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Source page: |
http://commons.wikimedia.org/wiki/File:Necklace_Nebula.jpg |
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Summaryedit
Description |
English: A giant cosmic necklace glows brightly in this NASA/ESA Hubble Space Telescope image.
The object, aptly named the Necklace Nebula, is a recently discovered planetary nebula, the glowing remains of an ordinary, Sun-like star. The nebula consists of a bright ring, measuring about two light-years across, dotted with dense, bright knots of gas that resemble diamonds in a necklace. The knots glow brightly due to absorption of ultraviolet light from the central stars. A pair of tightly orbiting stars produced the nebula, also called PN G054.2-03.4. About 10 000 years ago one of the aging stars ballooned to the point where it engulfed its companion star. The smaller star continued orbiting inside its larger companion, increasing the giant’s rotation rate, so that the bloated star span so fast that a large part of its gaseous envelope expanded into space. Most of the gas escaped along the star’s equator, producing a ring. The bright knots are dense gas clumps in the ring. The pair is so close, only a few million kilometres apart, that they appear as one bright dot in the centre of this image. The stars are furiously whirling around each other, completing an orbit in a little more than a day. For comparison, Mercury, the innermost planet of our Solar System, orbits the Sun in 88 days. The Necklace Nebula is located 15 000 light-years away in the constellation of Sagitta (The Arrow). In this composite image, taken on 2 July, Hubble’s Wide Field Camera 3 captured the glow of hydrogen (blue), oxygen (green), and nitrogen (red). |
Date | |
Source | https://www.spacetelescope.org/images/potw1133a/ |
Author | NASA, ESA and the Hubble Heritage Team (STScI/AURA) |
Licensingedit
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 3.0 Unported license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the spacetelescope.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
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This file is licensed under the Creative Commons Attribution 3.0 Unported license. | ||
Attribution: ESA/Hubble | ||
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EXIF data: | |
File name | necklace_nebula.jpg |
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Size, Mbytes | 4.4122236328125 |
Mime type | image/jpeg |
Orientation of image | 1 |
Image resolution in width direction | 300 |
Image resolution in height direction | 300 |
Unit of X and Y resolution | 2 |
Exif version | 0220 |
Color space information | 1 |
Exif image width | 4000 |
Exif image length | 2871 |
Software used | Adobe Photoshop CS5 Macintosh |
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