Archives for 9 February 2009
Defining Planets (Part IV)
Published on 9 Feb 2009 at 10:29 pm.
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Filed under planets.
The very first definition for planet was simply to designate a celestial body that appeared to move in the sky as a planet. But, that was ultimately deemed insufficient once telescopes discovered more bodies. The first satellites discovered of Jupiter and Saturn were called planets. But, astronomers eventually decided to restrict the […]
