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Just in time for the festive season, this new Picture of the Week from the NASA/ESA Hubble Space Telescope features a glistening scene in holiday red. This image shows a small region of the well-known nebula Westerhout 5, which lies about 7000 light-years from Earth. Suffused with bright red light, this luminous image hosts a variety of interesting features, including a free-floating Evaporating Gaseous Globule (frEGG). The frEGG in this image is the small tadpole-shaped dark region in the upper centre-left. This buoyant-looking bubble is lumbered with two rather uninspiring names — [KAG2008] globule 13 and J025838.6+604259.
FrEGGs are a particular class of Evaporating Gaseous Globules (EGGs). Both frEGGs and EGGs are regions of gas that are sufficiently dense that they photoevaporate less easily than the less compact gas surrounding them. Photoevaporation occurs when gas is ionised and dispersed away by an intense source of radiation — typically young, hot stars releasing vast amounts of ultraviolet light. EGGs were only identified fairly recently, most notably at the tips of the Pillars of Creation, which were captured by Hubble in iconic images released in 1995. FrEGGs were classified even more recently, and are distinguished from EGGs by being detached and having a distinct ‘head-tail’ shape. FrEGGs and EGGs are of particular interest because their density makes it more difficult for intense UV radiation, found in regions rich in young stars, to penetrate them. Their relative opacity means that the gas within them is protected from ionisation and photoevaporation. This is thought to be important for the formation of protostars, and it is predicted that many FrEGGs and EGGs will play host to the birth of new stars.
The frEGG in this image is a dark spot in the sea of red light. The red colour is caused by a particular type of light emission known as H-alpha emission. This occurs when a very energetic electron within a hydrogen atom loses a set amount of its energy, causing the electron to become less energetic and this distinctive red light to be released.
[Image description: The background is filled with bright orange-red clouds of varying density. Towards the top-left several large, pale blue stars with prominent cross-shaped spikes are scattered. A small, tadpole-shaped dark patch floats near one of these stars. More of the same dark, dense gas fills the lower-right, resembling black smoke. A bright yellow star and a smaller blue star shine in front of this.]
Credits: ESA/Hubble & NASA, R. Sahai; CC BY 4.0
The workhorse of the military during World War II and beyond.
Airborne Museum in St Mere Eglise, Normandy, France.
The lazily winding spiral arms of the spectacular galaxy NGC 976 fill the frame of this image from the NASA/ESA Hubble Space Telescope. This spiral galaxy lies around 150 million light-years from the Milky Way in the constellation Aries. Despite its tranquil appearance, NGC 976 has played host to one of the most violent astronomical phenomena known — a supernova explosion. These cataclysmicly violent events take place at the end of the lives of massive stars, and can outshine entire galaxies for a short period. While supernovae mark the deaths of massive stars, they are also responsible for the creation of heavy elements that are incorporated into later generations of stars and planets.
Supernovae are also a useful aid for astronomers who measure the distances to faraway galaxies. The amount of energy thrown out into space by supernova explosions is very uniform, allowing astronomers to estimate their distances from how bright they appear to be when viewed from Earth. This image — which was created using data from Hubble’s Wide Field Camera 3 — comes from a large collection of Hubble observations of nearby galaxies which host supernovae as well as a pulsating class of stars known as Cepheid variables. Both Cepheids and supernovae are used to measure astronomical distances, and galaxies containing both objects provide useful natural laboratories where the two methods can be calibrated against one another.
Credits: ESA/Hubble & NASA, D. Jones, A. Riess et al.; CC BY 4.0
The tranquil spiral galaxy UGC 12295 basks leisurely in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies around 192 million light-years away in the constellation Pisces, and is almost face-on when viewed from Earth, displaying a bright central bar and tightly wound spiral arms.
Despite appearing as an island of tranquillity in this image, UGC 12295 played host to a catastrophically violent explosion — a supernova — that was first detected in 2015. This supernova prompted two different teams of astronomers to propose Hubble observations of UGC 12295 that would sift through the wreckage of this vast stellar explosion.
Supernovae are the explosive deaths of massive stars, and are responsible for forging many of the elements found here on Earth. The first team of astronomers used Hubble’s Wide Field Camera 3 (WFC3) to examine the detritus left behind by the supernova in order to better understand the evolution of matter in our Universe.
The second team of astronomers also used WFC3 to explore the aftermath of UGC 12295’s supernova, but their investigation focused on returning to the sites of some of the best-studied nearby supernovae. Hubble’s keen vision can reveal lingering traces of these energetic events, shedding light on the nature of the systems that host supernovae.
[Image Description: A broad spiral galaxy seen directly face-on. It has two bright spiral arms that extend from a bar, which shines from the very centre. Additional fainter arms branch off from these, studded with bright blue patches of star formation. Small, distant galaxies are dotted around it, on a dark background.]
Credits: ESA/Hubble & NASA, A. Filippenko, J. Lyman; CC BY 4.0
The jellyfish galaxy JO175 appears to hang suspended in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies over 650 million light-years from Earth in the appropriately-named constellation Telescopium, and was captured in crystal-clear detail by Hubble’s Wide Field Camera 3. A handful of more distant galaxies are lurking throughout the scene, and a bright four-pointed star lies to the lower right side.
Jellyfish galaxies get their unusual name from the tendrils of star-forming gas and dust that trail behind them, just like the tentacles of a jellyfish. These bright tendrils contain clumps of star formation and give jellyfish galaxies a particularly striking appearance. Unlike their ocean-dwelling namesakes, jellyfish galaxies make their homes in galaxy clusters, and the pressure of the tenuous superheated plasma that permeates these galaxy clusters is what draws out the jellyfish galaxies’ distinctive tendrils.
Hubble recently completed a deep dive into jellyfish clusters, specifically the star-forming clumps of gas and dust that stud their tendrils. By studying the origins and fate of the stars in these clumps, astronomers hoped to better understand the processes underpinning star formation elsewhere in the Universe. Interestingly, their research suggests that star formation in the discs of galaxies is similar to star formation in the extreme conditions found in the tendrils of jellyfish galaxies.
[Image Description: A spiral galaxy. Its spiral arms are studded with many pink spots, especially around the top of the galaxy. One arm is sticking out below the galaxy. From it and around the bottom of the galaxy, faint gas streams away, while little gas is visible above the galaxy. The galaxy is quite small in the centre of a dark background, where a few smaller galaxies of various shapes and sizes hang.]
Credits: ESA/Hubble & NASA, M. Gullieuszik and the GASP team; CC BY 4.0
All rights reserved - Tous droits réservés
Christine Lebrasseur - Photographe
French Website / Site en français
Christine Lebrasseur Photo Studio
DNA - Ipernity - YouTube - JPGMag - Facebook
La terre est bleue comme une orange...
La terre est bleue comme une orange
Jamais une erreur les mots ne mentent pas
Ils ne vous donnent plus à chanter
Au tour des baisers de s’entendre
Les fous et les amours
Elle sa bouche d’alliance
Tous les secrets tous les sourires
Et quels vêtements d’indulgence
À la croire toute nue.
Les guêpes fleurissent vert
L’aube se passe autour du cou
Un collier de fenêtres
Des ailes couvrent les feuilles
Tu as toutes les joies solaires
Tout le soleil sur la terre
Sur les chemins de ta beauté.
[Paul ELUARD] - L'Amour la poésie - (1929)
Kindly gifted by jef safi
All rights reserved - Tous droits réservés
Place : Granville, Normandy, France
Christine Lebrasseur - Photographe
French Website / Site en français
Christine Lebrasseur Photo Studio on Facebook
DNA - Ipernity - YouTube - JPGMag - Facebook Page
Especially lazy this morning, the sun's got up before me. A view from the bedroom window.
Today is day 170 of Project 365 (Saturday).
Another shot of the Lake Berryessa Glory Hole. My timing sucked, with the hole-side of the valley in shadow.
Other pic here, which gives a better sense of scale. Link. The drop is over 200 feet, over 60 meters straight down, the diameter is 72 feet or about 22 meters. Somebody has of course fallen in, and needless to say, perished.
Lake Berryessa is artificial, a flooded valley. Somewhere deep under there was once the town of Monticello. As well as forcibly moving the residents, they also moved a cemetery, which was relocated to the banks for the lake.
Today is day 276 of Project 365
This is a Blue Dasher, I think I read somewhere, the most common dragonfly in North America. They love slow moving water and so, no surprise they were in abundance on the bayous of Louisiana.
One for Macro Monday.
Lines have been drawn in the fungal community, with some choosing to join the dark side.
105mm, f/5.6, 1/1000, iso100
An astonishing moment, I was standing still under a tree, and then had an egret walk right up beside me, stare at me for a bit and then walk on past.
The branches are a lot barer after our wind and rain. This is one of our deciduous oak trees, with evergreen oaks behind to both the left and right.
Today is day 145 of Project 365 (Tuesday).
All my images are Creative Commons, so they are free to use with attribution. Here's one of my photos being used by a Youtube Music channel.
Cette création par Tim Manteau est mise à disposition selon les termes de la licence Creative Commons Paternité-Pas d'Utilisation Commerciale-Pas de Modification 2.0 France.
L'opéra revisité sur deux roues. Mobs customisées pour une corrida mécanique, au son de guitares endiablées sous les "olés" de la foule.
Zermatt, it's a pleasant town, but seriously they need to sort out all the traffic!!! This was base camp to getting up closer to the Matterhorn. I warned you all that I would be posting more gratuitous Matterhorn images!!! This is from a couple of weeks ago in Switzerland.
The whole traffic thing is a joke of course. Zermatt is actually combustion engine free, only electric and "grass-powered" vehicles up here. Which means you can't actually drive here, you need to take the spectacular cogwheel train to get to the village. Steep sections of the railway have cogs to stop the train from slipping backward or going down too quickly.
The horseman's outfit matches the Valais flag, which is the canton that Zermatt is in.
A Western Bluebird dropped by yesterday afternoon. Although they're around, I think this is the first time, I've ever had one at my house.
Dieses Werk von Ukelens ist lizenziert unter einer Creative Commons Namensnennung - Nicht-kommerziell - Weitergabe unter gleichen Bedingungen 4.0 International Lizenz.