Arp 104
Arp 104, also known as Keenan's System, consists of the two spiral galaxies NGC 5216 (bottom) and NGC 5218 (top). The two are connected by a thin stream of gas, in which new stars are forming. The stream was created when the two galaxies passed by each other, their mutual gravity pulling the gas out. The newly formed hot, massive stars turn the stream blue. The stream is about 150,000 light years in length.
| Observatory: | Kitt Peak National Observatory Kitt Peak, Arizona |
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| Telescope: | KPNO 4-Meter |
| Instrument: | Mosaic I |
| Astronomer: | T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF) |
| Date of Observation: | 06-05-2013 |
| Filters and Assigned Colors: | B (blue), V (green) and I (red) |
| Exposure Times: | 5x15min in B, 5x12min in V and 4x8min in I |
| Location of Image: | Ursa Major |
| Field of View: | 12.7 x 8.4 arcmin |
| Orientation: | North is up, East is left |
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| Link to Full Resolution Image | |
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