News tagged with gamma rays

A supernova cocoon breakthrough

(Phys.org) -- Observations with NASA's Chandra X-ray Observatory have provided the first X-ray evidence of a supernova shock wave breaking through a cocoon of gas surrounding the star that exploded. This discovery ...

May 15, 2012
4.8 / 5 (6) 0 | with audio podcast

Neutrinos put cosmic ray theory on ice

(Phys.org) -- A telescope buried beneath the South Pole has failed to find any neutrinos accompanying exploding fireballs in space, undermining a leading theory of how cosmic rays are born.

Apr 20, 2012
4.5 / 5 (4) 11 | with audio podcast

Dawn gets extra time to explore Vesta

(Phys.org) -- NASA's Dawn mission has received official confirmation that 40 extra days have been added to its exploration of the giant asteroid Vesta, the second most massive object in the main asteroid belt. ...

Apr 19, 2012
5 / 5 (4) 6 | with audio podcast

Fermi telescope explores new energy extremes

(PhysOrg.com) -- After more than three years in space, NASA's Fermi Gamma-ray Space Telescope is extending its view of the high-energy sky into a largely unexplored electromagnetic range. Today, the Fermi ...

Jan 10, 2012
4.9 / 5 (17) 0 | with audio podcast

Fermi shows that Tycho's star shines in gamma rays

(PhysOrg.com) -- In early November 1572, observers on Earth witnessed the appearance of a "new star" in the constellation Cassiopeia, an event now recognized as the brightest naked-eye supernova in more than ...

Dec 13, 2011
4.9 / 5 (11) 6 | with audio podcast

Dawn spacecraft spirals down to lowest orbit

(PhysOrg.com) -- NASA's Dawn spacecraft successfully maneuvered into its closest orbit around the giant asteroid Vesta today, beginning a new phase of science observations. The spacecraft is now circling Vesta ...

Dec 13, 2011
4.6 / 5 (8) 4 | with audio podcast