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File:NGC 4414 (NASA-med).jpg

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描述
English: In 1995, the majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 different occasions over the course of two months. Images were obtained with Hubble's Wide Field Planetary Camera 2 (WFPC2) through three different color filters. Based on their discovery and careful brightness measurements of variable stars in NGC 4414, the Key Project astronomers were able to make an accurate determination of the distance to the galaxy. The resulting distance to NGC 4414, 19.1 megaparsecs or about 60 million light-years, along with similarly determined distances to other nearby galaxies, contributes to astronomers' overall knowledge of the rate of expansion of the universe. In 1999, the Hubble Heritage Team revisited NGC 4414 and completed its portrait by observing the other half with the same filters as were used in 1995. The end result is a stunning full-color look at the entire dusty spiral galaxy. The new Hubble picture shows that the central regions of this galaxy, as is typical of most spirals, contain primarily older, yellow and red stars. The outer spiral arms are considerably bluer due to ongoing formation of young, blue stars, the brightest of which can be seen individually at the high resolution provided by the Hubble camera. The arms are also very rich in clouds of interstellar dust, seen as dark patches and streaks silhouetted against the starlight.

ID: GPN-2000-000933

Other ID: PR99-25
日期
来源 http://nix.larc.nasa.gov/info;jsessionid=1sl2so6lc9mab?id=GPN-2000-000933&orgid=12
http://imgsrc.hubblesite.org/hu/db/images/hs-1999-25-a-full_tif.tif
作者 The Hubble Heritage Team (AURA/STScI/NASA)
NASA Headquarters - Greatest Images of NASA (NASA-HQ-GRIN)
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(二次使用本文件)
Public domain
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.
English: This category is part of the category scheme space exploration.
Français : Cette catégorie fait partie du schéma des catégories concernant l'exploration de l'espace.
日本語 このカテゴリーはcategory scheme space explorationの一部です。

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NGC 4414 spiral galaxy, photo taken in 1995 by Hubble Space Telescope

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当前2016年12月10日 (六) 10:362016年12月10日 (六) 10:36版本的缩略图1,730 × 1,428(1.71 MB)PlanetUserbetter quality from TIFF
2015年5月2日 (六) 09:382015年5月2日 (六) 09:38版本的缩略图1,730 × 1,428(2.42 MB)Jcpag2012Reverted to version as of 00:15, 23 September 2006
2014年3月23日 (日) 03:512014年3月23日 (日) 03:51版本的缩略图1,730 × 1,428(2.42 MB)1992 FARHAADReverted to version as of 00:15, 23 September 2006
2014年3月15日 (六) 12:012014年3月15日 (六) 12:01版本的缩略图2,908 × 2,400(388 KB)BenisonHigher resolution
2006年9月23日 (六) 00:152006年9月23日 (六) 00:15版本的缩略图1,730 × 1,428(2.42 MB)Tomhigher res
2006年1月21日 (六) 18:312006年1月21日 (六) 18:31版本的缩略图1,024 × 768(60 KB)Red devil 666
2005年5月1日 (日) 21:452005年5月1日 (日) 21:45版本的缩略图727 × 600(393 KB)DannyZ~commonswikin 1995, the majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie I

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