Astronomy Picture of the Day

The Holographic Principle

2017-04-23

Is this picture worth a thousand words? According to the Holographic Principle, the most information you can get from this image is about 3 x ...

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Between the Rings

2017-04-22

On April 12, as the Sun was blocked by the disk of Saturn the Cassini spacecraft camera looked toward the inner Solar System and the gas giant's ...

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NGC 4302 and NGC 4298

2017-04-21

Seen edge-on, spiral galaxy NGC 4302 (left) lies about 55 million light-years away in the well-groomed constellation Coma Berenices. A member of ...

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Asteroid 2014 JO25

2017-04-20

A day before its closest approach, asteroid 2014 JO25 was imaged by radar with the 70-meter antenna of NASA's Goldstone Deep Space Communications ...

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The Red Spider Planetary Nebula

2017-04-19

Oh what a tangled web a planetary nebula can weave. The Red Spider Planetary Nebula shows the complex structure that can result when a normal ...

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Night Glows

2017-04-18

What glows in the night? This night, several unusual glows were evident -- some near, but some far. The foreground surf glimmers blue with the ...

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Two Million Stars on the Move

2017-04-17

If you could watch the night sky for one million years -- how would it change? Besides local effects caused by the Earth's spin and the ...

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Life-Enabling Plumes above Enceladus

2017-04-16

Does Enceladus have underground oceans that could support life? The discovery of jets spewing water vapor and ice was detected by the ...

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Luminous Salar de Uyuni

2017-04-15

A scene in high contrast this thoughtful night skyscape is a modern composition inspired by M. C. Escher's lithograph Phosphorescent Sea. In it, ...

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Earth Shadow over Damavand

2017-04-14

Through crystal clear skies this beautiful panorama follows the curve of planet Earth's shadow rising across the top of the world. The tantalizing ...

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