All articles starting with G
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GJ 514
GJ 514 (Gl 514, HIP 65859) is a nearby M0.5-1.0 V red dwarf 7.6 pc away hosting GJ 514 b, a 5.2 Earth-mass super-Earth on a 140.43-day eccentric (e=0.45) orbit, discovered by radial velocity in 2022, partially in the habitable zone.
GJ 536
GJ 536 is a nearby M dwarf about 10 parsecs away with two confirmed Neptune-like low-mass planets: GJ 536 b (6.4 Earth masses, 8.7-day orbit) and GJ 536 c (5.9 Earth masses, 32.8-day orbit), both found by radial velocity.
GJ 625
GJ 625 (HIP 80459, Gliese 625) is a quiet M2 V red dwarf 21.1 light-years away in Draco, hosting the 2017-discovered super-Earth GJ 625 b, a 2.82 Earth-mass planet on a 14.6-day orbit at 0.078 AU, debated as habitable-zone inner edge versus super-Venus.
GJ 667 C
GJ 667 C (Gliese 667C), red dwarf M1.5V star about 22 light-years away in Scorpius, third member of the GJ 667 triple system; hosts confirmed super-Earth GJ 667 C c in its habitable zone plus disputed additional planets.
GJ 674
GJ 674, also catalogued as a Gliese-Jahreiss nearby star, is an M2.5 red dwarf 4.55 parsecs away with one confirmed Neptune-mass planet, GJ 674 b (11.09 Earth masses, 4.69-day period), found by radial velocity in 2007; a 35-day signal is stellar rotation, not a planet.
GJ 676 A
GJ 676 A (Gl 676A) is an M0V red dwarf 16 parsecs away in Ara, primary of a wide binary, hosting four radial-velocity planets: super-Earths d and e and gas giants b and c.
GJ 680
GJ 680 (HIP 86057) is a nearby K5/M1.5 red dwarf about 32 light-years away hosting GJ 680 b, a 25.1-Jupiter-mass gas giant on a 47.3-year, 10.138 AU eccentric orbit, found in 2022 by Feng et al. via radial velocity and astrometry.
GJ 682
GJ 682 (Gliese-Jahreiβ catalogue entry 682) is a nearby M3.5-M4 red dwarf 5.007 parsecs away with two confirmed radial-velocity super-Earth planets, GJ 682 b (17.48 d, habitable zone) and GJ 682 c (57.32 d), found by Tuomi et al. in 2014.
GJ 687
GJ 687 (Gliese 687), a nearby M3V red dwarf 4.55 pc from the Sun in Draco, hosts two Neptune-mass radial-velocity planets: GJ 687 b (38.14-day period, found 2014) and GJ 687 c (727.56-day period, found 2020).
GJ 806
GJ 806 (TOI-4481) is a nearby M1.5 V red dwarf in Cygnus, about 39 light-years away, with two confirmed 2023 planets: transiting hot super-Earth GJ 806 b (0.93-day orbit) and non-transiting GJ 806 c (6.64 days).
GJ 832
GJ 832 (HD 204961), nearby M2V red dwarf in Grus, 16.2 light-years away, hosts the confirmed Jupiter-like gas giant GJ 832 b (0.99 Jupiter masses, 10.6-year orbit); its claimed habitable-zone super-Earth GJ 832 c was refuted as a stellar-activity false positive.
GJ 849
GJ 849, also cataloged as BD-05 5715, is a nearby M3.5 red dwarf 8.8 parsecs away with two confirmed Jupiter-mass planets found by radial velocity: GJ 849 b (2006, 5.3-year orbit) and GJ 849 c (about 15-year orbit).
GJ 86
GJ 86 (Gliese 86, HD 13445) is a nearby K-type star about 35 light-years from the Sun, hosting a giant planet and a white dwarf companion.
GJ 876
GJ 876, also cataloged as Gliese 876, is a nearby red dwarf about 15 light-years away hosting four planets, including two locked in a 2:1 orbital resonance.
GJ 887
GJ 887 (HD 217987) is the brightest visible red dwarf, 10.7 light-years away, with four confirmed radial-velocity planets: super-Earths b, c, habitable-zone d, and Earth-mass e, plus a candidate fifth signal.
GJ 900 A
GJ 900 A (Gliese 900 A) is the K7 primary of a nearby (~20.8 pc, Pisces) young hierarchical triple star system that hosts the directly imaged 11-Jupiter-mass T9 companion GJ 900 b at 12,000 au, discovered in 2024.
GJ 9827
GJ 9827 (K2-135) is a nearby K6V star ~30 parsecs away with three transiting planets in near 1:3:5 resonance, discovered by K2 in 2017; planet d is a water-rich sub-Neptune with HST and JWST water detections.
GJA1
GJA1 (connexin 43, Cx43) is a human chromosome 6 gene encoding the major cardiac gap junction protein; mutations cause oculodentodigital dysplasia, craniometaphyseal dysplasia, EKVP3, and heart malformations.
Gjakova
Gjakova (Gjakovë, Đakovica) is a city in western Kosovo, seat of Gjakova District, known for its Ottoman-era Grand Bazaar (Çarshia e Madhe), largely burned in 1999 and rebuilt; municipality 78,824 residents per the 2024 census.
Gjallarhorn
Gjallarhorn (Old Norse, "the resounding horn") is Heimdall's signal horn in Norse mythology, heard in all worlds; it warns of crossings of Bifrost and is blown at Ragnarök, and also appears as Mímir's drinking horn.
Gjalt Smit
Gjalt Smit is a Dutch physicist who served as the first managing director of ASML, the lithography joint venture of Philips and ASM International, from 1984 to 1987.
GJB 9001C
GJB 9001C-2017 is a Chinese national military standard specifying quality management system requirements for organizations developing, producing, and servicing military equipment, effective 1 July 2017.
GJB1
GJB1 (connexin 32, Cx32) is an Xq13.1 gene encoding a gap junction protein of Schwann cells and oligodendrocytes; its 400-plus mutations cause CMT1X, the second most common Charcot-Marie-Tooth neuropathy.
GJB2
GJB2 (gap junction protein beta 2, connexin 26, DFNB1/DFNA3) is a chromosome 13 gene whose biallelic variants are the leading cause of autosomal recessive nonsyndromic hearing loss; common variants include c.35delG, c.235delC, M34T, and V37I.
GJB3
GJB3 (connexin 31, CX31) is a human connexin gene at 1p34.3 encoding gap junction protein beta 3. Mutations cause erythrokeratodermia variabilis (ClinGen Definitive) and disputed nonsyndromic hearing loss 2B.
GJB6
GJB6 (connexin 30, gap junction protein beta 6), gene on chromosome 13q12; mutations cause Clouston syndrome (hidrotic ectodermal dysplasia 2, nail dystrophy, alopecia, palmoplantar hyperkeratosis); deletions implicated in DFNB1 hearing loss.
Gjergj Arianiti
Gjergj Arianiti was a 15th-century Albanian feudal lord who led the earliest sustained resistance to Ottoman rule in Albania, a decade before his son-in-law Skanderbeg, whom he joined in the League of Lezha in 1444.
Gjergj Fishta
Gjergj Fishta (1871–1940) was an Albanian Franciscan friar, poet, and politician, author of the national epic Lahuta e Malcís, banned under communism and rehabilitated in the 1990s.
Gjin Bua Shpata
Gjin Bua Shpata was an Albanian despot who ruled lands in Epirus and western Greece from about 1359, holding Arta from 1374 until his death in 1399.
Gjirokastër
Gjirokastër (Argyrókastro, Ergiri), the 'City of Stone' in southern Albania's Drino valley: UNESCO-listed Ottoman stone tower houses, 13th-century Kalaja fortress, birthplace of Enver Hoxha and Ismail Kadare, 23,270 residents (2023), major Greek minority.