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IC 443 (also known as the Jellyfish Nebula and Sharpless 248 ) is a galactic supernova remnant (SNR) in the constellation Gemini. On the plane of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth. IC 443 may be the remains of a supernova that occurred 30,000 - 35,000 years ago.
The Medusa Nebula is a planetary nebula in the constellation of Gemini. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell , who classified it as an old planetary nebula. [ 4 ]
Gemini: Designations: IC 444, DG 100, LBN 840, Ced 74. See also: Lists of nebulae: IC 444 is a small, 32 square arcminute reflection nebula in the constellation Gemini.
NGC 2371-2 is a dual lobed planetary nebula located in the constellation Gemini.Visually, it appears like it could be two separate objects; therefore, two entries were given to the planetary nebula by John Louis Emil Dreyer in the New General Catalogue, so it may be referred to as NGC 2371, NGC 2372, or variations on this name. [1]
Gemini is dominated by Castor and Pollux, two bright stars that appear relatively very closely together forming an o shape, encouraging the mythological link between the constellation and twinship. The twin above and to the right (as seen from the Northern Hemisphere) is Castor, whose brightest star is α Gem; it is a second-magnitude star and ...
Eta Geminorum (η Geminorum, abbreviated Eta Gem, η Gem), formally named Propus / ˈ p r oʊ p ə s /, [16] [14] is a triple star system in the constellation of Gemini. It is a variable star visible to the naked eye , around 380 light years from the Sun .
Geminga underwent a minor glitch in the late part of 1996, with a fractional change in frequency of 6.2 × 10 −10. [17]A 1998 study of the pre-glitch ephemeris suggested that the timings were being affected by reflex motion due to the presence of a low-mass planet in a 5.1-year orbit; [18] however, this was later shown to be an artifact of noise that affects the pulse times from Geminga ...
Pollux is the brightest star in the constellation of Gemini. It has the Bayer designation β Geminorum , which is Latinised to Beta Geminorum and abbreviated Beta Gem or β Gem . This is an orange-hued, evolved red giant located at a distance of 34 light-years , making it the closest red giant (and giant star ) to the Sun.