Universe
Outer Planets
1,202 articles in this category.
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New Horizons Continuing On To Pluto, Planet Or Not
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Planetary Blues For Pluto As Solar System's A-List Is Overhauled
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Johns Hopkins Astronomers React To Pluto's Planetary Demotion
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Planetary Line Up Reduced To Four Rocky Worlds And Four Gas Giants
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Xena Awarded "Dwarf Planet" Status
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Planetary Line Up Reduced To Four Rocky Worlds And Four Gas Giants
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Is Pluto a Planet? Astronomers Vote, JHU Takes Straw Poll
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Astrologers Unfazed By New Planet Plans
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Planetary Scientists Support Proposed Redefinition Of A Planet
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NASA's Spitzer Digs Up Troves of Possible Solar Systems in Orion
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The IAU Draft Definition Of Planets And Plutons
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Solar System May Soon Have 12 Planets, And Still Counting
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Astronomers Take Up Planet Debate At International Congress
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Nine Years To The Ninth Planet And Counting
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