Think of an object made of iron: An I-beam, a car frame, a nail. Now imagine that half of the iron in that object owes its existence to bacteria living two and a half billion years ago.
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Astrogeology: July 2015
Planet Earth is situated in what astronomers call the Goldilocks Zone -- a sweet spot in a solar system where a planet's surface temperature is neither too hot nor too cold.
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- 25 Apr: NASA Aerospace Safety Advisory Panel Meeting
- 26 Apr: Space Transportation Association Briefing With NASA Chief Scientist Jim Green
- 29 Apr: 6th IAA Planetary Defense Conference
- 29 Apr: International Planetary Defense Conference
- 30 Apr: NASA Advisory Council Technology, Innovation and Engineering Committee Meeting
- 30 Apr: NASA Advisory Council Human Exploration and Operations Committee Meeting
- 1 May: NASA Advisory Council; Regulatory and Policy Committee Meeting
- 1 May: NASA FY 2020 Budget Hearing
- 2 May: NASA Advisory Council STEM Engagement Committee Meeting
- 7 May: NASA Applied Sciences Advisory Committee Meeting
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