Image of the Day

1 of 21

Tightly Packed

Credit: NASA & ESA
Thursday, May 28, 2015: The Arches Cluster, the densest known star cluster in the Milky Way, lies about 25,000 light-years from Earth in the constellation…Read More »

of Sagittarius (The Archer), near the heart of the galaxy. Stars pack into the Arches cluster so densely that over 100,000 stars fit into a region with a radius equal to the distance between the sun and its nearest star. At least 150 stars within the cluster represent the brightest discovered in the the Milky Way. This observation depicts the Arches Cluster in infrared light. Image released May 25, 2015.

— Tom Chao    Less «
More from