File:Hubble First Light, First Released Image (STScI-1990-04a).png
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原始檔案 (543 × 817 像素,檔案大小:265 KB,MIME 類型:image/png)
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[編輯]描述Hubble First Light, First Released Image (STScI-1990-04a).png |
English: This image is part of the first image taken with NASA's Hubble Space Telescope's (HST) Wide Field/Planetary Camera. All objects seen are stars within open cluster NGC 3532 in the Milky Way galaxy. Stars pictured in the HST frame are sharper than ground telescope images and well resolved, as shown by the double star at the top of the image. By avoiding the Earth's atmosphere, the HST gives sharper images and better resolution. In this early engineering picture, the HST images are roughly 50 percent sharper than the ground-based images.
Technical Details: The first image taken with the HST is intended to assist in focusing the telescope. The region observed is centered on the 8.2 magnitude star HD96755 in the open cluster NGC 3532, in the southern constellation Carina. Identical small subsections of the HST and ground-based image pictures were chosen to highlight the difference in resolution. The field shown is approximately 11 x 14 arcseconds in size and does not contain HD96755. The HST image is a thirty-second exposure taken by the Wide Field/Planetary Camera. The picture shown was extracted from the area observed by the WF-3 OCD using the F555W broadband filter. The measured width of star profiles (FWFM) gives a good indication of the angular resolution. The FWFM of the stars in the HST picture is about 0.8 arcseconds, compared to 1.1 arcseconds for normal ground telescopes, which points out the remarkable increase in resolution of the HST even at this early stage of the focusing task. |
日期 | |
來源 | http://hubblesite.org/newscenter/archive/releases/1990/04/image/a/ |
作者 | NASA, ESA, and STScI |
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[編輯]Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
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目前 | 2012年7月10日 (二) 06:24 | 543 × 817(265 KB) | Huntster(對話 | 貢獻) | == {{int:license}} == {{Information |Description={{en|1=This image is part of the first image taken with NASA's Hubble Space Telescope's (HST) Wide Field/Planetary Camera. All objects seen are stars within open cluster NGC 3532 in the Milky Way galaxy.... |
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