File:Example of a bipolar nebula.jpg
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DescriptionExample of a bipolar nebula.jpg |
English: Example of a Bipolar nebula Original caption: " A recent image of a dying star containing strange, complex structures may help explain the death throes of stars and defy our current understanding of physics. The image of protoplanetary nebula IRAS22036+5306 (in the Infrared Astronomical Satellite Point Source Catalog) was taken on Dec. 15, 2001, by the Wide Field and Planetary Camera 2, designed and built by NASA's Jet Propulsion Laboratory, onboard NASA's Hubble Space Telescope. It is one of the best images yet to capture a fleeting period at the end of a Sun-like star's life, called the protoplanetary nebula phase.
This phase, which looks like a beautiful cloud of glowing gas lit up by ultraviolet light from the star's core, results when a star evolves into a bloated red giant and sheds its outer layers. "Protoplanetary nebulas are rare objects with short lifetimes," said JPL astrophysicist Dr. Raghvendra Sahai. "It has generally been very difficult to obtain images of such objects in which their structure can be resolved in detail." This image is particularly important because it contains a series of what Sahai and his colleagues call "knotty jets," blob-like objects emerging along roughly straight lines from the center of the cigar-shaped, bipolar nebula (See insets). There are various theories about what may produce such jets, though it is hard to prove their existence due to their short-lived, episodic nature. Detailed multi-wavelength studies of these nebulas with NASA's Great Observatories are being carried out to understand the nature and origin of these enigmatic jets, and how they may be sculpting shrouds of dying stars into exotic shapes. The Hubble Space Telescope is one of NASA's Great Observatories." |
Date | original upload date: 18:55, 18 October 2006 |
Source | This image was sourced under free license from NASA's planetary photojournal: http://photojournal.jpl.nasa.gov/catalog/PIA04277 and http://photojournal.jpl.nasa.gov/jpeg/PIA04277.jpg |
Author | NASA/JPL |
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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[edit]Transferred from en.wikipedia to Commons using FtCG.
The original description page was here. All following user names refer to en.wikipedia.
Date/Time | Dimensions | User | Comment |
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18:55, 18 October 2006 | 869 × 444 (42,813 bytes) | w:en:Mgmirkin (talk | contribs) | (This image was sourced under free license from Nasa's planetary photojournal: http://photojournal.jpl.nasa.gov/catalog/PIA04277 and http://photojournal.jpl.nasa.gov/jpeg/PIA04277.jpg ---------- JPL Image Use Policy Unless otherwise noted, images and ) |
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current | 12:59, 1 January 2012 | 869 × 444 (42 KB) | Bulwersator (talk | contribs) | Transferred from en.wikipedia: see original upload log above |
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