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Carl Sagan with a model of the Viking Lander in Death Valley California. Viking 1 and II were the first spacecraft to search for present day life on Mars. Indeed, so far they are the only ones to search directly for life anywhere ouside of Earth, though that may be about to change in the near future.

Featured articles

Astrobiology:

• Astrobiology
• Abiogenesis - about natural process of how life arises from non living matter
• Panspermia - transfer of life between planets on meteorites.
• Terrestrial analogue sites
• Murchison meteorite

Life on Mars:

• Possible present day habitats for life on Mars
• Life on Mars
• Present day Mars habitability analogue environments on Earth
• Viking program
• Allan Hills 84001 - the meteorite with tiny structures resembling cells

Life elsewhere

• Hypothetical types of biochemistry
• Life on Titan
• Life on Venus

Planetary protection:

• Planetary protection
• Interplanetary contamination
• Planetary protection for a Mars sample return

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Astrobiology

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About this site

This encyclopedia is based on astrobiology articles imported from Wikipedia. You are welcome to join in and help edit it. We welcome those knowledgeable in astrobiology especially, and your expertise and knowledge will be respected here. The aim here is to have a small friendly wiki, where we work together, and know each other. Do introduce yourself, here New editors

For the reason for setting up a new encyclopedia for this content, instead of fixing it in Wikipedia itself, see background to this encyclopedia.