All articles starting with a number or symbol
13,599 articles
297 Caecilia
297 Caecilia, main-belt asteroid discovered 9 September 1890 by Auguste Charlois at Nice; ~39.5 km diameter, albedo 0.18, rotation 4.15 h, orbital period 5.64 years; name origin unknown.
298 Baptistina
298 Baptistina, a 10-12 km inner main-belt asteroid, names the Baptistina asteroid family once proposed as the source of the Chicxulub dinosaur-killing impactor; composition and age data now disfavor that link.
299 Thora
299 Thora (雷神星), main-belt asteroid discovered 6 October 1890 by Johann Palisa at Vienna, named after the Norse god Thor. Diameter about 15.8 km, rotation period 272.9 hours, orbital period 3.8 years, not potentially hazardous.
29P/Schwassmann-Wachmann 1
29P/Schwassmann-Wachmann 1 (29P/SW1), a ~60 km continually active cryovolcanic Centaur comet on a near-circular ~6 AU, 14.6-year orbit beyond Jupiter, discovered 1927, known for frequent CO-driven outbursts.
29th Annual D.I.C.E. Awards
29th Annual D.I.C.E. Awards, presented by the Academy of Interactive Arts & Sciences on February 12, 2026 in Las Vegas; Clair Obscur: Expedition 33 won Game of the Year and five awards total, with Evan Wells inducted into the Hall of Fame.
29th Critics' Choice Awards
29th Critics' Choice Awards, January 14, 2024, Barker Hangar, Santa Monica, hosted by Chelsea Handler on The CW; Oppenheimer won 8 awards including Best Picture, Barbie won 6 with a record 18 nominations, and Succession, The Bear, and Beef led television.
29th Infantry Division (United States)
The 29th Infantry Division ("Blue and Gray") is a US Army National Guard division at Fort Belvoir, Virginia, created in 1917, fought at Meuse-Argonne and led the D-Day assault on Omaha Beach, now overseeing seven Guard brigades.
29th Moscow International Film Festival
The 29th Moscow International Film Festival (XXIX ММКФ), held 21–30 June 2007 in Moscow, opened with Kusturica's Promise Me This and awarded its Golden St. George to Vera Storozheva's Travelling with Pets.
29th National Geographic Bee
29th National Geographic Bee (2017): annual US grades 4-8 geography competition won by Pranay Varada, 14, of Texas on a Kunlun Mountains tiebreaker over Thomas Wright; hosted by Mo Rocca in Washington, D.C.
29th Screen Actors Guild Awards
The 29th Screen Actors Guild Awards honored 2022 film and television performances on February 26, 2023 in Los Angeles, with Everything Everywhere All at Once the top film winner.
2A46 125 mm gun
The 2A46, factory designation D-81TM, is a Soviet 125 mm smoothbore tank gun that has armed the T-64, T-72, T-80, and T-90 families since the 1970s.
2A65 Msta-B
The 2A65 Msta-B is a Soviet 152 mm towed gun-howitzer accepted into service in 1986; over 1,200 were built and it remains in service with Russia, Belarus, and Ukraine.
2Africa (submarine cable)
2Africa is a submarine communications cable led by Meta that encircles Africa and connects it to Europe, the Middle East, and Asia; at 45,000 kilometers, it links 33 countries.
2AM (band)
2AM (투에이엠) is a four-member South Korean ballad boy band (Jo Kwon, Seulong, Changmin, Jinwoon) that debuted in 2008 under JYP Entertainment, formed from the One Day trainee pool alongside 2PM, and co-managed by Big Hit from 2010.
2B (Nier: Automata)
2B, formally YoRHa No. 2 Type B, is a fictional battle android and protagonist of the 2017 action role-playing game NieR: Automata by PlatinumGames and Square Enix.
2b2t
2b2t (2builders2tools) is Minecraft's oldest anarchy server, founded December 2010 by Hausemaster, with no map resets, an 80 TB world, a paid priority queue since the 2016 Rusher influx, and Mojang-prompted rules added December 2025.
2B9 Vasilek
The 2B9 Vasilek is a Soviet 82 mm automatic mortar, breech-loaded and fed from 4-round clips, mounted on a towed carriage or on MT-LB, in service from 1970.
2Baba
2Baba (Innocent Ujah Idibia; formerly 2face/Tuface Idibia), Nigerian singer born in Jos, Plantashun Boiz member whose 2004 hit 'African Queen' made him a pioneer of Afrobeats; five Headies, one BET, UNHCR Goodwill Ambassador.
2C-B
2C-B is a synthetic psychedelic phenethylamine first synthesized by Alexander Shulgin in 1974, known on the street as Nexus and Bromo, producing effects from euphoria to LSD-like hallucinations.
2C-D
2C-D (2,5-dimethoxy-4-methylphenethylamine, LE-25) is a psychedelic 2C-series phenethylamine first synthesized in published form in 1970, studied by Hanscarl Leuner as a psychotherapeutic adjunct, and a US Schedule I substance.
2C-E
2C-E, or 2,5-dimethoxy-4-ethylphenethylamine, is a synthetic psychedelic phenethylamine of the 2C family, synthesized by Alexander Shulgin in 1977 and controlled as Schedule I in the United States.
2C-P
2C-P, or 2,5-dimethoxy-4-(n)-propylphenethylamine, is a synthetic hallucinogenic phenethylamine of the 2C series, described in Shulgin's PiHKAL as active at 6 to 10 mg for 10 to 16 hours.
2Cellos (ΞLLOS)
2Cellos (2CELLOS), Croatian classical crossover cello duo of Luka Šulić and Stjepan Hauser, formed 2011 in Zagreb; viral Smooth Criminal cover, six Sony Masterworks albums, Billboard classical number ones, farewell tour 2022.
2channel (2ちゃんねる)
2channel (2ちゃんねる) was a Japanese anonymous textboard founded by Hiroyuki Nishimura in 1999 that became Japan's largest bulletin board and inspired 4chan; it was renamed 5channel in 2017.
2D antiferromagnetism in MnPS3 and FePS3
2D antiferromagnetism in MnPS3 and FePS3 is antiferromagnetic order persisting in atomically thin layers of these van der Waals magnets, with Néel temperatures of 78 K and 120 K.
2D computer graphics
2D computer graphics, or two-dimensional computer graphics, is the branch of computing that generates and displays images on a flat plane, using raster and vector representations, and dates to the 1950s.
2D echocardiography
2D echocardiography is an ultrasound method producing real-time cross-sectional views of the beating heart; it is the first-line cardiac imaging test, inexpensive, portable, and non-invasive.
2D ferromagnetism in CrI3
2D ferromagnetism in CrI3 is the intrinsic long-range magnetic order in atomically thin chromium triiodide, first demonstrated in 2017, with Ising spins pointing out of the layer plane.
2D ferromagnetism in monolayer CrBr3
2D ferromagnetism in monolayer CrBr3 is ferromagnetic ordering in a single atomic layer of chromium tribromide, a layered semiconductor, with a Curie temperature of 16 to 34 K.
2D hybrid perovskite ferroelectrics
2D hybrid perovskite ferroelectrics are layered organic-inorganic crystals whose spontaneous polarization can be switched by an electric field; the first was reported in 2015, and more than seventy are known.