Monday, March 15, 2004
Sedna: The Tenth Planet? 
by Lenka Reznicek [permalink] 
Newsflash from the far edges of our solar system: NASA is reportedly set to announce today the recent discovery of a 1,700 kilometer diameter object beyond the orbit of Pluto, provisionally named "Sedna" after the goddess of Inuit legend who created the creatures of the sea. Sedna could eventually become the tenth official planet. It's been a long time since we've welcomed a new member to our planetary family, 1930 to be exact.

However, don't expect a manned spaceflight to Sedna any time soon: its temperature never rises above -400°F, making it the coldest known body in the solar system.