The ET Cluster (NGC457) is an open star cluster in the constellation Cassiopeia and lies over 7,900 light years away from the Sun. It has an estimated age of 21 million years. The cluster is often referred to as The ET Cluster (due to its resemblance to the movie character), or The Owl Cluster. The two bright stars, magnitude 5 Phi-1 Cassiopeiae and magnitude 7 Phi-2 Cassiopeiae can be imagined as the eyes.
30/10/2013
9x300sec Subs, Darks, Flats and Bias
No comments:
Post a Comment