<p>Big sunspot AR1429, which emerged over the weekend, is crackling with strong flares.</p> <p>This morning the active region produced an <a href="http://spaceweather.com/glossary/flareclasses.html?PHPSESSID=0798dfrgeu8aljdqfmr1e34fh0" target="_blank">X1-class</a> eruption and a bright coronal mass ejection (CME).
AAVSO Alert Notice 452<br /> Simultaneous observations of SU Aur and AB Aur requested for XMM-Newton<br /> February 8, 2012 <p>Dr. Hans Moritz Guenther, Harvard-Smithsonian Center for Astrophysics, has requested bracketing and simultaneous
<p></p> <p>NASA’s Kepler Mission has released 43 days of science data on more than 156,000 stars. These stars are being monitored for subtle brightness changes as part of an ongoing search
<p>Astronomers using NASA’s Swift satellite and Fermi Gamma-ray Space Telescope are seeing frequent blasts from a stellar remnant 30,000 light-years away. The high-energy fireworks arise from a rare type of