ScienceDaily: Cosmic Rays News |
- NASA's Wind mission encounters 'SLAMS' waves
- Dying supergiant stars implicated in hours-long gamma-ray bursts
- Strange new bursts of gamma rays point to a new way to destroy a star
| NASA's Wind mission encounters 'SLAMS' waves Posted: 16 Apr 2013 03:00 PM PDT To tease out what happens at that boundary of the magnetosphere and to better understand how radiation and energy from the sun can cross it and move closer to Earth, NASA launches spacecraft into this region to observe the changing conditions. From 1998 to 2002, NASA's Wind spacecraft traveled through this foreshock region in front of Earth 17 times, providing new information about the physics there. |
| Dying supergiant stars implicated in hours-long gamma-ray bursts Posted: 16 Apr 2013 03:00 PM PDT Three unusually long-lasting stellar explosions discovered by NASA's Swift satellite represent a previously unrecognized class of gamma-ray bursts. Two international teams of astronomers studying these events conclude that they likely arose from the catastrophic death of supergiant stars hundreds of times larger than the sun. |
| Strange new bursts of gamma rays point to a new way to destroy a star Posted: 16 Apr 2013 11:47 AM PDT Scientists have pinpointed a new type of exceptionally powerful and long-lived cosmic explosion, prompting a theory that they arise in the violent death throes of a supergiant star. |
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