... NGC 3603: An Active Star Cluster . ... NGC 3603 is home to a massive star cluster, thick dust pillars, and a star about to explode. ... Do all galaxies have black holes at their centers? ... On October 1, 1847 Maria Mitchell swept the sky with her telescope and discovered a comet (comet Mitchell 1847VI). ... Astronomers have discovered that looking at dust along the plane of our Milky Way Galaxy is a bit like looking into a frothy glass of beer. The dust between stars in our galaxy appears.. ...