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The Pleiades (/ ˈ p l iː. ə d iː z, ˈ p l eɪ-, ˈ p l aɪ-/), [8] [9] also known as Seven Sisters and Messier 45 (M45), is an asterism of an open star cluster containing young B-type stars in the northwest of the constellation Taurus.
The constellation Pleiades was of particular importance to the Navajo people. Not only was the celestial body ingrained in their mythology, but it served a greater utilitarian purpose. Pleiades’ progress across the sky throughout the winter months renders it a sort of celestial ‘clock’ for gauging the number of hours until dawn. [4]
Mosaic of 30 open clusters discovered from VISTA's data. The open clusters were hidden by the dust in the Milky Way. [6] Credit ESO.. The prominent open cluster the Pleiades, in the constellation Taurus, has been recognized as a group of stars since antiquity, while the Hyades (which also form part of Taurus) is one of the oldest open clusters.
In Indian astrology the Pleiades were known as the nakshatra Kṛttikā which in Sanskrit is translated as "the cutters". [76] The Pleiades are called the star of fire, and their ruling deity is the fire god Agni. It is one of the most prominent of the nakshatra and is associated with anger and stubbornness.
The Milky Way started out small and grew in size as it merged with other galaxies, gaining stars as well as hydrogen to form more stars. Each galaxy has hydrogen gas that aids in the birth of stars.
The poet Sappho mentions the Pleiades in one of her poems: The moon has gone The Pleiades gone In dead of night Time passes on I lie alone. The poet Lord Tennyson mentions the Pleiades in his poem "Locksley Hall": Many a night I saw the Pleiads, rising through the mellow shade, Glitter like a swarm of fire-flies tangled in a silver braid.
Milky Way star cloud ~10 Sagittarius: 2.5 2°x1° 18 h 17 m: −18° 33′ M25 [41] ... Pleiades, Seven Sisters or Subaru: Open cluster: 0.39–0.46 Taurus: 1.6 2 ...
Figure 1.The observed structure of the Milky Way's spiral arms [1]. The Orion Arm, also known as the Orion–Cygnus Arm, is a minor spiral arm within the Milky Way Galaxy spanning 3,500 light-years (1,100 parsecs) in width and extending roughly 20,000 light-years (6,100 parsecs) in length. [2]