File:Ant Nebula.jpg
原始檔案 (1,072 × 708 像素,檔案大小:1.14 MB,MIME 類型:image/jpeg)
說明
描述Ant Nebula.jpg |
The Ant planetary nebula (Menzel 3 or Mz 3). STScI-PRC2001-05 This NASA/ESA Hubble Space Telescope image reveals the ant's body as a pair of fiery lobes protruding from a dying, Sun-like star. Though approaching the violence of an explosion, the ejection of gas from the dying star at the center of Mz3 has intriguing symmetrical patterns unlike the chaotic patterns expected from an ordinary explosion. Scientists using the Hubble space telescope would like to understand how a spherical star can produce such prominent, non-spherical symmetries in the gas that it ejects. One possibility is that the central star of Mz3 has a closely orbiting companion that exerts strong gravitational tidal forces, which shape the outflowing gas. For this to work, the orbiting companion star would have to be close to the dying star, about the distance of the Earth from the Sun. At that distance the orbiting companion star wouldn't be far outside the hugely bloated hulk of the dying star. It's even possible that the dying star has consumed its companion, which now orbits inside of it, much like the duck in the wolf's belly in the story "Peter and the Wolf." A second possibility is that, as the dying star spins, its strong magnetic fields are wound up into complex shapes. Charged winds moving at speeds up to 1000 kilometers per second from the star, are able to follow the twisted field lines on their way out into space. These dense winds can be rendered visible by ultraviolet light from the hot central star or from highly supersonic collisions with the ambient gas that excites the material into florescence. Astronomers Bruce Balick (University of Washington) and Vincent Icke (Leiden University) used Hubble to observe this planetary nebula, Mz3, in July 1997 with the Wide Field Planetary 2 camera. One year later, astronomers Raghvendra Sahai and John Trauger of the Jet Propulsion Lab in California snapped pictures of Mz3 using slightly different filters. This intriguing image, which is a composite of several filters from each of the two datasets, was created by the Hubble Heritage Team. |
來源 |
http://hubblesite.org/newscenter/newsdesk/archive/releases/2001/05/image/a (http://en.wikipedia.org/wiki/Image:Ant.nebula.arp.600pix.jpg) |
作者 |
NASA, ESA & the Hubble Heritage Team (STScI/AURA).
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Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
警告:
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- COPYRIGHT: “Unless otherwise specifically stated, no claim to copyright is being asserted by STScI and it may be freely used as in the public domain in accordance with NASA's contract. However, it is requested that in any subsequent use of this work NASA and STScI be given appropriate acknowledgement.”
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目前 | 2008年2月1日 (五) 01:04 | 1,072 × 708(1.14 MB) | Papa November(留言 | 貢獻) | Full res version from source | |
2008年2月1日 (五) 01:01 | 1,072 × 708(148 KB) | Papa November(留言 | 貢獻) | Uploaded full resolution image from source | ||
2008年1月29日 (二) 14:30 | 600 × 362(69 KB) | Nk(留言 | 貢獻) | {{Information |Description=The Ant planetary nebula (Menzel 3 or Mz 3). STScI-PRC2001-05 This NASA/ESA Hubble Space Telescope image reveals the ant's body as a pair of fiery lobes protruding from a dying, Sun-like star. Though approaching the violence o |
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