| | Distant planet is half fire, half ice - USATODAY.com (Site not responding. Last check: 2007-11-03) |
 | | With one side always hot as lava and the other chilled possibly below freezing, Upsilon Andromeda b is a giant gas planet that orbits extremely close to Upsilon Andromeda, a star 40 light-years from our solar system in the constellation Andromeda. |
 | | Using infrared data collected by NASA's Spitzer Space Telescope, the researchers calculated that temperatures on the sunlit side of the Upsilon Andromeda b were between 2,550 to 3,000 degrees Fahrenheit (1,400 to 1,650 degrees Celsius) but only minus 4 to 450 degrees Fahrenheit (20 to 230 degrees Celsius) on the dark side. |
 | | Spitzer made infrared measurements of the planet at five different points during its orbit and found that its light levels went up and down, depending on whether its sunlit or dark side was facing Earth. |
| www.usatoday.com /tech/science/space/2006-10-16-hot-cold-planet_x.htm (577 words) |