File:Masquerading as a double star.jpg
Masquerading_as_a_double_star.jpg (568 × 586 像素,檔案大小:101 KB,MIME 類型:image/jpeg)
摘要
描述Masquerading as a double star.jpg |
English: The object in this image is Jonckheere 900 or J 900, a planetary nebula — glowing shells of ionised gas pushed out by a dying star. Discovered in the early 1900s by astronomer Robert Jonckheere, the dusty nebula is small but fairly bright, with a relatively evenly spread central region surrounded by soft wispy edges.
Despite the clarity of this Hubble image, the two objects in the picture above can be confusing for observers. J 900’s nearby companion, a faint star in the constellation of Gemini, often causes problems for observers because it is so close to the nebula — when seeing conditions are bad, this star seems to merge into J 900, giving it an elongated appearance. Hubble’s position above the Earth’s atmosphere means that this is not an issue for the space telescope. Astronomers have also mistakenly reported observations of a double star in place of these two objects, as the planetary nebula is quite small and compact. J 900’s central star is only just visible in this image, and is very faint — fainter than the nebula’s neighbour. The nebula appears to display a bipolar structure, where there are two distinct lobes of material emanating from its centre, enclosed by a bright oval disc. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Josh Barrington. |
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來源 | http://www.spacetelescope.org/images/potw1312a/ |
作者 | ESA/Hubble & NASA |
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25 3 2013
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目前 | 2013年3月25日 (一) 10:29 | 568 × 586(101 KB) | Jmencisom | User created page with UploadWizard |
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來源 | ESA/Hubble |
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製作/提供者 | ESA/Hubble & NASAAcknowledgement: Josh Barrington |
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資料產生的日期時間 | 2013年3月25日 (一) 10:00 |
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聯絡資訊 |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |