04.16.13 - Three unusually long-lasting stellar explosions discovered by NASA's Swift satellite represent a new class of gamma-ray bursts that likely arise from dying stars hundreds of times larger than the sun.
04.12.13 - The soft glow in this image is NGC 2768, an elliptical galaxy located in the northern constellation of Ursa Major (The Great Bear).
04.08.13 - X-ray observations from the Japan-led Suzaku satellite are providing a better understanding of the star that met its demise as Kepler's supernova, an event witnessed in 1604 by the famed German astronomer Johannes Kepler.
04.05.13 - NICER will not only reveal why neutron stars are the densest objects in nature, but also demonstrate navigation technology that could revolutionize travel to the far reaches of the solar system and beyond.
04.05.13 - Visible as a small, sparkling hook in the dark sky, J082354.96 is a starburst galaxy, so named because of the incredibly high rate of star formation occurring within it.
04.04.2013 - The light of a red star is warped and magnified by its dead-star companion, as detected by NASA's Kepler space telescope.
04.04.13 - Hubble found the farthest supernova ever recorded. Supernova SN Wilson, named after American President Woodrow Wilson, exploded more than 10 billion years ago.
03.29.13 - The object in this image is Jonckheere 900 or J 900, a planetary nebula — glowing shells of ionized gas pushed out by a dying star.
03.29.13 - The Swift satellite observed a comet that may become one of the most dazzling seen in decades when it rounds the sun later this year.
04.29.13 - The Herschel observatory, a European space telescope for which NASA helped build instruments and process data, has stopped making observations after running out of liquid coolant as expected.