Orion (ìgwè kpakpando)
Orion bụafa a ma nke a na-ahụ n'oge oyi n'ebe ugwu nke mbara igwe. Ọ bụ otu n'ime mkpọ 88 nke oge a; ọ bụ otu n'ime mfọn 48 nke onye na-egosi mbara igwe nke njọ nke abụọ bụ Ptolemy depụtara. Akpọrọ ya aha maka dinta na okpukpe ifo ndị Gris .
Orion kacha pụta ìhè n'oge mgbede oyi na Northern Hemisphere, , ike mịmịka ise ndị ọzọ nwere ike na Winter Hexagon asterism . Kpakpando abụọ kacha kacha na- Mamaka ndị nke Orion, Rigel (β) na Betelgeuse (α), so na mmetụta na-akpa na mbara igwe; ha bụ ndị supergiants na iwu. Enwere ndị isii ọzọ na-ahụ ụfọdụ ndị ndọrọ ndọrọ 3.0, apụ atọ na-eme ogologo ahịrị ogologo nke Orion's Belt asterism . Orion na-anabatakwa Orionids, mmiri mmiri mmiri meteor ozi ike àmà ya na Halley's Comet, na Orion Nebula, otu n'ime nebula na-akpa na mbara igwe.
- Betelgeuse, also designated Alpha Orionis, is a massive M-type red supergiant star nearing the end of its life. It is the second brightest star in Orion, and is a semiregular variable star.[1] It serves as the "right shoulder" of the hunter (assuming that he is facing the observer). It is generally the eleventh brightest star in the night sky, but this has varied between being the tenth brightest to the 23rd brightest by the end of 2019.[2][3] The end of its life is expected to result in a supernova explosion that will be highly visible from Earth, possibly outshining the Earth's moon and being visible during the day. This is most likely to occur within the next 100,000 years.[4]
- Rigel, also known as Beta Orionis, is a B-type blue supergiant that is the sixth brightest star in the night sky. Similar to Betelgeuse, Rigel is fusing heavy elements in its core and will pass its supergiant stage soon (on an astronomical timescale), either collapsing in the case of a supernova or shedding its outer layers and turning into a white dwarf. It serves as the left foot of the hunter.[5]
- Bellatrix is designated Gamma Orionis by Johann Bayer. It is the twenty-seventh brightest star in the night sky. Bellatrix is considered a B-type blue giant, though it is too small to explode in a supernova. Bellatrix's luminosity is derived from its high temperature rather than a large radius.[6] Bellatrix marks Orion's left shoulder and it means the "female warrior", and is sometimes known colloquially as the "Amazon Star".[7] It is the closest major star in Orion at only 244.6 light years from our solar system.
- Mintaka is designated Delta Orionis, despite being the faintest of the three stars in Orion's Belt. Its name means "the belt". It is a multiple star system, composed of a large B-type blue giant and a more massive O-type main-sequence star. The Mintaka system constitutes an eclipsing binary variable star, where the eclipse of one star over the other creates a dip in brightness. Mintaka is the westernmost of the three stars of Orion's Belt, as well as the northernmost.[8]
- Alnilam is designated Epsilon Orionis and is named for the Arabic phrase meaning "string of pearls".[8] It is the middle and brightest of the three stars of Orion's Belt. Alnilam is a B-type blue supergiant; despite being nearly twice as far from the Sun as the other two belt stars, its luminosity makes it nearly equal in magnitude. Alnilam is losing mass quickly, a consequence of its size. It is the farthest major star in Orion at 1,344 light years.
- Alnitak, meaning "the girdle", is designated Zeta Orionis, and is the easternmost star in Orion's Belt. It is a triple star system, with the primary star being a hot blue supergiant and the brightest class O star in the night sky.
- Saiph is designated Kappa Orionis by Bayer, and serves as Orion's right foot. It is of a similar distance and size to Rigel, but appears much fainter. It means the "sword of the giant"
- Meissa is designated Lambda Orionis, forms Orion's head, and is a multiple star with a combined apparent magnitude of 3.33. Its name means the "shining one".
- ↑ Variable Star of the Month, Alpha Ori. Variable Star of the Season. American Association of Variable Star Observers (2000). Archived from the original on January 22, 2009. Retrieved on 2009-02-26.
- ↑ Waiting for Betelgeuse: What's Up with the Tempestuous Star? (December 26, 2019).
- ↑ Dolan. Betelgeuse. Archived from the original on 2011-11-24. Retrieved on 2023-08-06.
- ↑ Prior (26 December 2019). A giant red star is acting weird and scientists think it may be about to explode. CNN.
- ↑ Rigel. Jim Kaler's Stars. University of Illinois at Urbana–Champaign (2009). Archived from the original on February 22, 2009. Retrieved on 2009-02-26.
- ↑ Bellatrix. Jim Kaler's Stars. University of Illinois at Urbana–Champaign (2009). Archived from the original on February 22, 2009. Retrieved on 2009-02-26.
- ↑ Dolan. Bellatrix. Archived from the original on 2011-11-30. Retrieved on 2023-08-06.
- ↑ 8.0 8.1 Staal 1988, p. 61.