NGC 1156 is a dwarf irregular galaxy in the Aries constellation of the type ibm. It is considered a Magellanic-type irregular. The galaxy has a larger than average core, and contains zones of contra-rotating gas. The counter-rotation is thought to be the result of tidal interactions with another gas rich galaxy some time in the past. It has a H II nucleus. The AGES survey has discovered a candidate dark galaxy close to NGC 1156, one of only a few so far found.
References
External links Media related to NGC 1156 at Wikimedia Commons Arecibo Survey Produces Dark Galaxy Candidate (SpaceDaily) http://www.astrophotos.net/pages/GALAXIES/NGC%201156.htm http://www.jupiter-jp.net/~ike/English/description/N1156.htm http://www.ursa.fi/~sirius/cgi-bin/rade.cgi?NGC1156