Double Cluster (h and Chi Persei; NGC 869 and NGC 884)
Two young open clusters that lie close
together in the sky in Perseus and are visible
to the naked eye on a clear, dark night as a hazy patch of light. Both clusters
lie in the Perseus OB1 Association and contain many B
stars and M supergiants.
| Double Cluster.
Image credit: Michael Fullbright (MSFAstro.net)
||4.3 (h), 4.4 (Chi)
|age (millions of years)
||5.6 (h), 3.2 (Chi)
||7,100 (h), 7,400 (Chi)
AND STAR CLUSTERS