All articles starting with G
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Gliese 388
Gliese 388 (AD Leonis, AD Leo) is a nearby M3.5 flare star 4.97 pc away in Leo, famous for the 1985 great flare and a 2021 superflare; its reported hot Jupiter was refuted as stellar activity.
Gliese 402
Gliese 402 (GJ 402, EE Leonis, Wolf 358) is an M4.0 V red dwarf in Leo, a BY Draconis variable among the 100 nearest star systems, with parallax 143.5 mas, V 11.65, and mass about 0.20 solar masses.
Gliese 412
Gliese 412 (GJ 412) is a binary red dwarf system in Ursa Major, 15.8 light years away; component A is HIP 54211, component B is the M5.5Ve flare star WX UMa, which flared 1.6 mag in 1940.
Gliese 445
Gliese 445 (GJ 445, AC +79 3888) is a single M4.0V red dwarf about 17 light-years away in Camelopardalis, approaching the Sun at 111.5 km/s; Voyager 1 will pass within 1.7 light-years of it in about 40,000 years.
Gliese 48
Gliese 48 (GJ 48, HIP 4856, Ross 318) is a nearby M3.5V red dwarf about 28 light-years away hosting Gliese 48 b, a temperate super-Earth of minimum mass 8.11 Earth masses in a 39.63-day orbit, discovered by radial velocity in 2026.
Gliese 570
Gliese 570 (GJ 570), a K4V + M1.5-M3V ternary star system about 5.8 pc away, with the T7.5/T8 brown dwarf companion Gliese 570 D, a benchmark object for brown dwarf atmospheric retrieval studies.
Gliese 581
Gliese 581 (GJ 581) is a red dwarf star about 20 light-years from Earth in Libra, whose planets were found by radial velocity and long described as potentially habitable.
Gliese 588
Gliese 588, also known as GJ 588, is a red dwarf star of spectral type M2.5 in Lupus, about 19.3 light-years away, with no confirmed planets.
Gliese 65
Gliese 65 (Luyten 726-8, BL Ceti + UV Ceti) is the sixth closest star system, a pair of flaring M5.5/M6 red dwarfs 8.7 light-years away in Cetus, orbiting every 26.4 years with strong magnetic fields and a Neptune-mass planet candidate.
Gliese 661
Gliese 661 (GJ 661, HD 155876) is a nearby M3V red dwarf spectroscopic binary in Hercules, about 6 parsecs away, with parallax 167.29 mas, radial velocity -30.9 km/s, and high proper motion.
Gliese 693
Gliese 693 (GJ 693) is a red dwarf flare star about 19 light years from the Sun in Pavo, with high proper motion and no known exoplanets.
Gliese 752
Gliese 752 (GJ 752, Wolf 1055) is a binary of two red dwarfs about 5.9 pc away in Aquila: primary HD 180617 (V1428 Aql, M2.5V) and faint companion VB 10 (M8V); site of a 1995 Hubble dynamo study and a disputed 2009 astrometric planet claim.
Gliese 754
Gliese 754 (Gl 754, GJ 754) is an M4 V red dwarf in the Gliese nearby-star catalogue, parallax 19.2724 mas, V magnitude about 12.25; distinct from Gliese 754.1 and from Kepler-754.
Gliese 825
Gliese 825, also called LaCaille 8760, is an M1.5V red dwarf 12.87 light-years away, magnitude 6.67, luminosity 0.13 and mass 0.361 solar, catalogued in the Gliese Catalogue of Nearby Stars.
Gliese Catalogue of Nearby Stars
The Gliese Catalogue of Nearby Stars, also known as the Gliese–Jahreiss catalog, lists stars closest to the Sun. First published in 1957, it is compiled in Heidelberg.
Glilot Capital
Glilot Capital, also known as Glilot Capital Partners, is an Israeli venture capital firm founded in 2011 that invests in cybersecurity, enterprise software, and AI startups.
Glima
Glíma, Iceland's national folk wrestling, an upright belt-wrestling style with Lausatök, Brökartök, and Hryggspenna variants, belt-and-thigh harness, 1325 Jonsbok record, and 1912 Stockholm Olympic competitions.
Glimepiride
Glimepiride is a third-generation sulfonylurea oral antidiabetic drug, U.S. approved 1995, for type 2 diabetes as adjunct to diet and exercise; dosed 1-8 mg daily, limited by hypoglycemia and weight gain.
Glims 4-H Farm Animal Yard
Glims 4-H Farm Animal Yard (Glimsin 4H-kotieläinpiha), a summer petting farm at Glims Farmstead Museum, Bemböle, Espoo, Finland, run by the Helsinki Region 4H Association with sheep, goats, rabbits, chickens, free pasture visits, camps, and Animal Days.
Glinda
Glinda, also Glinda the Good, is L. Frank Baum's Good Witch of the South in Oz, later the pink-gowned 1939 MGM figure and the Galinda of Wicked, played by Ariana Grande in the 2024-2025 films.
Glines Canyon Dam
Glines Canyon Dam, also known as the Glines Canyon Hydroelectric Power Plant, was a 210-foot concrete arch dam on Washington's Elwha River, built in 1927 and removed by 2014.
Glinka (Mercurian crater)
Glinka is an 86-km-wide impact crater on Mercury in the Beethoven quadrangle (H-07), IAU-named in 2008 for Russian composer Mikhail Glinka; it hosts a candidate pyroclastic vent, hollows, and spectrally diverse ejecta.
Glioblast (sensu Vertebrata)
Glioblast (sensu Vertebrata), Cell Ontology term CL:0000339 and ZFIN ZFA:0009169, is a vertebrate neuroectoderm-derived precursor cell that differentiates into astrocytes and oligodendrocytes; distinct from glioblastoma and from the invertebrate glioblast.
Glioblastoma
Glioblastoma (GBM, glioblastoma multiforme, grade IV astrocytoma): the most common and aggressive primary adult brain tumor, a fast-growing glial CNS neoplasm treated with surgery, radiotherapy, and temozolomide; median survival about 15 months.
Gliocladium
Gliocladium (Corda 1840) is an asexual fungal genus in Hypocreaceae with penicillate conidiophores and slimy conidial heads. Former species were split into Clonostachys, Trichoderma, and others; several species are biocontrol agents producing gliotoxin.
Glioma
Glioma: tumors of glial cells in the brain and spinal cord; main types astrocytoma, oligodendroglioma, ependymoma. Classified by WHO CNS5 (2021) using IDH mutation and 1p/19q codeletion; treated with surgery, radiotherapy, chemotherapy, and new IDH inhibitors.
Gliomas of brain
Gliomas of brain: tumors arising from glial or precursor cells of the CNS, also called glial tumors. Classified by 2021 WHO into adult-type diffuse gliomas (astrocytoma IDH-mutant, oligodendroglioma 1p/19q-codeleted, glioblastoma IDH-wildtype) and pediatric, circumscribed, and other groups; graded I to IV.
Gliomatosis cerebri
Gliomatosis cerebri, a rare diffusely infiltrating glioma growth pattern spanning three or more brain lobes, removed as a distinct WHO entity in 2016; median survival about 13 months.
Gliosis
Gliosis (astrogliosis, astrocytosis, glial scar): reactive proliferation and hypertrophy of neuroglia, mainly astrocytes, after CNS injury, stroke, infection, epilepsy, or neurodegenerative disease, marked by GFAP upregulation.
Gliotoxin
Gliotoxin (GT) is a sulfur-containing fungal secondary metabolite of the epidithiodiketopiperazine class, first isolated in 1936 and the best-studied mycotoxin of the human pathogen Aspergillus fumigatus.