... The fifty-fifth entry in Charles Messier's catalog, M55 is a large and lovely globular cluster of around 100,000 stars. Only 20,000 light-years away in the constellation Sagittarius, M55 appears to earth-bound observers to be nearly 2/3 the size of the full moon. ... Is the distant universe really what it appears to be? ... Spiral Galaxy NGC 2841 . ... Some 50 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. ... Across the Universe . ...