File:Potw1550a.tif
原始文件 (846 × 846像素,文件大小:2.06 MB,MIME类型:image/tiff)
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[编辑]描述Potw1550a.tif |
English: A Planetary Nebula Divided
The cloud of gas — named NGC 3699 — is a planetary nebula. It is distinguished by an irregular mottled appearance and a dark rift, which roughly bisects it. These objects, despite the name, have nothing to do with planets and are created in the final stages of the evolution of stars similar in mass to the Sun. The name "planetary nebula" arises from the time of their discovery by William Herschel, when they appeared in the telescopes of the time as rounded objects similar in looks to the planets. Towards the end of their lives, stars like the Sun exhaust the supply of hydrogen in their cores, putting a stop to nuclear reactions. This causes the star's core to contract under the force of gravity and heat up, while the cooler outer layers expand tremendously — the surface of the Sun, for example, will likely engulf the orbit of Earth when it reaches this stage in its evolution. Unusually strong stellar winds push the gaseous outer layers of the star out into space, eventually exposing the core of the star, which begins to emit ultraviolet radiation, ionising the expelled gas, causing the nebula's ethereal glow, and producing beautiful and varied sights, such as the one in this image. Credit: ESO About the Object Name: NGC 3699 Type: • Milky Way : Nebula : Type : Planetary Constellation: Centaurus Coordinates Position (RA): 11 27 58.75 Position (Dec): -59° 57' 11.09" Field of view: 4.45 x 4.45 arcminutes Orientation: North is 1.1° right of vertical Colours & filters Band Wavelength Telescope Optical Ha 656 nm New Technology Telescope EFOSC Optical R 658 nm New Technology TelescopeEFOSC Optical V 551 nm New Technology Telescope EFOSC Optical B 445 nm New Technology Telescope EFOSC Optical OIII 500 nm New Technology Telescope EFOSC Ultraviolet U 365 nm New Technology Telescope EFOSC. |
日期 | Release 14 December 2015, 12:00 |
来源 | http://www.eso.org/public/images/potw1550a/ http://www.eso.org/public/archives/images/original/potw1550a.tif |
作者 | Credit: ESO |
许可协议
[编辑]This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
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当前 | 2015年12月14日 (一) 20:23 | 846 × 846(2.06 MB) | Fabian RRRR(留言 | 贡献) | =={{int:filedesc}}== {{Information |description={{en|1=''A Planetary Nebula Divided This fetching cloud of gas was imaged by the ESO Faint Object Spectrograph and Camera (EFOSC2) at ESO's La Silla Observatory. It can be found nestled in the busy cons... |
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宽度 | 846 px |
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高度 | 846 px |
每色彩组分位数 |
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压缩方案 | LZW |
像素构成 | RGB |
方向 | 正常 |
色彩组分数 | 3 |
每带行数 | 103 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
数据排布 | 大块格式 |
使用软件 | Adobe Photoshop CC (Windows) |
文件修改日期时间 | 2015年4月4日 (六) 03:25 |
色彩空间 | sRGB |