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Fraser
2006-Oct-13, 06:49 PM
NASA's Spitzer Space Telescope has measured the day and night time temperatures of an extrasolar planet. This planet is located 40 light-years away, circling the star Upsilon Andromedae. It's classified as a "hot Jupiter", and orbits its parent star once every 4.6 days. The temperature difference between the day and night sides is enormous - differing about about 1,400 degrees Celsius (2,550 degrees Fahrenheit). Although the planet itself is tidally locked to the star, and always presents one face, its atmosphere probably does swirl around, and distributes the heat somewhat.

Read the full blog entry (http://www.universetoday.com/2006/10/13/day-and-night-on-an-extrasolar-planet/)

GOURDHEAD
2006-Oct-14, 02:59 PM
I wonder whether some of the coolness of the dark side of the planet is due to observing higher altitudes of its atmosphere being pushed up by the stellar wind.

greenfeather
2006-Oct-15, 11:38 AM
NASA's Spitzer Space Telescope has measured the day and night time temperatures of an extrasolar planet. This planet is located 40 light-years away, circling the star Upsilon Andromedae. It's classified as a "hot Jupiter", and orbits its parent star once every 4.6 days. The temperature difference between the day and night sides is enormous - differing about about 1,400 degrees Celsius (2,550 degrees Fahrenheit).

From a non scientist, just curious whether gas heats up more quickly and holds higher temperatures than rock. When the gas is extremely cold on the nightside, does it freeze to a liquid or solid?