Saturn
Solar Prominence

Whirlpool Galaxy
Pillars of Creation
Ptolemy (ca. 100-ca. 170)
Nicholaus Copernicus (1473-1543)
Tycho Brahe (1546-1601)
Johannes Kepler (1571-1630)
Galileo Galilei (1564-1642)
 Isaac Newton (1642-1727)
 Albert Einstein (1879-1955)
 Edwin Hubble (1889-1953)
Steven W. Hawking (1942-)
Last Updated 02/01/2012

Surface of Mars from Pathfinder Download Adobe Acrobat Reader

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