January 06, 2009 Cassiopeia A Comes Alive Across Time and Space Two new efforts have taken a famous supernova remnant from the static to the dynamic. A new movie of data from NASA's Chandra X-ray Observatory shows changes in time never seen before in this type of object.  Read More...

January 05, 2009 Milky Way a Swifter Spinner, More Massive, New Measurements Show Fasten your seat belts -- we're faster, heavier, and more likely to collide than we thought. Astronomers making high-precision measurements of the Milky Way say our Galaxy is rotating about 100,000 miles per hour faster than previously understood.  Read More...

January 05, 2009 Baby Jupiters Must Gain Weight Fast The planet Jupiter gained weight in a hurry during its infancy. It had to, since the material from which it formed probably disappeared in just a few million years, according to a new study of planet formation around young stars.  Read More...