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The Andromeda Galaxy is visible to the naked eye in dark skies. Around the year 964 CE, the Persian astronomer Abd al-Rahman al-Sufi was the first to formally describe the Andromeda Galaxy. He referred to it in his Book of Fixed Stars as a "nebulous smear" or "small cloud". Star charts of that period labeled it as the Little Cloud.
The most famous deep-sky object in Andromeda is the spiral galaxy cataloged as Messier 31 (M31) or NGC 224 but known colloquially as the Andromeda Galaxy for the constellation. M31 is one of the most distant objects visible to the naked eye, 2.2 million light-years from Earth (estimates range up to 2.5 million light-years).
Naked eye, also called bare eye or unaided eye, ... h/χ Persei, the Andromeda Galaxy, the Carina Nebula, the Orion Nebula, Omega Centauri, 47 Tucanae, ...
Naked-eye galaxies Galaxy Apparent Magnitude Distance Constellation Notes Milky Way: −6.5: 0 Sagittarius (centre) This is the galaxy containing the Sun and its Solar System, and therefore Earth. Most things visible to the naked eye in the sky are part of it, including the Milky Way composing the Zone of Avoidance. Large Magellanic Cloud: 0.9
Gamma Andromedae, Latinized from γ Andromedae, is the third-brightest point of light in the northern constellation of Andromeda. It is a multiple star system approximately 350 light-years from Earth. The system is drifting closer to the Sun with a radial velocity in the range of −12 to −14 km/s. [5]
Nu Andromedae. Nu Andromedae ( Atropabella by Alicia, Nu And, ν Andromedae, ν And) is a binary star in the constellation Andromeda. The system has an apparent visual magnitude of 4.5, [2] which is bright enough to be seen with the naked eye. It is approximately 620 light-years (190 parsecs) from Earth. [1] Situated just over a degree to the ...
38° 40′ 12″. 9.9. M5e-M6e. a variable star in the constellation of Andromeda. It is classified as a semiregular variable pulsating giant star, and varies from an apparent visual magnitude of 14.5 at minimum brightness to a magnitude of 9.9 at maximum brightness, with a period of approximately 238.3 days. [17] [18]
Alpheratz / ælˈfɪəræts /, [13] [14] or Alpha Andromedae ( α Andromedae, abbreviated Alpha And or α And ), is a binary star 97 light-years from Earth and is the brightest star in the constellation of Andromeda when Mirach (β Andromedae) undergoes its periodical dimming. Immediately northeast of the constellation of Pegasus, it is the ...