Media Information
 
 
 
Collection:
NASA Astronomy Picture of the Day Collection
Title:
Kepler Discovers How Planets Move
Explanation:
Johannes Kepler used simple mathematics to describe how planets move. Kepler [ http://es.rice.edu/…] was an assistant to the most accurate astronomical observer of the time, Tycho Brahe [ http://es.rice.edu/…]. Kepler [ http://www.phys.vir…] was able to use Brahe [ http://antwrp.gsfc.…]'s data to show that planets move in ellipses around the Sun (Kepler's First Law [ http://zebu.uoregon…]), that planets move proportionally faster in their orbits when they are nearer the Sun (Kepler's Second Law [ http://zebu.uoregon…]), and that more distant planets take proportionally longer to orbit the Sun (Kepler's Third Law [ http://scruffy.phas…]). Kepler [ http://www.kepler.a…] lived from 1571 to 1630, during the time of discovery of the telescope. Kepler [ http://www.astro.un…] was one of the few vocal supporters of Galileo [ http://antwrp.gsfc.…]'s discoveries and the Copernican system [ http://zebu.uoregon…] of planets orbiting the Sun [ http://antwrp.gsfc.…] instead of the Earth [ http://www.seds.org…].
Credit and Copyright:
" Johnnes Kepler Gesammelte Werke ", C. H. Beck, 1937
keyword:
Solar System
keyword:
planets
keyword:
Kepler
facet_where:
Virginia
facet_where:
Goddard Space Flight Center (GSFC)
facet_what:
Earth
facet_what:
Galileo
facet_what:
Sun
original url:
http://antwrp.gsfc.…
UID:
SPD-APOD-ap010114

Kepler Discovers How Planets Move
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