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You are here		scienceblogs.com Ask Ethan: Is It Foolishness To Dream Of Terraforming Mars? (Synopsis) \| ScienceBlogs
\|	\|	science.nasa.gov Facts About Earth - NASA Science	3.8 parsecs away Travel
\|	\|	While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. Earth []	3.8 parsecs away Travel
\|	\|	thesilicongraybeard.blogspot.com The Silicon Graybeard: Another "Super-Earth" found, added to the list to check for life	5.3 parsecs away Travel
\|	\|	A "Super-Earth" calledGJ 251c has recently been identified in the regular searches being carried outfor possible signs of life. Th...	5.3 parsecs away Travel
\|	\|	www.space.com Think you know our solar system's dwarf planets? Test your skills with our new quiz! \| Space	4.2 parsecs away Travel
\|	\|	Pluto isn't the only dwarf planet residing in our solar system. Try your hand at naming the others in our quiz!	4.2 parsecs away Travel
\|	\|	www.livescience.com Space Shuttle Enterprise - Facts and Information \| Space	12.2 parsecs away Travel
\|		The space shuttle Enterprise was originally to be known as Constitution. But a group of Star Trek fans were able to change that.	12.2 parsecs away Travel