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moon and mars
Comparison between the Earth's moon and the beautiful planet Mars
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Clouds of the Carina Nebula
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The North America Nebula in Infrared
The North America Nebula can do what most North Americans cannot -- form stars.
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Astronomy Picture of the Day: Seeing Titan
Shrouded in a thick atmosphere, Saturn's largest moon Titan really is hard to see.
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Astronomy Picture of the Day: Star Size Comparison 2
How big is our Sun compared to other stars? In dramatic and popular videos featured on YouTube, the relative sizes of planets, stars, and even the universe are shown from smallest to largest.
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Astronomy Picture of the Day: Hubble's Jupiter and the Shrinking Great Red Spot
What will become of Jupiter's Great Red Spot?
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Astronomy Picture of the Day: Mars Between Nebulas
What's that bright red spot between the Lagoon and Trifid Nebulas?
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