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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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A Solstice Night in Paris
The night of June 21 was the shortest night for planet Earth's northern latitudes, so at latitude 48.9 degrees north, Paris was no exception.
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Astronomy Picture of the Day: Light Pillars over Whitefish Bay
What's happening in the sky? Unusual lights appeared last week to hover above Whitefish Bay on the eastern edge of Lake Superior between the USA and Canada.
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Astronomy Picture of the Day: Aurora around Saturn's North Pole
Are Saturn's auroras like Earth's? To help answer this question, the Hubble Space Telescope and the Cassini spacecraft monitored Saturn's North Pole simultaneously during Cassini's final orbits around the gas giant in September 2017.
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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: Noctilucent Clouds over Paris Fireworks
It's northern noctilucent cloud season -- perhaps a time to celebrate!
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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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