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[2] Messier 75 is part of the Gaia Sausage, the hypothesized remains of a dwarf galaxy that merged with the Milky Way. [10] It is a halo object with an orbital period of 0.4 billion years to travel around the galaxy on a very pronounced ellipse, specifically eccentricity of 0.87. The apocenter (maximal distance from Earth) is about 57,000 ly ...
Charles Messier. The first edition of 1774 covered 45 objects (M1 to M45).The total list published by Messier in 1781 contained 103 objects, but the list was expanded through successive additions by other astronomers, motivated by notes in Messier's and Méchain's texts indicating that at least one of them knew of the additional objects.
Bar — Barkhatova (open star clusters) (for example: Barkhatova 1, NNW of NGC 7000; the North America Nebula in Cygnus) BAR — E.E. Barton (double stars) Bas — Basel (open star clusters) (for example: Basel 1 at about one degree WNW of open star cluster Messier 11 in Scutum) (Basel 1 is also known as the Apriamashvili cluster)
Messier 77 +8.9 radio galaxy 41 NGC 1232 +9.8 spiral galaxy 76 Messier 90 +9.5 spiral galaxy 77 NGC 1097 +9.5 galaxy interacting with its satellite 85 Whirlpool Galaxy (M51) +8.4 galaxy interacting with its satellite 116 Messier 60 +8.8 colliding galaxies 152 Virgo A (M87) +8.6 elliptical galaxy 153 Centaurus A (NGC 5128) +6.6 radio galaxy in a ...
Messier 55: 96 [18] NGC 265: 94 [19] Open cluster: Messier 69: 90 [20] Globular cluster: Messier 9: 90 [21] Messier 56: 84 [22] Messier 10: 83.2 [23] NGC 3201: 80 [24] Messier 107: 79 [25] Messier 46: 75.6 [26] Open cluster: Messier 4: 75 [27] Globular cluster: Nearest globular cluster to the Earth. Also the first globular cluster known to have ...
Using this technique, ages for the Pleiades of between 75 and 150 million years have been estimated. The wide spread in estimated ages is a result of uncertainties in stellar evolution models, which include factors such as convective overshoot , in which a convective zone within a star penetrates an otherwise non-convective zone, resulting in ...
The Little Dumbbell Nebula, also known as Messier 76, NGC 650/651, the Barbell Nebula, or the Cork Nebula, [1] is a planetary nebula in the northern constellation of Perseus. It was discovered by Pierre Méchain in 1780 and included in Charles Messier 's catalog of comet -like objects as number 76.
The Small Sagittarius Star Cloud (also known as Messier 24 and IC 4715) is a star cloud in the constellation of Sagittarius approximately 600 light years wide, which was catalogued by Charles Messier in 1764. [4] The stars, clusters and other objects comprising M24 are part of the Sagittarius or Sagittarius-Carina arms of the Milky Way galaxy ...