Messier 73
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Messier 73 is an asterism of four stars in the constellation Aquarius which was long thought to be a small open cluster. It lies several arcminutes east of globular cluster M72. According to Gaia EDR3
Asterism Messier 73 in Aquarius
Messier object
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The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his Catalogue des Nébuleuses et des Amas d'Étoiles. Because Messier was interested only
Messier 73
…often, and to what degree open clusters are ripped apart by the gravitational forces in the Milky Way and reveal more of the sources of these forces. List of Messier objects Messier 40 - a double star included in the Messier catalogue that was also mistakenly identified as having nebulosity…
All Messier objects
Charles Messier
Crab Nebula
Messier 2 HST Potw 1913a