Difference between revisions 391968 and 391969 on testwiki

<div role="note" class="hatnote navigation-not-searchable">This article is about the astronomical object. For other uses, see [[:Planet (disambiguation)]].</div>
[[Category:Wikipedia indefinitely move-protected pages|Planet]]

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Planets are generally divided into two main types: large low-density [[giant planet]]s, and smaller rocky [[terrestrial planet|terrestrials]]. Under IAU definitions, there are eight planets in the Solar System. In order of increasing distance from the [[Sun]], they are the four terrestrials, [[Mercury (planet)|Mercury]], [[Venus]], Earth, and [[Mars]], then the four giant planets, [[Jupiter]], [[Saturn]], [[Uranus]], and [[Neptune]]. Six of the planets are orbited by one or more [[natural satellite]]s.


test Several thousands of planets around other stars ("[[#Exoplanets|extrasolar planet]]s" or "exoplanets") have been discovered in the [[Milky Way]]. As of 1 October 2017, 3,671 known extrasolar planets in 2,751 [[planetary systems]] (including 616 [[List of multiplanetary systems|multiple planetary systems]]), ranging in size from [[Kepler-37b|just above the size of the Moon]] to [[gas giant]]s [[WASP-17b|about twice as large as Jupiter]] have been discovered, out of which more than 100 pla(contracted; show full)
*<span class="nowrap">[[National Diet Library|NDL]]: <span class="uid">[https://id.ndl.go.jp/auth/ndlna/00574136 00574136]</span></span>

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[[Category:Observational astronomy]]
[[Category:Planetary science]]
[[Category:Planets| ]]