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Astrobiology Glossary

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Term Definition
Zenith The point on the celestial sphere that is directly above the observer. Holding a balloon overhead places the balloon at your zenith. Although celestial objects appear to rise and set as they move across the sky, they rarely reach the zenith point.

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Quote of the Day

The historic ascent of humanity, taken as a whole, may be summarized as a succession of victories of consciousness over blind forces in nature, in society, in man himself.
- Leon Trotsky (1879 - 1940), Russian revolutionary.

Quiz Me

How fast do the Leonid meteorites travel when entering the atmosphere?
54,000 mph
87,000 mph
121,000 mph
156,000 mph
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Fact of the Day

In England, a stone is equal to 14 pounds, a kilogram to 2.2 pounds.

Word of the Day