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The Galaxy Tree
Image Credit & Copyright: César Vega Toledano ; Rollover Annotation: Judy Schmidt
http://apod.nasa.gov/apod/ap150525.html

First came the trees. In the town of Salamanca, Spain, the photographer noticed how distinctive a grove of oak trees looked after being pruned. Next came the galaxy. The photographer stayed up until 2 am, waiting until the Milky Way Galaxy rose above the level of a majestic looking oak. From this carefully chosen perspective, dust lanes in the galaxy appear to be natural continuations to branches of the tree. Last came the light. A flashlight was used on the far side of the tree to project a silhouette. By coincidence, other trees also appeared as similar silhouettes across the relatively bright horizon. The featured image was captured as a single 30-second frame earlier this month and processed to digitally enhance the Milky Way.
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Delphina Reyes's profile photoBarbara Giusti's profile photoLaurie Davis's profile photoJoseph WAP Norton's profile photo
49 comments
 
amazing
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NGC 7822 in Cepheus
Image Credit & Copyright: César Blanco González
http://apod.nasa.gov/apod/ap150523.html

Hot, young stars and cosmic pillars of gas and dust seem to crowd into NGC 7822. At the edge of a giant molecular cloud toward the northern constellation Cepheus, the glowing star forming region lies about 3,000 light-years away. Within the nebula, bright edges and dark shapes are highlighted in this colorful skyscape. The image includes data from narrowband filters, mapping emission from atomic oxygen, hydrogen, and sulfur into blue, green, and red hues. The atomic emission is powered by energetic radiation from the hot stars, whose powerful winds and radiation also sculpt and erode the denser pillar shapes. Stars could still be forming inside the pillars by gravitational collapse, but as the pillars are eroded away, any forming stars will ultimately be cutoff from their reservoir of star stuff. This field spans around 40 light-years at the estimated distance of NGC 7822.
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DIANA SIERRA's profile photoKayla mangeris's profile photoRyszard Zalewski's profile photoДид Вдятоѕ's profile photo
12 comments
 
😄
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NGC 6240: Merging Galaxies
Image Credit: +NASA, +European Space Agency, ESA, Hubble Heritage (STScI / AURA), A. Evans (U. Virginia / NRAO / Stony Brook U.)
http://apod.nasa.gov/apod/ap150521.html

NGC 6240 offers a rare, nearby glimpse of a cosmic catastrophe in its final throes. The titanic galaxy-galaxy collision takes place a mere 400 million light-years away in the constellation Ophiuchus. The merging galaxies spew distorted tidal tails of stars, gas, and dust and undergo fast and furious bursts of star formation. The two supermassive black holes in the original galactic cores will also coalesce into a single, even more massive black hole and soon, only one large galaxy will remain. This dramatic image of the scene is a composite of narrowband and near-infrared to visible broadband data from Hubble's ACS and WPC3 cameras, a view that spans over 300,000 light-years at the estimated distance of NGC 6240.
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‫امل الزدجالي‬‎'s profile photoPaulina Maldonado's profile photoWiktor K's profile photoDIANA SIERRA's profile photo
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Spectacular
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Globular Star Cluster 47 Tuc
Image Credit: +NASA, +European Space Agency, ESA, Hubble Heritage Team (STScI / AURA) Acknowledgment: J. Mack (STScI) and G. Piotto (U. Padova)
http://apod.nasa.gov/apod/ap150519.html

Globular star cluster 47 Tucanae is a jewel box of the southern sky. Also known as NGC 104, it roams the halo of our Milky Way Galaxy along with over 150 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet Earth, 47 Tuc lies about 17,000 light-years away and can be spotted naked-eye near the Small Magellanic Cloud in the constellation of the Toucan. The dense cluster is made up of hundreds of thousands of stars in a volume only about 120 light-years across. Recent observations have shown that 47 Tuc's white dwarf stars are in the process of being gravitationally expelled to the outer parts of the cluster due to their relatively low mass. Other colorful low mass stars including yellowish red giant stars are easy to pick out on the outskirts of the cluster in this recently released sharp telescopic portrait by the Hubble Space Telescope.
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Angelos Papadopoulos's profile photoValerie Redden's profile photoKayla mangeris's profile photoPaulo Apol oliveira's profile photo
22 comments
 
en medio de toda esta perfeccion y belleza lo unico que puede darnos algo de existencia es la conciencia de todo ello...ser el que puede admirarlo y evaluarlo y ser ello mismo
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NGC 2440: Pearl of a New White Dwarf
Image Credit: H. Bond (STScI), R. Ciardullo (PSU), WFPC2, HST, +NASA; Processing: Forrest Hamilton
http://apod.nasa.gov/apod/ap150517.html

Like a pearl, a white dwarf star shines best after being freed from its shell. In this analogy, however, the Sun would be a mollusk and its discarded hull would shine prettiest of all! In the above shell of gas and dust, the planetary nebula designated NGC 2440, contains one of the hottest white dwarf stars known. The glowing stellar pearl can be seen as the bright dot near the image center. The portion of NGC 2440 shown spans about one light year. The center of our Sun will eventually become a white dwarf, but not for another five billion years. The above false color image was captured by the Hubble Space Telescope in 1995. NGC 2440 lies about 4,000 light years distant toward the southern constellation Puppis.
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Valerie Redden's profile photoKayla mangeris's profile photoPaulo Apol oliveira's profile photoAeroscope's profile photo
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s kate
 
:)
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Dwarf Planet, Bright Spot
Image Credit: +NASA, +NASA Jet Propulsion Laboratory-Caltech, UCLA, MPS/DLR/IDA
http://apod.nasa.gov/apod/ap150514.html

Now at Ceres, Dawn's camera recorded this closer view of the dwarf planet's northern hemisphere and one of its mysterious bright spots on May 4. A sunlit portrait of a small, dark world about 950 kilometers in diameter, the image is part of a planned sequence taken from the solar-powered spacecraft's 15-day long RC3 mapping orbit at a distance of 13,600 kilometers (8,400 miles). The animated sequence shows Ceres' rotation, its north pole at the top of the frame. Imaged by Hubble in 2004 and then by Dawn as it approached Ceres in 2015, the bright spot itself is revealed to be made up of smaller spots of reflective material that could be exposed ice glinting in the sunlight. On Saturday, Dawn's ion propulsion system was turned on to spiral the spacecraft into a closer 4,350-kilometer orbit by June 6. Of course another unexplored dwarf planet, Pluto, is expecting the arrival of a visitor from Earth, the New Horizons spacecraft, by mid-July.
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Jeannie P Carlson's profile photoKaren  guyette's profile photoToday's Memory's profile photoFatima ferreira carneiro's profile photo
32 comments
 
These must be really big structures, to be so prominent. 
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Have them in circles
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Space Shuttle Rising
Image Credit: +NASA
http://apod.nasa.gov/apod/ap150524.html

What's that rising from the clouds? The space shuttle. Sometimes, if you looked out the window of an airplane at just the right place and time, you could have seen something very unusual -- a space shuttle launching to orbit. Images of the rising shuttle and its plume became widely circulated over the web shortly after Endeavour's final launch in 2011 May. The above image was taken from a shuttle training aircraft by NASA and is not copyrighted. Taken well above the clouds, the image can be matched with similar images of the same shuttle plume taken below the clouds. Hot glowing gasses expelled by the engines are visible near the rising shuttle, as well as a long smoke plume. A shadow of the plume appears on the cloud deck, indicating the direction of the Sun. The US Space Shuttle program concluded in 2011, and Endeavour can now be visited at the California Science Center.
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Bryan Menominee's profile photoMichael Jäkel's profile photoJames Rea's profile photoAlex Q's profile photo
22 comments
 
An amazing pic.
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A Dark and Dusty Sky
Image Credit & Copyright: Scott Rosen
http://apod.nasa.gov/apod/ap150522.html

In the dusty sky toward the constellation Taurus and the Orion Arm of our Milky Way Galaxy, this broad mosaic follows dark and faint reflection nebulae along the region's fertile molecular cloud. The six degree wide field of view starts with long dark nebula LDN 1495 stretching from the lower left, and extends beyond the (upside down) bird-like visage of the Baby Eagle Nebula, LBN 777, at lower right. Small bluish reflection nebulae surround scattered fainter Taurus stars, sights often skipped over in favor of the constellation's better known, brighter celestial spectacles. Associated with the young, variable star RY Tau, the yellowish nebula VdB 27 is toward the upper left. Only 400 light-years or so distant, the Taurus molecular cloud is one of the closest regions of low-mass star formation. At that distance this dark vista would span over 40 light-years.
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Ronald Brown's profile photoGoldy Rajput's profile photoGiovana Magalhães's profile photoSherry Fé's profile photo
16 comments
 
Bright cities...earth at night a billion miles away
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A Cliff Looming on Comet 67P
Image Credit & Licence: +European Space Agency, ESA, Rosetta, NAVCAM
http://apod.nasa.gov/apod/ap150520.html

What that looming behind this gravel-strewn hill on Comet Churyumov–Gerasimenko? A jagged cliff. The unusual double-lobed nucleus of Comet 67P/Churyumov–Gerasimenko lends itself to unusual and dramatic vistas, another of which has been captured by the Rosetta spacecraft that arrived at the comet last September. The featured cometscape, taken last October and digitally enhanced, spans about 850 meters across. Meanwhile, Comet Churyumov–Gerasimenko continues to sprout jets as it nears its closest approach to the Sun in August. Along the way, Rosetta will continue listening for signals from Philae, a probe that landed on the nucleus but rebounded to an unknown surface location last November. If newly exposed to sunlight, Philae might regain enough energy to again signal Rosetta.
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Paulo Apol oliveira's profile photoСветлана «Flesh Atronach» Атронах's profile photoPaulina Maldonado's profile photoDIANA SIERRA's profile photo
9 comments
 
Amazing
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Auroras and Star Trails over Iceland
Image Credit & Copyright: Vincent Brady
http://apod.nasa.gov/apod/ap150518.html

It was one of the quietest nights of aurora in weeks. Even so, in northern- Iceland during last November, faint auroras lit up the sky every clear night. The featured 360-degree panorama is the digital fusion of four wide-angle cameras each simultaneously taking 101 shots over 42 minutes. In the foreground is serene Lake Myvatn dotted with picturesque rock formations left over from ancient lava flows. Low green auroras sweep across the sky above showing impressive complexity near the horizon. Stars far in the distance appear to show unusual trails -- as the Earth turned -- because early exposures were artificially faded.
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Rob Goodson's profile photoJen Patrick's profile photoCraig Hathaway's profile photorajeshwari lakshmi's profile photo
50 comments
 
we look for somethings existing on earth , and also in the sky .
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Ares 3 Landing Site: The Martian Revisited
Image Credit: HiRISE, MRO, LPL (U. Arizona), +NASA
http://apod.nasa.gov/apod/ap150516.html

This close-up from the Mars Reconnaissance Orbiter's HiRISE camera shows weathered craters and windblown deposits in southern Acidalia Planitia. A striking shade of blue in standard HiRISE image colors, to the human eye the area would probably look grey or a little reddish. But human eyes have not gazed across this terrain, unless you count the eyes of NASA astronauts in the scifi novel The Martian by Andy Weir. The novel chronicles the adventures of Mark Watney, an astronaut stranded at the fictional Mars mission Ares 3 landing site corresponding to the coordinates of this cropped HiRISE frame. For scale Watney's 6-meter-diameter habitat at the site would be about 1/10th the diameter of the large crater. Of course, the Ares 3 landing coordinates are only about 800 kilometers north of the (real life) Carl Sagan Memorial Station, the 1997 Pathfinder landing site.
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patrick clement's profile photoLuis Allbritton's profile photoGloria de Fátima Fernandes Lima's profile photorajeshwari lakshmi's profile photo
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Very interesting. 
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Jupiter, Ganymede, Great Red Spot
Image Credit & Copyright: Damian Peach/SEN
http://apod.nasa.gov/apod/ap150515.html

In this sharp snapshot, the Solar System's largest moon Ganymede poses next to Jupiter, the largest planet. Captured on March 10 with a small telescope from our fair planet Earth, the scene also includes Jupiter's Great Red Spot, the Solar System's largest storm. In fact, Ganymede is about 5,260 kilometers in diameter. That beats out all three of its other fellow Galilean satellites, along with Saturn's Moon Titan at 5,150 kilometers and Earth's own Moon at 3,480 kilometers. Though its been shrinking lately, the Great Red Spot's diameter is still around 16,500 kilometers. Jupiter, the Solar System's ruling gas giant, is about 143,000 kilometers in diameter at its equator. That's nearly 10 percent the diameter of the Sun.
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Cindy Abbott's profile photoKayla mangeris's profile photoPamela Bunting's profile photorajeshwari lakshmi's profile photo
15 comments
 
So beautiful. 
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Story
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Discover the cosmos!
Introduction
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.