Virgo Cluster Galaxy NGC 4731
http://apod.nasa.gov/apod/ap100429.html
This is a picture of NGC 4731 in the constellation Virgo. It is a barred spiral galaxy in the Virgo cluster of galaxies and is about 65 million light-years away. The Virgo cluster contains around 1300 but possibly up to 2000 galaxies. This cluster is the center of the Virgo Supercluster, which contains the Local Group. The newly-formed blue stars are visible in the spiral arms. The galaxy's arms are affected by the gravity of the elliptical galaxy NGC 4697. NGC 4731A is an irregular galaxy and is also in this picture. Young blue stars are also evident in this galaxy.
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