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2007-05-13

First Map of Alien World

This is the first-ever map of the surface of an exoplanet, or a planet beyond our solar system. The map, which shows temperature variations across the cloudy tops of a gas giant called HD 189733b, is made up of infrared data taken by NASA's Spitzer Space Telescope. Hotter temperatures are represented in brighter colors.

http://www.spitzer.caltech.edu/Media/releases/ssc2007-09/ssc2007-09a.shtml

A galactic fossil: Star is found to be 13.2 billion years old

Recent cosmological studies show that the Big Bang occurred 13.7 billion years ago. The metal-poor star HE 1523 formed in our Milky Way galaxy soon afterward, cosmologically speaking: 13.2 billion years ago. The primitive star contained the radioactive heavy elements uranium and thorium, and the amounts of those elements decay over time, each according to its own half-life.

http://physorg.com/news98033554.html