深空天體變化萬千，有不少更看似「似曾相識」。俗稱「聖誕樹」的深空天體就有聖誕樹星團 + 錐狀星雲 (Christmas Tree Cluster + Cone Nebula)，大家看看又是否像聖誕樹一樣般吸引呢？在此順道祝大家聖誕節快樂！

Photo by Timmy Wong

地點：星明天文台

相機：SBIG STL-11000M

望遠鏡：Takahashi FSQ106N

赤道儀：NEQ6 (+EQMOD)

設定：Ha: 900s x11, R: 600s x4, G: 600s x4, B: 600s x4

香港拍攝難度：★★★★ (五星最難)

建議鏡頭焦距：200 ~ 500mm

適合拍攝月份：11 月 ~ 2 月 (香港)

Imaged on September 9th, 2023. A Wide field view showing the NGC 6888, SH2-101, and WR 134. This spring and summer have been challenging, with abundant clouds during prime imaging time and wildfire smoke, which blanketed the night skies. I welcome cooler temps and hopefully clearer skies in October.

OTA: William Optics RedCat 51 II

Main Camera: ZWO ASI2600MC Pro

Mount: ZWO AM5 · ZWO TC40 Carbon fiber tripod

Filter: Antlia ALP-T Dual Band 5nm 2"

Accessories: Astrozap 4" Dew Heater · Pegasus Astro Powerbox Micro · Starizona Filter Drawer 2" · ZWO ASIAIR Mini · ZWO EAF

Software: Adobe Lightroom · Pleiades Astrophoto PixInsight

Guidescope: William Optics UniGuide 50mm

Guide Camera: ZWO ASI220MM Mini

A section of NGC 7000 called The Wall.

A large, relatively bright emission nebula in Cygnus.

The whole nebula resembles the map shape of North America, hence the name.

Taken between thick passing cloud, in good seeing conditions. Shot in Hydrogen alpha light. Start of a mosaic.

10 X 5min subs. + 6 x Darks.

ED80 - atik16hr - EQ6 - finderguider - asi120mc.

The Milky Way inside a sphere

La Via láctea dentro de una esfera.

English:

In this composition we can see a sphere resting on a rock that projects the center of the Milky Way and the mountains of the "Cajon del Maipo." The sphere inversely projects the image, to invert the image so that it seems coherent, that's why you can see the sphere at the top hanging from the rock.

In the background you can see the Milky Way much closer, you can see stars with drift (by the movement of terrestrial rotation) and diffusely the various nebulae that look towards the galactic nucleus.

Capturada el pasado 05/04/2019.

BallLens, macro 100mm

Iso 1600, Sony A77.

Autor: Mario Poblete

Imaged on September 9th, 2023. A Wide field view showing the NGC 6888, SH2-101, and WR 134. This spring and summer have been challenging, with abundant clouds during prime imaging time and wildfire smoke, which blanketed the night skies. I welcome cooler temps and hopefully clearer skies in October.

OTA: William Optics RedCat 51 II

Main Camera: ZWO ASI2600MC Pro

Mount: ZWO AM5 · ZWO TC40 Carbon fiber tripod

Filter: Antlia ALP-T Dual Band 5nm 2"

Accessories: Astrozap 4" Dew Heater · Pegasus Astro Powerbox Micro · Starizona Filter Drawer 2" · ZWO ASIAIR Mini · ZWO EAF

Software: Adobe Lightroom · Pleiades Astrophoto PixInsight

Guidescope: William Optics UniGuide 50mm

Guide Camera: ZWO ASI220MM Mini

This image is not at full resolution, but still best viewed LARGE.

Click on the image to ZOOM In and Out".

A wide field view of the Eagle Nebula (catalogued as Messier 16, M16, or NGC 6611, and also known as the Star Queen Nebula and The Spire). M16 is a young open cluster of stars in the constellation Serpens.

The Eagle Nebula is part of a diffuse emission nebula, or H II region, which is catalogued as IC 4703. This region of active current star formation is about 7000 light-years distant. A spire of gas that can be seen coming off the nebula in the north-eastern part is approximately 9.5 light-years or about 90 trillion kilometers long.

Both the "Eagle" and the "Star Queen" refer to visual impressions of the dark silhouette near the center of the nebula, an area made famous as the "Pillars of Creation" photographed by the Hubble Space Telescope. The nebula contains several active star-forming gas and dust regions, including the Pillars of Creation.

The cluster associated with the nebula has approximately 8100 stars, which are mostly concentrated in a gap in the molecular cloud to the north-west of the Pillars.

The size, distance and age of the Universe is far beyond human comprehension. The known Universe is estimated to contain over One Billion Trillion stars, many with planets just like our star the Sun.

1 000 000 000 000 000 000 000

About Emission nebulae:

Emission nebulae are glowing clouds of interstellar gas which have been excited by some nearby energy source, usually a very hot star. The red light seen in this picture is glowing hydrogen captured in the Hydrogen-Alpha (Hα) Infrared wavelength of light at 656nm.

About this image:

This image consists of 8 x 3 minute exposures at ISO 6400. Photographed in the rural dark skies of the Karoo (Northern Cape, South Africa).

About the Star Colors:

You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Orion StarShoot Autoguider.

Celestron AVX Mount.

Aurora Flatfield Panel.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 8 x 180 sec. ISO 6400 CFA FIT Files.

Calibration Frames:

50 x Bias

30 x Darks

20 x Flats

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1195912#annotated

RA, Dec center: 274.676478398, -13.8142171692 degrees

Orientation: 1.2612306337 deg E of N

Pixel scale: 5.90362564941 arcsec/pixel

Martin

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Orion and running man nebulae. Eos 600d and sharpstar 61 edph II. 2022/12/27

Val Racine, Québec, Canada - Printemps 2016

My friend and I went near Mont-Mégantic for a wonderful astronomy trip. On our last night, we got up at 2am in the hope of observing the galactic center of the Milky Way (right). It is just beginning to be visible in the spring. Just before sunrise (light blue halo on the left), the clouds left and we were able to capture the entire Milky Way. The yellow halos are caused by light pollution Val Racine (left) and Notre-Dame-des-Bois (right, in the clouds).

---

Mon ami et moi nous sommes rendus près du Mont-Mégantic pour un merveilleux séjour d'astronomie. Je vous le conseil vraiment, le ciel étoilé est une richesse! À notre dernière nuit, nous nous sommes levés à 2h du matin dans l'espoir d'observer le centre galactique de la Voie Lactée (à droite). Il commence à peine à être visible au printemps. Quelle chance nous avons eu! Juste avant le lever du soleil (ciel bleu pâle à gauche), les nuages ont quitté et nous avons pu capturer l'ensemble de la Voie Lactée. Les halos jaunes sont causés par la pollution lumineuse de Val Racine (à gauche) et Notre-Dame-des-Bois (à droite, dans les nuages).

À bientôt,

Fred

North America nebula is an emission nebula in the constellation Cygnus 2590 light years from Earth. It's size across is 90 light years. Pelican nebula is on the right side of the image.

⏱️ 10h (147 x 4min ISO 800 frames)

Kaunas, Lithuania (Bortle 8 skies)

📅 October, 2021

Setup:

📷 Canon EOSR unmodified

🔭 Skywatcher Explorer 150PDS

️ Baader MPCC and IDAS LPS-D2 filter

⚙️ Skywatcher HEQ5 Pro

↖️ Guiding with ZWO ASI 120MM Mini + ZWO 30mm Mini Guide Scope + PHD2

💻 Stacked and edited with DeepSkyStacker and PixInsight

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佳節將近，《星野行》在此祝大家聖誕新年快樂。

聖誕樹星團 / 錐狀星雲

近中央三角形分佈的就是聖誕樹星團 (NGC2264)，樹頂位置是倒著的錐狀星星雲，這片美麗的天區是在麒麟座附近，要尋找也不困難。

除此之外圖中還有一些有趣的天體，如緊接聖誕樹左下有點毛毛的是狐狸皮星雲，還有左上像個彎刀的有趣星雲 - 哈勃變光星雲 (NGC2261, Hubble's Variable Nebula)。

Photo by Michael Leung

Date: 5 Nov 2016

Location: 廣東 從化

Camera: ASI 1600MM-C @ -10c

Telescope: Borg 90FL w/0.72x reducer (360mm f/4)

Mount: AZEQ6 Guided ASI120MM-S

Setting: Ha 10min x9, LRGB 3min x8 per channel.

Process: PI, PS CC

Eta Carinae Nebula region shot in Hydrogen Alpha, this was a test series of frames of the new mount, so was never intended to be a finished image.

Distance of object about 6500 - 10'000 light years.

Further info here :

en.wikipedia.org/wiki/Carina_Nebula

Heres an 'older' wider field of View version in colour of the same region flic.kr/p/wNLY6B

This huge ball of stars predates our Sun. Long before mankind evolved, before the dinosaurs roamed and even before the Earth existed, several star globes condensed and orbited a young galaxy, the Way Milky Of the approximately 200 globular clusters that survive today, Omega Centauri is the largest, with some ten million stars. Omega Centauri is also the brightest globular cluster: with an apparent visual magnitude of 3.9 it is visible to the naked eye for southern observers. Cataloged as NGC 5139, Omega Centauri is about 18,000 light years away and is 150 light years across. Unlike many other globular clusters, Omega Centauri stars have different ages and several chemical traces, indicating that this 12-billion-year globular cluster has a complex history.

Captured 12, december, 2018.

Autor: Mario Poblete

IC 1805, surnommée la nébuleuse du Cœur, est une nébuleuse en émission située à environ 6 500 année-lumière dans la constellation de Cassiopée.

Au centre de cette nébuleuse se trouve un amas ouvert, Melotte 15

Newton SkyWatcher 200/1000

Monture EQ6-r pro

ASI 2600 MC pro

Correcteur de coma Baader MPCC Mk III

ZWO OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Filtre Optolong l-eXtreme 2"

Traitement PixInsight + Photoshop CC

Prise le 13/02/2021 :

110*300" => 9h10'

Gain 100 - Temp -20°C

DOF

IC4628 is located in the constellation of Scorpius around 6000 light years from earth.

(this is only a 'portion' of the actual nebula).

Shot from Newport area Sydney Australia.

Exposure Time: 10mins per exposure/shot equalling:

4hrs of Hydrogen Alpha.

Equipment used:

Telescope: William Optics 110Triplet

Mount : Paramount MYT

Camera: Atik One+ OAG

Filters: Astronomik HA 6nm

Software (Capture): The SkyX

Processing : Pixinsight.

Downloaded the trial version of PixInsight the other day (for the third time), and gave it a good going over, as much as I could. Finally came to the conclusion, rightly or wrongly, that there isn't a huge amount in PI that can't be done in PS, with one or two exceptions, one of which is DBE.

I used DBE on this as the gradient had caused problems in my previous iterations, then processed in PS. One other plus from PI was that, having studied a few tutorials, I learnt a bit more about noise reduction, and put that into practice.

This has to be my final version of this - I'm not going to get anything more out of it. I think it beats my previous one :) I saw a version of this the other day, probably better than this, that consisted of less than 3 hours of 5 minute subs - my skies got a verbal lashing that night, I can tell ya! :)

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

16 hours of 4 - 12 minute subs @ ISO 640 - 1600

Guiding: Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS and processed in PI and CS5

M51, ou galaxie du Tourbillon, est un couple de galaxies, à environ 27 millions d'années-lumière de la Terre dans la constellation des Chiens de chasse.

Il est composé d'une galaxie spirale régulière massive dont le diamètre est estimé à 100 000 années-lumière et d'une petite galaxie irrégulière.

Première lumière de la caméra OSC ASI 2600 MC pro

Newton SkyWatcher 200/1000

Monture EQ6-r pro

ASI 2600 MC pro

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Traitement PixInsight + Photoshop CC

Prise le 10/02/2021 :

69*300" => 5h45'

Gain 100 - Temp -20°C

DOF