Astronomers have used data from HST and Spitzer to construct the 3-D evolution of the supernova remnant Cassiopeia A.
NASA scientists have announced that they’ve detected carbon dioxide on a planet 63 light-years from Earth. The new find is another technical triumph, part of a growing effort to measure the chemical makeup of faraway worlds.
Wait a second. The start of next year will be delayed by circumstances beyond everyone's control. Time will stand still for one second on New Year's Eve, as we ring in 2009.
The Mars Reconnaissance Orbiter has taken striking images of periodically deposited sedimentary layers, suggesting that random floods or volcanic eruptions did not create them.