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The subject of this week's Hubble Picture of the Week is a reflection nebula, identified as GN 04.32.8. Reflection nebulae are clouds of dust in space that don't emit their own light, as other nebulae do. Instead, the light from nearby stars hits and scatters off their dust, lighting them up. Because of the way the light scatters, many reflection nebulae tend to appear blue, GN 04.32.8 included.
GN 04.32.8 is a small part of the stellar nursery known as the Taurus Molecular Cloud. At only roughly 480 light-years from Earth in the constellation Taurus, it's one of the best locations for studying newly forming stars. This reflection nebula is illuminated by the system of three bright stars in the centre of this image, mainly the variable star V1025 Tauri in the very centre. One of those stars overlaps with part of the nebula: this is another variable star that is named HP Tauri, but is classified as a T Tauri star, for its similarity to yet another variable star elsewhere in the Taurus Molecular Complex. T Tauri stars are very active, chaotic stars at an early stage of their evolution, so it's no surprise that they appear in a prolific stellar nursery like this one! The three stars are also named HP Tau, HP Tau G2 and HP Tau G3; they’re believed to be gravitationally bound to each other, forming a triple system.
Eagle-eyed viewers might notice the small, squashed, orange spot, just left of centre below the clouds of the nebula, that’s crossed by a dark line. This is a newly-formed protostar, hidden in a protoplanetary disc that obstructs some of its light. Because the disc is edge-on to us, it’s an ideal candidate for study. Astronomers are using Hubble here to examine it closely, seeking to learn about the kinds of exoplanets that might be formed in discs like it.
[Image Description: A long, smoky, greyish-blue cloud in the centre of the image curves in an arc around three bright stars, each with long cross-shaped diffraction spikes. The cloud is lit more brightly on the inner side facing the stars, and fades into the dark background on the outer side. A few other stars and points of light surround the cloud: one small star below it has a dark band crossing its centre.]
Credits: ESA/Hubble & NASA, G. Duchêne; CC BY 4.0
Visited the De Young yesterday. Always love watching people react to art.
Rainy Season in the Tropics, 1866
Frederic Edwin Church
Today is day 262 of Project 365
Spotted this guy looking through the window last night, casing the joint I guess. Please don't comment on the smudgy window.
Today is day 133 of Project 365 (Thursday).
James looks out from behind Seljalandsfoss, a huge waterfall that has a trail going behind it. Again on the south coast, one of our cloudier days. He has a ghost image reflected on the water.
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Model : Sébastien
Christine Lebrasseur - Photographe
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. If you wish to license them for commercial purposes, want to purchase prints or are interested in commissioning me to take photos, please send me a Flickr mail or visit my website, www.memoriesbymike.zenfolio.com/, for contact information. Thanks.]
I took this shot at the hypocenter of the nuclear blast in Hiroshima, which is the surface location directly below the nuclear explosion.
On Monday, August 6, 1945, at 8:15 a.m., the nuclear weapon "Little Boy" was dropped on Hiroshima from the Enola Gay, and detonated approximately 600m directly above this exact spot, immediately killing at least 70,000 and destroying 70% of the city's buildings. In short, with a vanishingly small number of exceptions, anybody standing within 3/4 kilometer of where I was standing ceased to exist instantaneously. Of course the casualty numbers expanded dramatically over the coming days, and indeed months.
Truth be told, I'm not a bleeding heart, and can understand those who rationalize the necessity of this event, as much as those who believe it is an inexcusable horror that should never have happened. It did happen though, and the consequences were real and undeniable, and still can be felt when you stand in a place such as this. If you have the means and opportunity to visit Hiroshima sometime in your life, do.
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Model : Model : Anaelle
Christine Lebrasseur - Photographe
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In anticipation of the upcoming 35th anniversary of the NASA/ESA Hubble Space Telescope, ESA/Hubble is continuing the celebrations with a new image of the Sombrero Galaxy, also known as Messier 104. An eye-catching target for Hubble and a favourite of amateur astronomers, the enigmatic Sombrero Galaxy has features of both spiral and elliptical galaxies. This image incorporates new processing techniques that highlight the unique structure of this galaxy.
As part of ESA/Hubble’s 35th anniversary celebrations, a new image series is being shared to revisit stunning Hubble targets that were previously released. First, a new image of NGC 346 was published. Now, ESA/Hubble is revisiting a fan-favourite galaxy with new image processing techniques. The new image reveals finer detail in the galaxy’s disc, as well as more background stars and galaxies.
Several Hubble images of the Sombrero Galaxy have been released over the past two decades, including this well-known Hubble image from October 2003. In November 2024, the NASA/ESA/CSA James Webb Space Telescope also gave an entirely new perspective on this striking galaxy.
Located around 30 million light-years away in the constellation Virgo, the Sombrero Galaxy is instantly recognisable. Viewed nearly edge on, the galaxy’s softly luminous bulge and sharply outlined disc resemble the rounded crown and broad brim of the Mexican hat from which the galaxy gets its name.
Though the Sombrero Galaxy is packed with stars, it’s surprisingly not a hotbed of star formation. Less than one solar mass of gas is converted into stars within the knotted, dusty disc of the galaxy each year. Even the galaxy’s central supermassive black hole, which at 9 billion solar masses is more than 2000 times more massive than the Milky Way’s central black hole, is fairly calm.
The galaxy is too faint to be spotted with unaided vision, but it is readily viewable with a modest amateur telescope. Seen from Earth, the galaxy spans a distance equivalent to roughly one third of the diameter of the full Moon. The galaxy’s size on the sky is too large to fit within Hubble’s narrow field of view, so this image is actually a mosaic of several images stitched together.
One of the things that makes this galaxy especially notable is its viewing angle, which is inclined just six degrees off of the galaxy’s equator. From this vantage point, intricate clumps and strands of dust stand out against the brilliant white galactic nucleus and bulge, creating an effect not unlike Saturn and its rings – but on an epic galactic scale.
[Image description: The Sombrero Galaxy is an oblong, pale white disc with a glowing core. It appears nearly edge-on but is slanted slightly in the front, presenting a slightly top-down view of the inner region of the galaxy and its bright core. The outer disc is darker with shades of brown and black. Different coloured distant galaxies and various stars are speckled among the black background of space surrounding the galaxy.]
Credits: ESA/Hubble & NASA, K. Noll; CC BY 4.0
An onion dome (Russian: луковичная глава, lúkovichnaya glava; compare Russian: лук, luk, "onion") is a dome whose shape resembles an onion. Such domes are often larger in diameter than the drum upon which they sit, and their height usually exceeds their width. These bulbous structures taper smoothly to a point.
It is the predominant form for church domes in [Russia] (mostly on Russian Orthodox churches) and in Bavaria, Germany (German: Zwiebelturm (literally "onion tower"), plural: Zwiebeltürme, mostly on Catholic churches), but can also be found regularly across Austria, northeastern Italy, Eastern Europe, Mughal India, the Middle East and Central Asia. (source-Wikipedia)
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This image and many more from my Photostream are shared under Creative Commons licence. Author: Salva Barbera. You can use this image on websites, blogs or other media projects without my permission as long as you credit me as the Author. My images may not be used for any profane or immoral purpose or to incite violence or hatred. Please read the Creative Commons image licence guidelines before downloading. A link back to my Flickr account is not mandatory but highly appreciated.
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With a focus on health care and the environment, thousands protest on the streets of Philadelphia during a visit by U.S. President Trump to a downtown Republican Party legislative retreat on January 26, 2017.
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Philippines License.
Today’s NASA/ESA Hubble Space Telescope Picture of the Week features the glorious spiral galaxy NGC 5643, which is located roughly 40 million light-years away in the constellation Lupus. NGC 5643 is what’s known as a grand design spiral, referring to how the galaxy’s two large, winding spiral arms are clear to see. The spiral arms are defined by bright blue stars, lacy reddish-brown dust clouds and pink star-forming regions.
As fascinating as the galaxy appears at visible wavelengths, some of NGC 5643’s most interesting features are invisible to the human eye. Ultraviolet and X-ray images and spectra of NGC 5643 show that the galaxy hosts an active galactic nucleus: an especially bright galactic core powered by a feasting supermassive black hole. When a supermassive black hole ensnares gas from its surroundings, the gas collects in a disc that heats up to hundreds of thousands of degrees. The superheated gas shines brightly across the electromagnetic spectrum, but especially at X-ray wavelengths.
NGC 5643’s active galactic nucleus isn’t the brightest source of X-rays in the galaxy, though. Researchers using ESA’s XMM-Newton discovered an even brighter X-ray-emitting object, called NGC 5643 X-1, on the galaxy’s outskirts. What could be a more powerful source of X-rays than a supermassive black hole? Surprisingly, the answer appears to be a much smaller black hole! While the exact identity of NGC 5643 X-1 is not yet known, evidence points to a black hole that is about 30 times more massive than the Sun. Locked in an orbital dance with a companion star, the black hole ensnares gas from its stellar companion, creating a superheated disc that outshines the galactic centre.
NGC 5643 was also the subject of a previous Picture of the Week. The new image incorporates additional wavelengths of light, including the red color that is characteristic of gas heated by massive young stars.
[Image Description: A close-up of a spiral galaxy, seen face-on. Its center is a bright white point, surrounded by a large yellowish oval with thin lines of dust swirling in it. From the sides of the oval emerge two bright spiral arms which wind through the round disc of the galaxy, filled with shining pink spots where stars are forming and more dark reddish dust. Many stars can be seen in the foreground, over and around the galaxy.]
Credits: ESA/Hubble & NASA, A. Riess, D. Thilker, D. De Martin (ESA/Hubble), M. Zamani (ESA/Hubble); CC BY 4.0
This image shows a globular cluster known as NGC 1651. Like the object in another recent Picture of the Week, it is located about 162 000 light-years away in the largest and brightest of the Milky Way’s satellite galaxies, the Large Magellanic Cloud (LMC). A notable feature of this image is that the globular cluster almost fills the entire image, even though globular clusters are only about 10 to 300 light-years in diameter (NGC 1651 has a diameter of roughly 120 light-years). In contrast, there are numerous Hubble Pictures of the Week that feature entire galaxies — which can be tens or hundreds of millions of light-years in diameter — that also more or less fill the whole image.
A common misconception is that Hubble and other large telescopes manage to observe wildly differently sized celestial objects by zooming in on them, as one would with a specialised camera here on Earth. However, whilst small telescopes might have the option to zoom in and out to a certain extent, large telescopes do not. Each telescope’s instrument has a fixed ‘field of view’ (the size of the region of sky that it can observe in a single observation). For example, the ultraviolet/visible light channel of Hubble’s Wide Field Camera 3 (WFC3), the channel and instrument that were used to collect the data used in this image, has a field of view roughly one twelfth the diameter of the Moon as seen from Earth. Whenever WFC3 makes an observation, that is the size of the region of sky that it can observe.
The reason that Hubble can observe objects of such wildly different sizes is two-fold. Firstly, the distance to an object will determine how big it appears to be from Earth, so entire galaxies that are relatively far away might take up the same amount of space in the sky as a globular cluster like NGC 1651 that is relatively close by. In fact, there's a distant spiral galaxy lurking in this image, directly left of the cluster — though undoubtedly much larger than this star cluster, it appears small enough here to blend in with foreground stars! Secondly, multiple images spanning different parts of the sky can be mosaiced together to create single images of objects that are too big for Hubble’s field of view. This is a very complex task and is not typically done for Pictures of the Week, but it has been done for some of Hubble’s most iconic images.
[Image Description: A spherical collection of stars, which fills the whole view. The stars merge into a bright, bluish core in the centre, and form a sparse band around that out to the edges of the image. A few stars lie in front of the cluster, with visible diffraction spikes. The background is dark black.]
Credits: ESA/Hubble & NASA, L. Girardi, F. Niederhofer; CC BY 4.0
Today’s ESA/Hubble Picture of the Week features the spiral galaxy NGC 4535, which is situated about 50 million light-years away in the constellation Virgo (The Maiden). This galaxy has been nicknamed the ‘Lost Galaxy’ because it’s extremely faint when viewed through a small telescope. With a mirror spanning 2.4 metres across, Hubble is well equipped to observe dim galaxies like NGC 4535 and pick out features like its massive spiral arms and central bar of stars.
On full display in this Hubble image are NGC 4535’s young star clusters, which dot the galaxy’s spiral arms. Many of the groupings of bright blue stars are enclosed by glowing pink clouds. These clouds, called H II (‘H-two’) regions, are a sign that the galaxy is home to especially young, hot, and massive stars that are blazing with high-energy radiation. By heating the clouds in which they were born, shooting out powerful stellar winds, and eventually exploding as supernovae, massive stars certainly shake up their surroundings.
This Hubble image incorporates data from an observing programme that will catalogue roughly 50 000 H II regions in nearby star-forming galaxies like NGC 4535. A previous image of NGC 4535 was released in 2021. Both the 2021 image and today’s image incorporate observations from the PHANGS programme, which seeks to understand the connections between young stars and cold gas. Today’s image adds a new dimension to our understanding of NGC 4535 by capturing the brilliant red glow of the nebulae that encircle massive stars in their first few million years of life.
[Image Description: A close-in view of a spiral galaxy that faces the viewer. Brightly lit spiral arms swing outwards through the galaxy’s disc, starting from an elliptical region in the centre. Thick strands of dark reddish dust are spread across the disc, mostly following the spiral arms. The arms also contain many glowing pink-red spots where stars form. The galaxy is a bit fainter beyond the arms, but speckled with blue stars.]
Credits: ESA/Hubble & NASA, F. Belfiore, J. Lee and the PHANGS-HST Team; CC BY 4.0
Raspberry blackout cake. loads of home grown raspberries (red and yellow) in this cake!
And plum jam in the cake mix too.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. If you wish to license them for commercial purposes, want to purchase prints or are interested in commissioning me to take photos, please send me a Flickr mail or visit my website, www.memoriesbymike.zenfolio.com/, for contact information. Thanks.]
Esta imagen está libre de uso.
Si es utilizada me gustaría que me dejaran un comentario con su trabajo.
This image is free.
If used I'd like to leave a comment with your work.
This is how trees should be topped! This osprey was getting buffeted around a bit in the wind, the grainy background was a mizzle falling. So cool to get a bit of time to do some wildlife photography again.
Today is day 198 of Project 365 (Friday).
Taken from under the Seoul tower, South Korea.
The photo is under Creative Commons license, use it as you will, just give credit :-)
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Model : Dominique S
Make-up : Constance Mottez
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The sparkling spiral galaxy gracing this NASA/ESA Hubble Space Telescope Picture of the Week is UGC 5460, which sits about 60 million light-years away in the constellation Ursa Major. This image combines four different wavelengths of light to reveal UGC 5460’s central bar of stars, winding spiral arms and bright blue star clusters. Also captured in the upper left-hand corner of this image is a far closer object: a star just 577 light-years away in our own galaxy.
UGC 5460 has hosted two recent supernovae named SN 2011ht and SN 2015as. It’s because of these two stellar explosions that Hubble targeted this galaxy, collecting data for three observing programmes that aim to study various kinds of supernovae.
SN 2015as was what’s known as a core-collapse supernova: a cataclysmic explosion that happens when the core of a star far more massive than the Sun runs out of fuel and collapses under its own gravity, initiating a rebound of material outside the core. Hubble observations of SN 2015as will help researchers understand what happens when the expanding shockwave of a supernova collides with the gas that surrounds the exploded star.
SN 2011ht might have been a core-collapse supernova as well, but it could also be an impostor called a luminous blue variable. Luminous blue variables are rare stars that experience eruptions so large that they can mimic supernovae. Crucially, luminous blue variables emerge from these eruptions unscathed, while stars that go supernova do not. Hubble will search for a stellar survivor at SN 2011ht’s location, and the explosion’s identity may be revealed at last.
[Image Description: A spiral galaxy seen close to face-on. The centre of its disc is a bright, pale yellowish oval shape. Spiral arms extend from either side of the oval through the disc on irregular paths. They are marked throughout by bright bluish-white patches of stars. Distant background galaxies appear as small orangish blobs around the spiral galaxy. In the top-left corner a nearby star shines brightly, spikes radiating from it.]
Credits: ESA/Hubble & NASA, W. Jacobson-Galán, A. Filippenko, J. Mauerhan; CC BY 4.0
What kind of astronomical object is this? It doesn’t look quite like the kinds of galaxies, nebulae, star clusters or galaxy clusters which Hubble normally brings us images of. In fact, this is a spiral galaxy, named UGC 10043 — we just happen to be seeing it directly from the side! Located roughly 150 million light-years from Earth in the constellation Serpens, UGC 10043 is one of the somewhat rare spiral galaxies that are seen edge-on.
From this point of view, we see the galaxy’s disc as a sharp line through space, overlain with a prominent dust lane. This dust is spread across the spiral arms of UGC 10043, but it looks very thick and cloudy when viewed from the side. You can even see the lights of some active star-forming regions in the arms, shining out from behind the dust. Strikingly, we can also see that the centre of the galaxy sports a glowing, almost egg-shaped ‘bulge’, rising far above and below the disc. All spiral galaxies have a bulge like this one as part of their structure, containing stars that orbit the galactic centre on paths above and below the whirling disc; it’s a feature that isn’t normally obvious in pictures of galaxies. The unusually large size of this bulge compared to the galaxy’s disc is possibly thanks to UGC 10043 siphoning material from a nearby dwarf galaxy. This may also be why the disc is warped, bending up at one end and down at the other.
Like most of the full-colour Hubble images released by ESA/Hubble, this image is a composite, made up of several individual snapshots taken by Hubble at different times and capturing different wavelengths of light. You can see the exact images used in the sidebar on this page. A notable aspect of this image is that the two sets of Hubble data used were collected 23 years apart, in 2000 and 2023! Hubble’s longevity doesn’t just afford us the ability to produce new and better images of old targets; it also provides a long-term archive of data which only becomes more and more useful to astronomers.
[Image Description: A spiral galaxy seen directly from the side, such that its disc looks like a narrow diagonal band across the image. A band of dark dust covers the disc in the centre most of the way out to the ends, and the disc glows around that. In the centre a whitish circle of light bulges out above and below the disc. The tips of the disc are a bit bent. The background is black and mostly empty.]
Credits: ESA/Hubble & NASA, R. Windhorst, W. Keel; CC BY 4.0
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Model : Nathalie
Make-up : Emmanuelle Legrain
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Locomotoras en Rosario
Antiguos talleres del ferrocarril
Fotografías Ivan Pawluk
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Reconocimiento-NoComercial-SinObraDerivada 3.0 Unported (CC BY-NC-ND 3.0)
PHOTOGRAPHY by Iván Pawluk is licensed under a Creative Commons Reconocimiento-NoComercial-SinObraDerivada 3.0 Unported License.Creado a partir de la obra en www.flickr.com/photos/pawluk/ .Permissions beyond the scope of this license may be available at www.flickr.com/photos/pawluk/ .
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