File:NGC 4639.jpg
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DescriptionNGC 4639.jpg |
This Hubble Space Telescope image shows NGC 4639, a spiral galaxy located 78 million light-years away in the Virgo cluster of galaxies. The blue dots in the galaxy's outlying regions indicate the presence of young stars. Among them are young, bright stars called Cepheids, which are used as reliable milepost markers to obtain accurate distances to nearby galaxies. |
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Source | http://www.spacetelescope.org/images/opo9621b/ (cropped using jpegtran) | ||||
Author | A. Sandage (Carnegie Observatories), A. Saha (Space Telescope Science Institute), G.A. Tammann, and L. Labhardt (Astronomical Institute, University of Basel), F.D. Macchetto and N. Panagia (Space Telescope Science Institute and European Space Agency) and NASA | ||||
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:40, 9 July 2009 | 1,483 × 960 (353 KB) | Tryphon (talk | contribs) | Losslessly cropped from File:NGC 4639 (captured by the Hubble Space Telescope).jpg using jpegtran. | |
18:55, 3 August 2007 | 450 × 288 (12 KB) | Angusmclellan (talk | contribs) | {{Information |Description=A en:Hubble Space Telescope (HST) image of en:NGC 4639. Credit: HST/en:NASA/en:ESA. |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.org/w/index.ph |
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