View allAll Photos Tagged globularcluster
A cluster of over a million stars.
A combination of 60 second images and 180 second images (to give a high dynamic range). Taken on 6th June 2011 with my new QHY8L cooled CCD.
5 usable lights (60s), 10 darks, 20 flats, 20 bias. Canon EOS 450D DSLR prime focus, ISO1600. Baader Neodymium filter and coma corrector. Sky-Watcher 150P Explorer on EQ3-2 mount. DeepSkyStacker > PixInsight > PhotoShop. Dogged by mount problems had to fix some trailing in PixInsight with Morphological Transformation.
LATEST VERSION: flic.kr/p/2rxcArQ
Messier 3 / M3 / NGC 5272
Messier 3 is one of the brightest globular clusters in the northern sky and it contains about 500,000 stars. It is about 34,000 light-years away, orbiting the Milky Way, and it is estimated to be 11.39 billion years old. It is often overshadowed by M13, a slightly brighter cluster: flic.kr/p/2oKjm3J
Total integration: 8 hours 28 minutes (508 minutes)
02/17/19: 134 x 60 seconds ISO800
03/17/19: 374 x 60 seconds ISO800
Location: Charlottesville, VA
SQM: 19.22 mag/arcsec^2 (Bortle 6)
Camera: Canon T3i (stock/unmodified)
Telescope: Explore Scientific ED80 f/6.0 Apochromatic Refractor (with ES field flattener)
Mount: Orion Sirius EQ-G (unguided)
Stacked with PixInsight, processed with PixInsight and Paint.NET
Edited Hubble Space Telescope image of the globular cluster NGC 1805 in the Large Magellanic Cloud. Color/processing variant.
Original caption: Many colourful stars are packed close together in this image of the globular cluster NGC 1805, taken by the NASA/ESA Hubble Space Telescope. This tight grouping of thousands of stars is located near the edge of the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. The stars orbit closely to one another, like bees swarming around a hive. In the dense centre of one of these clusters, stars are 100 to 1000 times closer together than the nearest stars are to our Sun, making planetary systems around them unlikely. The striking difference in star colours is illustrated beautifully in this image, which combines two different types of light: blue stars, shining brightest in near-ultraviolet light, and red stars, illuminated in red and near-infrared. Space telescopes like Hubble can observe in the ultraviolet because they are positioned above Earth’s atmosphere, which absorbs most of this wavelength, making it inaccessible to ground-based facilities. This young globular cluster can be seen from the southern hemisphere, in the Dorado constellation, which is Portugese for dolphinfish. Usually, globular clusters contain stars which are born at the same time; however, NGC 1805 is unusual as it appears to host two different populations of stars with ages millions of years apart. Observing such clusters of stars can help astronomers understand how stars evolve, and what factors determine whether they end their lives as white dwarfs, or explode as supernovae.
Here is my first picutre of the Great globular Cluster in Hercule constellation taken last night.
The full moon was a bit disturbing and despite the polar alignement was not precisely made, I managed to get a result that I hoped worst !
This image is made of 20 frames of 15 seconds each at ISO 1600 with a Canon T3i.
The telescope used is a 200/800 reflector (without coma corrector ^^)
20 x 15 secs
ISO 1600
F/4
800 mm
Omega Centari NGC 5139 The largest Globular Cluster associated with the Milky Way.
located in Centaurus constellation
2014-3-8 (Thailand)
Orion EON 120 ED Apo Refractor; Starlight Xpress Trius SX9C CCD; Losmandy G-11 equatorial mount w/ Gemini 2; Orion ST80 guidescope (piggybacked); Starlight Xpress lodestar autoguider; 6x180sec exposures
A little change of pace...
20 cm Newt
180sec exp (RGB) (5)
speed imaging
NO color adjustment...
Some decon and HDR wavelets to sharpen the stars.
I will reprocess WITHOUT sharpening...see if it is more aesthetically pleasing.
I find this looks WAY to harsh...
It certainly does not compare with M13 for star field depth.
Here is a pro's result;
I think binning is a bad idea here...
Good DSLR image here;
While waiting for M13 to clear the trees I zeroed in on this nice Globular cluster.
Meade LX200 Classic 8" FR/FF f/6.3
Canon EOS 40D unmod
Autoguided Orion SSAG + $16 scope
PHD
20x3 min @ ISO 800
64 darks
64 flats
Stacked in DSS
Pulled and Tugged CS3
NR and final tweaks Canon DPP
The Great Globular Cluster in Hercules with a Nikon D7000, Skywatcher Explorer 200PDS and HEQ5 Pro. Single RAW shot.
Taken on June 6, 2011 near Butler, Missouri using an SBIG8300C camera mounted on a CGE1100 Telescope using Hyperstar (F/2). This is the sum of 14 two minute images, stacked using DeepSkyStacker. The image was then processed with Photoshop CS2.
Guiding used PhD Guiding with an Orion Starshoot autoguider.
The globular cluster M3 in Canes Venatici. Imaged from Chantry park in Ipswich, Suffolk, UK on April 9th.
Imaged using my Meade S5000 127mm Apo refractor on a HEQ5-pro mount with a Canon Eos 350D SLR.
Total of 40 X 30sec frames at ISO 800 plus 10 X dark frames, stacked in DSS and edited in photoshop... with final editing help by Cloudwatcher on the SGL forums.
Messier 3 (also known as M3 or NGC 5272) is a globular cluster of stars in the northern constellation of Canes Venatici. This cluster is one of the largest and brightest, and is made up of around 500,000 stars. It is estimated to be 8 billion years old. It is located at a distance of about 33,900 light-years away from Earth.
26 x 30 second exposures at 6400 ISO plus 10 dark frames and eight flat frames. Processed in Deep Sky Stacker and Photoshop CS6.
What's causing a huge jet to emanate from the center of galaxy M87? Although the unusual jet was first noticed early in the twentieth century, the exact cause is still debated. The above picture taken by the Hubble Space Telescope in 1998 shows clear details, however. The most popular hypothesis holds that the jet is created by energetic gas swirling around a massive black hole at the galaxy's center. The result is a 5000 light-year long blowtorch where electrons are ejected outward at near light-speed, emitting eerily blue light during a magnetic spiral. M87 is a giant elliptical galaxy residing only 50 million light-years away in the Virgo Cluster of Galaxies. The faint dots of light surrounding M87's center are large ancient globular clusters of stars.
Image Credit: J. A. Biretta et al., Hubble Heritage Team (STScI /AURA), NASA
Messier 14 (also known as M14 or NGC 6402) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.
At a distance of about 30,000 light-years, M14 contains several hundreds of thousands of stars. At an apparent magnitude +7.6 it can be easily observed with binoculars. Medium-sized telescopes will show some hint of the individual stars of which the brightest is of magnitude +14.
The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 is about 100 light-years across.
A respectable total of 70 variable stars is known in M14, many of the W Virginis variety common in globular clusters. In 1938, a nova appeared although this was not discovered until photographic plates from that time were studied in 1964. It is estimated that the nova reached a maximum brightness of magnitude +9.2, over five times brighter than the brightest 'normal' star in the cluster.
Image Credit & Copyright: Robert Gendler (www.robgendlerastropics.com)
Camera: Nikon D50
Exposure: 16m (8 frames) ISO 800 RGB
Filter: Orion Skyglow Imaging Filter
Focus Method: Prime focus
Telescope Aperature/Focal Length: 203×812mm
Mount: LXD75
Telescope: Meade 8" Schmidt-Newtonian
Guided: Yes - PHD Guiding
Stacked: DeepSkyStacker
Adjustments: cropped/leveled in Photoshop
Location: Flintstone, GA
Edited Hubble Space Telescope image of the core of the globular cluster Omega Centauri. Inverted grayscale variant.
Original caption: The NASA/ESA Hubble Space Telescope snapped this panoramic view of a colourful assortment of 100 000 stars residing in the crowded core of a giant star cluster. The image reveals a small region inside the massive globular cluster Omega Centauri, which boasts nearly 10 million stars. Globular clusters, ancient swarms of stars united by gravity, are almost as old as our Milky Way galaxy. The stars in Omega Centauri are between 10 billion and 12 billion years old. The cluster lies about 16 000 light-years from Earth. This is one of the first images taken by the new Wide Field Camera 3 (WFC3), installed aboard Hubble in May 2009, during Servicing Mission 4. The camera can snap sharp images over a broad range of wavelengths. The photograph showcases the camera's colour versatility by revealing a variety of stars in key stages of their life cycles. The majority of the stars in the image are yellow-white, like our Sun. These are adult stars that are shining by hydrogen fusion. Towards the ends of their normal lives, the stars become cooler and larger. These late-life stars are the orange dots in the image. Even later in their life cycles, the stars continue to cool down and expand in size, becoming red giants. These bright red stars swell to many times larger than our Sun's size and begin to shed their gaseous envelopes. After ejecting most of their mass and exhausting much of their hydrogen fuel, the stars appear brilliant blue. Only a thin layer of material covers their super-hot cores. These stars are desperately trying to extend their lives by fusing helium in their cores. At this stage, they emit much of their light at ultraviolet wavelengths. When the helium runs out, the stars reach the end of their lives. Only their burnt-out cores remain, and they are called white dwarfs (the faint blue dots in the image). White dwarfs are no longer generating energy through nuclear fusion and have gravitationally contracted to the size of Earth. They will continue to cool and grow dimmer for many billions of years until they become dark cinders. Other stars that appear in the image are known as "blue stragglers". They are older stars that acquire a new lease of life when they collide and merge with other stars. The encounters boost the stars' energy-production rate, making them appear bluer. All of the stars in the image are cosy neighbours. The average distance between any two stars in the cluster's crowded core is only about a third of a light-year, roughly 13 times closer than our Sun's nearest stellar neighbour, Proxima Centauri. Although the stars are close together, WFC3's sharpness can resolve each of them as individual stars. If anyone lived in this globular cluster, they would behold a star-saturated sky that is roughly 100 times brighter than Earth's sky. Globular clusters were thought to be assemblages of stars that share the same birth date. Evidence suggests, however, that Omega Centauri has at least two populations of stars with different ages. Some astronomers think that the cluster may be the remnant of a small galaxy that was gravitationally disrupted long ago by the Milky Way, losing stars and gas. Omega Centauri is among the biggest and most massive of some 200 globular clusters orbiting the Milky Way. It is one of the few globular clusters that can be seen with the unaided eye. Named by Johann Bayer in 1603 as the 24th brightest object in the constellation of Centaurus, it resembles a small cloud in the southern sky and might easily be mistaken for a comet. Hubble observed Omega Centauri on 15 July 2009, in ultraviolet and visible light. These Hubble observations of Omega Centauri are part of the Hubble Servicing Mission 4 Early Release Observations.
18/03/2009; Debrecen (downtown).
M53 (NGC 5024) is a globular cluster in the Coma Berenices constellation. M53 is one of the more outlying globular clusters, being about 60,000 light-years away from the Galactic Center, and almost the same distance (about 58,000 light-years) from the Solar system. -wikipedia
scope: 70/500 SW refractor
guiding scope: 80/400 SW refractor
mount: Celestron CG-4 with SW EQ3 RA motor drive
guide: 12.5mm reticle eyepiece, TeleVue 2x barlow, manually guided
filter: Baader UHC-S
camera: Baader-ACF mod. Canon EOS 350D
cond. of exp.: 44x40-190sec @ iso 800 in prime focus
cond.: taken during its rising.
processing: Iris(composit, asinh, noffset, rgbbalance), PS(levels, curves); only dark (10 frames) correction was applied.
Imaging:
Canon 1D3 on Skywatcher Equinox 80mm
Lights 30 x 240s f/6.25 ISO 200
Darks 14 x
Flats 64 x
Bias 75 x
Guiding:
Piggy Back. Orion Starshoot on Skywatcher 80mm f/5 refractor.
Guide Frames x 1s
- - - - -
Think i missed focus here, but none the less a solid image. about as good as i was hoping.
This is a combination of almost 300 15-second images taken at ISO 1600 from an extremely light-polluted sky (next-door neighbor had 5 sodium vapor or other {unshielded} intense lights on at the time) combined with the full Moon's
illumination. The Moon looked very dim compared to the neighbor's lights - bad
neighbor! Canon 40D in prime focus behind a Takahashi TOA-130 refractor, mounted on an unguided Losmandy G11 Gemini mount. Camera white balance was set at Daylight position (gives me less reddish-brown sky to start with).
One more nicety recently added to my arsenal was a Bahtinov focusing mask. Wow, is that cool! I focused the camera using the live preview magnified at 10X on Arcturus, found the sweet spot at optimum focus where the middle diffraction spike was centered perfectly between the other two fixed spikes visible on the camera's LCD, then locked the scope's focuser and slewed to M13. I had also used this mask for my previously-taken Moon image I posted earlier today.
Images were combined with DeepSkyStacker. I also included dark frames and bias frames, but since it was about 2:30 a.m. this morning when I got done capturing photons, I did not wait to take flat files (to help with vignetting) in the early morning twilight - hey, I've got to get some sleep sometime! My computer was still crunching the photons and assembling the whole shebang when I got up this morning. Multiple iterations of levels and curves were applied in Photoshop CS4, and a couple of choice Noel Carboni's Photoshop Actions were applied, including the frame and diffraction star spikes for added "zest".
Enjoy! Comments and critiques welcome as always.
Paul
Canon EOS 400D au foyer d'un télescope Newton 150mm (750mm de focale)
13 poses 20s à 800 ISO
5 darks - 7 flats - 9 offsets
Traitement IRIS et Photoshop
Lieu : Petit-Croix (Territoire de Belfort)
Date : 20/05/2009
Edited Hubble Space Telescope image of the globular cluster NGC 6397.
Original caption: This ancient stellar jewelry box, a globular cluster called NGC 6397, glitters with the light from hundreds of thousands of stars. Astronomers used the NASA/ESA Hubble Space Telescope to gauge the cluster’s distance at 7800 light-years away. NGC 6397 is one of the closest globular clusters to Earth. The cluster’s blue stars are near the end of their lives. These stars have used up their hydrogen fuel that makes them shine. Now they are converting helium to energy in their cores, which fuses at a higher temperature and appears blue. The reddish glow is from red giant stars that have consumed their hydrogen fuel and have expanded in size. The myriad small white objects include stars like our Sun. This image is composed of a series of observations taken from July 2004 to June 2005 with Hubble’s Advanced Camera for Surveys. The research team used Hubble’s Wide Field Camera 3 to measure the distance to the cluster.
Equipment: Nikon D5300, Tamron SP 70-300mm f/4-5.6 Di VC USD lens, and iOptron Skytracker. Taken at 300mm, f/8.0, ISO 6400, 55 frames of 30 seconds each plus 30 darks. Stacked in Regim and cropped/processed in Lightroom.
✨ Messier 15 – A Cosmic Jewel in Pegasus ✨
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Gaze upon Messier 15 (M15), one of the densest and most ancient globular clusters in the Milky Way. This tightly packed sphere of stars, shining brilliantly in the constellation Pegasus, has fascinated astronomers for centuries.
📍 Constellation: Pegasus
✨ Distance from Earth: ~33,600 light-years
📏 Diameter: ~175 light-years
⭐ Apparent Magnitude: +6.2
🌀 Age: ~12.5 billion years
🌟 Interesting Facts:
M15 is home to a dense core, possibly containing a central black hole, making it one of the few globular clusters with this feature.
It contains over 100,000 stars, many of which are red giants and variable stars.
It houses one of the largest known populations of pulsars and neutron stars in any globular cluster.
First cataloged by Jean-Dominique Maraldi in 1746, it was later added to Charles Messier’s famous catalog.
A true relic of the early universe, M15 stands as a living fossil of our galaxy’s formation. What fascinates you most about these ancient stellar cities? Let me know in the comments! 🌠
Lights: 10x60" each filter (RGB)
Dataset: Moana Project (Blackrig/Elleraz)
Camera ZWO ASI 1600 MM COOL
Telescope: DIY Moana 10" f/5.3 Newtonian (250/1325)
Filters: Baader (CMOS-Optimized) 36 mm
Processed: PixInsight
#Astrophotography #Messier15 #M15 #GlobularCluster #DeepSpace #CosmicWonders #AstronomyLovers #SpaceExploration #StarrySky
Globular Cluster (M79)
Globular Cluster in Canis Major Dwarf Galaxy
2013-12-26 (Thailand)
Orion EON 120 ED Apo Refractor; Starlight Xpress Trius SX9C CCD; Losmandy G-11 equatorial mount w/ Gemini 2; Orion ST80 guidescope (piggybacked); Starlight Xpress lodestar autoguider; 12x300sec exposures
According to Wikipedia: "Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities toward their centers."
Thought I'd have another go at M13 to see the difference since getting my telescope repaired. Compared to previous attempts, this shot also used an Antares light pollution filter, and after stacking and processing in Deep Sky Stacker, I set the black point in the Gimp.
This shot used 45x 30 second exposures at ISO800 on a Canon T1i, Meade SN-10AT 10" telescope. 22.5 minutes total exposure time plus dark and flat frames.
Seems to me the stars are shaped a bit better in this one, a little more resolution in the object. If I had the camera oriented differently I might not have missed picking up the small galaxy at the top of the image in all but a few of the exposures, probably should have cropped that out but I like galaxies :)
Messier 2 or M2 (also designated NGC 7089) is a globular cluster in the constellation Aquarius, five degrees north of the star Beta Aquarii. It was discovered by Jean-Dominique Maraldi in 1746, and is one of the largest known globular clusters.
M2 was discovered by the French astronomer Jean-Dominique Maraldi in 1746 while observing a comet with Jacques Cassini. Charles Messier rediscovered it in 1760, but thought it a nebula without any stars associated with it. William Herschel, in 1783, was the first to resolve individual stars in the cluster.
M2 is about 37,500 light-years distant from Earth. At 175 light-years in diameter, it is one of the larger globular clusters known. The cluster is rich, compact, and significantly elliptical. It is 13 billion years old and one of the older globulars associated with the Milky Way Galaxy.
The Constellation of Auriga, just above and to the left of Orion.
Lots of stars and some Globular Clusters for added goodness!
20 minutes of exposure at f/2.2 ISO200
Great Globular Cluster in Hercules (M13)
A composite of 16 thirty second exposures thru my Meade LX200 telescope using my Meade DSI Pro III imager. The individual captures were calibrated using dark frames and flat frames and then stacked and processed using Stark Labs' nebulosity software. The telescope was guided during the exposures by an Orion 80mm Short Tube telescope with a Meade DSI Pro imager driven by Stark Lab's PHD autoguiding software. All light frames were taken through a Meade L (IR) CCD filter—no color information was captured for this object at this time. Light frames were imaged on April 25, 2009 between 3:02 AM and 3:12 AM near Ellenville, NY.
M 5 si trova nella costellazione del Serpente, è difficilmente visibile ad occhio nudo. Ha una Magnitudine apparente di 5.6 ed una dimensione apparente di 23’.0 e si sta allontanando dal Sistema Solare ad una velocità di oltre 50 km/s.
M5 fu scoperta dall'astronomo tedesco Gottfried Kirch nel 1702 mentre osservava una cometa. Charles Messier la notò nel 1764 e, uno studioso di comete, la definì una delle sue nebulose. William Herschel fu il primo a risolvere le singole stelle nell'ammasso nel 1791, contandone circa 200.
M5 può essere osservato da entrambi gli emisferi terrestri, grazie al fatto che la sua posizione è praticamente equatoriale: l'oggetto infatti raggiunge quasi la medesima altezza in cielo da ogni coppia di latitudini opposte (ad esempio 30°N e 30°S), pertanto nessun emisfero risulta particolarmente privilegiato rispetto all'altro per la sua osservazione.[3] Il periodo migliore per la sua individuazione nel cielo serale è quello compreso fra aprile e settembre. La sua distanza dalla Terra è stimata essere di circa 24.500 anni-luce !
Dati di scatto:
Io l’ho ripresa in diverse nottate dall’11 Giugno al 14 Luglio dal terrazzo di casa ma le ore di integrazione sono state davvero poche: solo 2h 8min 20sec.
•Telescopio newton GSO 154/600, Camera di ripresa ASI 294 MC Pro
•Telescopio guida 60/240, Camera ASI 120 mini
•Montatura Equatoriale Sky-Watcher HEQ5 SynScan GOTO
•Acquisizione Asiair Pro, Elaborazione in RGB con Pixinsight.
M5 is located in the constellation Serpens and is barely visible to the naked eye. It has an apparent magnitude of 5.6 and an apparent size of 23.0', and is moving away from the Solar System at a speed of over 50 km/s.
M5 was discovered by the German astronomer Gottfried Kirch in 1702 while observing a comet. Charles Messier noticed it in 1764 and, a comet scholar, called it one of his nebulae. William Herschel was the first to resolve the individual stars in the cluster in 1791, counting about 200 of them.
M5 can be observed from both hemispheres of the Earth, thanks to its practically equatorial position: the object reaches almost the same height in the sky from every pair of opposite latitudes (for example, 30°N and 30°S), so no hemisphere is particularly favored over the other for its observation.[3] The best time to spot it in the evening sky is between April and September. Its distance from Earth is estimated to be about 24,500 light-years!
Shooting data:
I photographed it on several nights from June 11th to July 14th from my home terrace, but the integration time was very short: only 2 hours 8 minutes 20 seconds.
• GSO 154/600 Newtonian telescope, ASI 294 MC Pro imaging camera
• 60/240 guide scope, ASI 120 mini camera
• Sky-Watcher HEQ5 SynScan GOTO equatorial mount
• Asiair Pro acquisition, RGB processing with Pixinsight.
Equipment: Nikon D5300, Tamron SP 70-300mm f/4-5.6 Di VC USD lens, and iOptron Skytracker. Taken at 300mm, f/8.0, ISO 8000, 48 frames of 30 seconds each plus 30 darks. Stacked in Regim and cropped/processed in Lightroom.
M-15 A Globular star cluster
Done with a Meade 7 inch F9 APO Refracting Telescope and a Nikon D-50 DSLR @ Prime focus using a Lumicon nebula filter and converted to B&W, 5 minute exposure.
My favorite object, really. Taken with an 80mm refractor and Nikon D7000. Various exposures merged in HDR software to tease out some core detail.
26min exposure, 2min subs, just after the moon set below the horizon.
Messier 92 (also known as M92 or NGC 6341) is a globular cluster in the constellation Hercules. It was discovered by Johann Elert Bode in 1777 and independently rediscovered by Charles Messier on March 18, 1781. M92 is at a distance of about 26,000 light-years away from Earth.
Skywatcher Explorer 190 MN Pro telescope,Skywatcher EQ6 Pro mount., Scopos 80mm guide scope. Starlight Xpress SXV M25C camera, SX Lodestar guide camera, Astronomik CLS light pollution filter. Processed and aquired using Maxim DL5, Photoshop CS2.
Edited Hubble Space Telescope image of the blobby galaxy NGC 4874.
Original caption: In this NASA/ESA Hubble Space Telescope image, NGC 4874 is the brightest object, located to the right of the frame and seen as a bright star-like core surrounded by a hazy halo. A few of the other galaxies of the cluster are also visible, looking like flying saucers dancing around NGC 4874. But the really remarkable feature of this image is the point-like objects around NGC 4874, revealed on a closer look: almost all of them are clusters of stars that belong to the galaxy. Each of these globular star clusters contains many hundreds of thousands of stars. Recently, astronomers discovered that a few of these point-like objects are not star clusters but ultra-compact dwarf galaxies, also under the gravitational influence of NGC 4874. Being only about 200 light-years across and mostly made up of old stars, these galaxies resemble brighter and larger versions of globular clusters. They are thought to be the cores of small elliptical galaxies that, due to the violent interactions with other galaxies in the cluster, lost their gas and surrounding stars. This Hubble image also shows many more distant galaxies that do not belong to the cluster, seen as small smudges in the background. While the galaxies in the Coma Cluster are located about 350 million light-years away, these other objects are much further out. Their light took several hundred million to billions of years to reach us. Most unusually, the image also shows a very faint blue satellite trail, extending across the whole image, from the upper left corner of the frame to the lower right. Because Hubble’s cameras can only see a tiny part of the sky at one time, such trails are very rare. This picture was created from optical and near-infrared exposures taken with the Wide Field Channel of Hubble’s Advanced Camera for Surveys. The field of view is 3.3 arcminutes across.
Messier 56 (also known as M56 or NGC 6779) is a globular cluster in the constellation Lyra. It was discovered by Charles Messier in 1779. M56 is at a distance of about 32,900 light-years from Earth and measures roughly 84 light-years across.
LRGB, 40-20-20-20, 2 min subs. Meade RCX400 12 inch Telescope, SXVF H9 Camera, SXV Adaptive Optics, Atik motorised Filter wheel, Astronomik Filters. Processed and aquired Maxim DL5, Photoshop CS2, Noel Carboni'sPhotoshop Actions. Seeing poor misty. 27-09-08 Harrold Observatory, Bedfordshire, UK.
M15 as seen in mid-July 2012.
This is a stack of 15 10 minute subs at 400 ISO using the modified Pentax K10D camera. Used the 127mm F12 Maksutov Cassegrain to get the high magnification. This was part of a long series of practice runs prior to GSSP to tune the GM8 mount and my processes for imaging.
Calibrated the data using Maxim - although I see there are some strange star colors so I may revisit. Then stacked in DSS and did processing in Pix Insight: DBE, Masked Stretch, Curves, MT, color calibration, and ATrous Wavelet to reduce noise and increase sharpness. Exported to LR3 for final touches.
Here's the output of the plate solve:
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
+0.000010814366 +0.000211773925 -0.257702262442
-0.000211759441 +0.000010766976 +0.285723153957
+0.000000000000 +0.000000000000 +1.000000000000
Resolution ........ 0.763 arcsec/pix
Rotation .......... -92.919 deg
Focal ............. 1459.14 mm
Pixel size ........ 5.40 um
Field of view ..... 35' 48.8" x 29' 8.1"
Image center ...... RA: 21 29 58.182 Dec: +12 09 59.81
Image bounds:
top-left ....... RA: 21 28 54.844 Dec: +12 27 07.95
top-right ...... RA: 21 29 02.452 Dec: +11 51 22.12
bottom-left .... RA: 21 30 54.042 Dec: +12 28 36.81
bottom-right ... RA: 21 31 01.383 Dec: +11 52 50.78
M92 is one of the brightest globular clusters in the Milky Way -barely visible to the naked eye under ideal conditions. It is also one of the oldest ones, having formed only a few hundred million years after the Big Bang.
This image was taken 7-23-22 with the 1m Jacobus Kapteyn Telescope at the Roque de los Muchachos Observatory on La Palma in the Canary Islands, Spain. The image was taken just as the sky got dark to focus the telescope. Therefore, the sky background is a bit brighter than it should be.
It consists of four 15 x 6 seconds exposures each in RGB and 15 x 2 second exposures in luminance.
NGC 6535
Globular cluster with low concentration of stars
Source: Hubble Legacy Archive
HST_10775_35_ACS_WFC_F606W
HST_10775_35_ACS_WFC_F814W
Color composite image of M30 taken with the .8 meter telescope at Florida Tech. In this image North is up and East is to the left.
This is the first color photo I have ever made using this set up so I am sure there is a bit of a learning curve here for me.
Image Info
L- 50 20sec
G- 22 45sec
B- 1 50sec
R- 36 25sec
FLI camera 1024x1024
CCD Temp -30C
I already know that I have to make all the exposures longer next time. I only realized this after I had moved off this object and had read up on this online. There is only one image for the B filter because for some reason the stacking program I used found only 2 stars in those images.
Part of the problem is that when taking the pictures in Maxim DL the images appear fine so I don't think of having to increase the exposure time.
Maxim DL was used to take the image, Deep Sky Stacker was used to stack them, and there was further editing done in Photoshop.
Edited Hubble Space Telescope image of globular cluster M62. Color/processing variant.
Image source: www.nasa.gov/feature/goddard/2018/messier-62
See also: www.flickr.com/photos/nasahubble/sets/72157687169041265
Original caption: M62 is known for being one of the most irregularly shaped globular clusters in our galaxy. This might be because it is one of the closest globular clusters to the center of our galaxy and is affected by galactic tidal forces, displacing many of the cluster’s stars toward the southeast.
M62 has an extremely dense core of 150,000 stars. In 2007, astronomers discovered a stellar-mass black hole in M62, one of the first to ever be found in a globular cluster. According to observations from NASA’s Chandra X-ray Observatory, M62 also contains a large number of X-ray binaries, which formed in close encounters between stars in the cluster.
This Hubble observation was taken in ultraviolet and visible light using the Advanced Camera for Surveys and Wide Field Camera 3. Most of the globular cluster is featured in this observation, with the core focused toward the top right. Hubble made these observations to help astronomers study the characteristics of globular clusters, measure the mass of M62’s black hole, and help determine the formation and evolution of cluster binaries.
Charles Messier discovered M62 in 1771. The globular cluster is almost 12 billion years old. M62 has a magnitude of 6.6 and is located in the constellation Ophiuchus, approximately 22,200 light-years away from Earth. Best observed in July, the cluster is easily found southeast of the bright star Antares and can be seen as a hazy patch with binoculars. Small telescopes reveal a comet-like shape, while telescopes 8 inches or larger will resolve more stars.
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Photographed from Boomerang Beach, NSW, Australia
Edited Hubble Space Telescope image of galaxies in the Coma Cluster of galaxies. Geometric variant.
Image source: hubblesite.org/image/4269/news_release/2018-44
Original caption: This is a Hubble Space Telescope mosaic of a portion of the immense Coma cluster of over 1,000 galaxies, located 300 million light-years from Earth. Hubble's incredible sharpness was used to do a comprehensive census of the cluster's most diminutive members: a whopping 22,426 globular star clusters. Among the earliest homesteaders of the universe, globular star clusters are snow-globe-shaped islands of several hundred thousand ancient stars. The survey found the globular clusters scattered in the space between the galaxies. They have been orphaned from their home galaxies through galaxy tidal interactions within the bustling cluster. Astronomers will use the globular cluster field for mapping the distribution of matter and dark matter in the Coma galaxy cluster.
Tags
Galaxy Clusters, Globular Clusters, Hubble Telescope, Observations
Credits
NASA, ESA, J. Mack (STScI), and J. Madrid (Australian Telescope National Facility)