The Asterisk Café: Discuss Anything Astronomy Related • Why do we assume that...
One argument against the presence of other technological civilizations in the Milky Way is that if they were here, they would already have colonized the galaxy. I don't find that argument...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Messier 24:...
Messier 24: Sagittarius Star Cloud Explanation: Unlike most entries in Charles Messier's famous catalog of deep sky objects, M24 is not a bright galaxy, star cluster, or nebula. It's a gap in nearby,...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Anticrepuscular...
Anticrepuscular Rays at the Planet Festival Explanation: For some, these subtle bands of light and shadow stretched across the sky as the Sun set on July 11. Known as anticrepuscular rays, the bands...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Apollo 11 Landing...
Apollo 11 Landing Panorama Explanation: Have you seen a panorama from another world lately? Assembled from high-resolution scans of the original film frames, this one sweeps across the magnificent...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: King of Wings...
King of Wings Hoodoo under the Milky Way Explanation: This rock structure is not only surreal -- it's real. Perhaps the reason it's not more famous is that it is smaller than one might guess: the...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Chamaeleon Dark...
Chamaeleon Dark Nebulas Explanation: Sometimes the dark dust of interstellar space has an angular elegance. Such is the case toward the far-south constellation of Chamaeleon. Normally too faint to...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: The Crab Nebula...
The Crab Nebula from Visible to X-Ray Explanation: What powers the Crab Nebula? A city-sized magnetized neutron star spinning around 30 times a second. Known as the Crab Pulsar, it is the bright spot...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Exaggerated Moon...
Exaggerated Moon Explanation: Our Moon doesn't really have craters this big. Earth's Moon, Luna, also doesn't naturally show this spikey texture, and its colors are more subtle. But this digital...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: NGC 7023: The...
NGC 7023: The Iris Nebula Explanation: These cosmic clouds have blossomed 1,300 light-years away in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the...
View ArticleThe Library: Information Desk and Educational Resources • How to make sense...
Here's a video of a rocket launch. I've timed it to 2:10, where we can see a magnificent view of some material apparently moving up around the rocket. Assuming that the POV is down on the ground...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Facing NGC 6946...
Facing NGC 6946 Explanation: From our vantage point in the Milky Way Galaxy, we see NGC 6946 face-on. The big, beautiful spiral galaxy is located just 20 million light-years away, behind a veil of...
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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Saturn at the...
Saturn at the Moon's Edge Explanation: Saturn now rises before midnight in planet Earth's sky. On July 24, the naked-eye planet was in close conjunction, close on the sky, to a waning gibbous Moon....
View ArticleThe Bridge: Discuss an Astronomy Picture of the Day • loli
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View ArticleShip's Log: APOD Retrospectives and Collections • loli
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View ArticleThe Library: Information Desk and Educational Resources • loli
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View ArticleThe Communications Center: Breaking Science News • loli
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View ArticleThe Observation Deck: Latest Sky Photography • loli
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View ArticleThe Asterisk Café: Discuss Anything Astronomy Related • loli
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View ArticleClassroom: Extraordinary Concepts in Physics • loli
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View ArticleThe Science Labs: Participate in Citizen Science or Smartphone Science • loli
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