FROM STEVE KLEYN Hubble sees Comet ISON 24 April: Later this year, Comet ISON is expected to become a naked-eye object when it skims through the atmosphere of the Sun. The Hubble Space Telescope has just obtained a sneak preview when it photographed ISON on 10 April. At the time, the comet was 386 million …
The blasts emit surges of gamma rays as well as X-rays, and they produce afterglows that are visible at optical and radio energies. By NASA’s Goddard Space Flight Center, Greenbelt, Maryland — Published: April 17, 2013 Three unusually long-lasting stellar explosions discovered by NASA’s Swift satellite represent a previously unrecognized class of gamma-ray bursts (GRBs). …
Dying supergiant stars implicated in hours-long gamma-ray bursts Read More »
Roughly every 11 years, headlines announce the peak of a natural variation known as the solar cycle, pointing to a proliferation of sunspots, potentially dangerous solar flares and beautiful aurora. This period of increased activity is known as solar maximum, the latest of which is predicted to arrive in August. But scientists who study the …
Astronomers are excited about a sungrazing comet discovered late in 2012. For a short time, it might become as bright as a full moon. That’ll be around the time of its perihelion – or closest approach to the sun – on November 28, 2013. This comet is called C/2012 S1 (ISON) by astronomers. All …
Big sun-diving Comet ISON might be spectacular in late 2013 Read More »
New results from NASA’s Hubble Space Telescope confirm that dark matter and galaxies separated in Abell 520 instead of staying anchored together, as predicted.
