File:The Crab Nebula - A Flickering X-ray Candle.ogv
Summary
The Crab Nebula, created by a supernova seen nearly a thousand years ago, is one of the sky's most famous "star wrecks." For decades, most <a href="//commons.wikimedia.org/wiki/Category:Astronomers" title="Category:Astronomers">astronomers</a> have regarded it as the steadiest beacon at <a href="//commons.wikimedia.org/wiki/X-ray" title="X-ray">X-ray</a> energies, but data from orbiting observatories show unexpected variations. Since 2008, it has faded by 7 percent, activity likely tied to the environment around its central <a href="//commons.wikimedia.org/w/index.php?title=Neutron_star&action=edit&redlink=1" class="new" title="Neutron star (page does not exist)">neutron star</a>.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:50, 17 January 2017 | 1 min 49 s, 512 × 288 (7.62 MB) | 127.0.0.1 (talk) | The Crab Nebula, created by a supernova seen nearly a thousand years ago, is one of the sky's most famous "star wrecks." For decades, most <a href="//commons.wikimedia.org/wiki/Category:Astronomers" title="Category:Astronomers">astronomers</a> have regarded it as the steadiest beacon at <a href="//commons.wikimedia.org/wiki/X-ray" title="X-ray">X-ray</a> energies, but data from orbiting observatories show unexpected variations. Since 2008, it has faded by 7 percent, activity likely tied to the environment around its central <a href="//commons.wikimedia.org/w/index.php?title=Neutron_star&action=edit&redlink=1" class="new" title="Neutron star (page does not exist)">neutron star</a>. |
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