Star Viewer Update

I've added two more of the wonderful Hubblecast videos from the European Space Agency to the Star Viewer map.

One of the videos is about Abel 2667. Abell 2667 is a cluster of galaxies, located about 2.7 billion light years from the Earth. The cluster is at least 350 times our Galaxy's mass. That much mass creates a lot of gravity, and that gravity is tearing the galaxy apart.

The other video looks at a ghostly ring of dark matter formed long ago during a colossal collision between two galaxy clusters.