The Antennae galaxies, located about 62 million light years from Earth, are shown in this composite image from the Chandra X-ray Observatory (blue), the Hubble Space Telescope (gold), and the Spitzer Space Telescope (red).The collision, which began more than 100 million years ago and is still occurring, has triggered the formation of millions of stars in clouds of dusts and gas in the galaxies. The most massive of these young stars have already sped through their evolution in a few million years and exploded as supernovas.
The newfound failed star, known as a brown dwarf, has been dubbed PZ Tel B. It is separated from its sun-like companion star, PZ Tel A, by a distance similar to that between Uranus and the sun in our solar system.
This NASA Hubble Space Telescope image of the Trifid Nebula reveals a stellar nursery being torn apart by a nearby massive star. Embryonic stars are forming within an ill-fated cloud of dust and gas, which is destined to be eaten away by the glare from the massive neighbor.
This enhanced-color image of the northern hemisphere of Saturn taken by Voyager 1 on November 5, 1980 at a range of 5.5 million miles shows a variety of features in Saturn's clouds. Time-lapse images of cloud features like those shown in this image not only provide information on how these storms evolve with time, but provide a way to measure atmospheric wind speeds.
A physics professor has proposed using a solar sail to confirm a side-effect of Einstein's General Theory of Relativity.
The Cat's Eye Nebula, NGC 6543, located in the constellation of Draco, is seen in this undated image.
What are Saturn's rings made of? In an effort to find out, the robot spacecraft Cassini that entered orbit around Saturn two weeks ago took several detailed images of the area surrounding Saturn's large A ring in ultraviolet light. In the above image, the bluer an area appears, the richer it is in water ice. Conversely, the redder an area appears, the richer it is in some sort of dirt.
A gorgeous full moon is seen rising over Uludag Mountain in Bursa Province, Turkey. This alluring telephoto view of the twilight scene is a composite of images taken roughly every two minutes beginning shortly after Sunset, following the rising Moon as it moves up and to the right. Of course, as the Moon rises it gets brighter and changes color, becoming less reddened as the sight-line through the dense atmosphere is steadily reduced.
In the heart of the Rosette Nebula lies a bright open cluster of stars that lights up the nebula. The stars of NGC 2244 formed from the surrounding gas only a few million years ago. This image taken by the CFHT's new MegaPrime camera shows the region in unprecedented detail. Although the emission nebula is dominated by red hydrogen light, the above image has exaggerated the effect of green light emitted primarily by small amounts of oxygen .