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Why Does Earth Spin?
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Every 24 hours, Earth makes a full rotation on its axis. But why does Earth spin in the first place?
How many solar cells would I need in order to provide all of the electricity that my house needs?
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How many solar cells would I need in order to provide all of the electricity that my house needs? Learn more about solar cells and how they work.
How Many Moons Does Jupiter Have? We're Losing Count
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Scientists are continually discovering more moons orbiting the outer planets, particularly Saturn and Jupiter. Just how many moons does Jupiter have?
Why Is Pluto No Longer Considered a Planet?
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On Aug. 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status.
Uranus: The Ice Giant on a Tilted Axis
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Uranus is the seventh planet from the sun and sits on an axial plane tilted at a jaw-dropping 97.7-degree angle. And yes, Uranus does actually stink.
Gliese 581c: The First 'Earth-like' Planet Found
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Gliese 581c was one of the first "Earth-like" planets found, back in 2007. It generated a lot of excitement then but what about now?
How Asteroids Work
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What exactly are asteroids? And what was the NEAR Shoemaker mission about?
The Truth Behind the Rogue Planet Nibiru
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The idea of planet Nibiru, sometimes dubbed Planet X, has captivated doomsday prophets and conspiracy theorists for decades.
Pluto: Is It a Planet After All?
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Back in 2006, the International Astronomical Union decided to demote Pluto to the status of a dwarf planet. A historical study challenges that designation.
Scientists Confirm Uranus Stinks
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Astronomers have discovered the chemical signature of hydrogen sulfide, a foul-smelling compound, in Uranus' clouds. Learn more at HowStuffWorks.