As New Horizons passed Pluto in July 2015, did the dwarf planet alter the probe's trajectory? Douglas KaupaCouncil Bluffs, ...
From the time of its discovery in 1930 until 1992, Pluto was a happy, full-fledged planet. A little odd maybe with its tipped, eccentric orbit and tiny size, but the ninth planet just the same. That ...
On Aug. 24, 2006, the International Astronomical Union voted to strictly define a planet, which ultimately downgraded Pluto from the ninth planet from the sun to a dwarf planet — causing controversy ...
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The definition of a planet has been a hot topic ever since a change kicked Pluto out of our planetary lineup in 2006. Now, a group of researchers is proposing a new definition yet again—one with much ...
Editor’s note: A version of this story originally appeared in Astronomy’s 2007 special issue 50 Greatest Mysteries of the Universe. For a more recent discussion of Pluto’s planethood, see “An ...
Watch a ball throw on each planet in our solar system, plus Pluto and the moon, below. Imagine throwing a baseball. Easy, right? Maybe you've already done it a few times. Now imagine throwing a ...
James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...
When you buy through links on our articles, Future and its syndication partners may earn a commission. A composite of enhanced color images of Pluto and Charon taken by NASA's New Horizons spacecraft ...
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