All articles starting with a number or symbol
13,599 articles
25 m
25 m: short course pool length in competitive swimming, half the Olympic 50 m course. Own world records since 1991; World Swimming Championships (25m) since 1993; next edition Beijing, 1-6 December 2026.
25 or 6 to 4
"25 or 6 to 4" is a 1970 Chicago rock song written by Robert Lamm, sung by Peter Cetera, titled for the time 25 or 26 minutes before 4 a.m.; US number 4, UK number 7.
25 Watts
25 Watts (2001) is the debut feature of Uruguayan directors Juan Pablo Rebella and Pablo Stoll, a black-and-white 16 mm comedy-drama following three idle Montevideo friends for 24 hours; it won the 2001 Rotterdam Tiger Award.
25-Hydroxycholesterol
25-Hydroxycholesterol (25-HC) is an oxysterol, an oxygenated derivative of cholesterol formed mainly by the enzyme cholesterol 25-hydroxylase, that acts in cholesterol metabolism, inflammation, and antiviral defense.
25-pair color code
The 25-pair color code, also called the even-count color code, is a standard for identifying conductors in telephone cable, developed by Bell Laboratories in the 1950s.
25: The Ultimate Collection
25: The Ultimate Collection is Westlife's third greatest-hits album, released 8 May 2026 by Sony Music Catalog for the band's 25th anniversary; it peaked at number 2 on the UK Official Albums Chart and adds four new tracks including Chariot.
250 Bettina
250 Bettina is a large main-belt asteroid about 80 to 120 km across, discovered by Johann Palisa at Vienna in 1885 and named for Baroness Bettina von Rothschild.
251 Sophia
251 Sophia (A885 TA), a 27.5-km main-belt asteroid discovered 4 October 1885 by Johann Palisa in Vienna, named for Sophie von Seeliger; orbits at 3.1 au with a 5.46-year period.
25143 Itokawa
25143 Itokawa is a small near-Earth S-type asteroid, about 535 meters long, from which the Japanese spacecraft Hayabusa captured the first asteroid samples, returned to Earth in 2010.
252 Clementina
252 Clementina (A885 TB), a dark main-belt asteroid about 65 km across with albedo 0.047, orbiting at 3.16 AU every 5.61 years, rotating in 10.86 hours; not a hazardous or NHATS target.
253 Mathilde
253 Mathilde is a dark, heavily cratered C-type asteroid in the main belt between Mars and Jupiter, visited by NASA's NEAR spacecraft in a 1997 flyby.
253J
253J (253J-P, 253JP) is a human bladder carcinoma cell line from a metastatic retroperitoneal lymph node, established in 1974; parent of metastatic variants 253J-BV and 253J-Lung-IV.
254 Augusta
254 Augusta, provisional designation A886 FA, is an S-type main-belt asteroid discovered by Johann Palisa in Vienna on 31 March 1886. About 12.5 km across, it orbits the Sun every 3.25 years and rotates in 5.9 hours.
255 Oppavia
255 Oppavia (A886 FB) is a 57-km dark X-type main-belt asteroid discovered by Johann Palisa in 1886, named after Troppau (Opava), and an accepted interloper in the Gefion asteroid family.
256 Walpurga
256 Walpurga (provisional 1886 GA) is a large P-type main-belt asteroid, 64.83 km across, albedo 0.050, rotation period 16.66 hours, named after St. Walpurga.
256-atom programmable quantum simulator
The 256-atom programmable quantum simulator is a quantum device of 256 trapped rubidium-87 atoms, demonstrated in 2021 by a Harvard-led team with MIT and QuEra Computing.
256P/LINEAR
256P/LINEAR is a Jupiter-family periodic comet with a 9.97-year orbit, perihelion 2.69 AU, recovered in 2012 as 256P/2012 B2; not hazardous, no Earth close approaches.
258 Tyche
258 Tyche is an S-type, stony main-belt asteroid about 64.8 kilometers in diameter, discovered by R. Luther on 4 May 1886 and larger than 99% of cataloged asteroids.
259 Aletheia
259 Aletheia, asteroid 1886 MA, is a large dark X-type main-belt asteroid discovered 28 June 1886 by C. H. F. Peters at Clinton; about 185 km across, albedo 0.04, orbit a = 3.13 AU, period 5.55 years.
25937 Malysz
25937 Malysz (2001 DY92) is a Jupiter Trojan asteroid discovered 19 February 2001 by LONEOS at Anderson Mesa; about 15.13 km across, albedo 0.122, 12.24-year orbit at 4.96-5.66 AU, no close Earth approaches.
25938 Stoch
25938 Stoch (2001 DC102), a Jupiter Trojan asteroid about 15.4 km in diameter sharing Jupiter's orbit; period 11.69 years, perihelion 4.30 AU, not a near-Earth or hazardous object.
2594 Acamas
2594 Acamas, provisional designation 1978 TB, is a dark Jupiter Trojan asteroid about 26 km across, discovered in 1978 and named for a warrior in Greek mythology.
25band
25band (۲۵ باند) is an Iranian pop duo formed in 2010 in Mashhad by the married couple Tamin and A-del, who blend Persian traditional music with modern pop from Los Angeles.
25I-NBOMe
25I-NBOMe, also called Cimbi-5 or NBOMe-2C-I, is a potent synthetic hallucinogen first synthesized in 2003 and sold on blotter paper, often mis-sold as LSD.
25th Annual Grammy Awards
The 25th Annual Grammy Awards, held February 23, 1983, at the Shrine Auditorium in Los Angeles, marked the ceremony's 25th anniversary, with Toto winning six Grammys including Album of the Year.
25th Hour
25th Hour (2002) is Spike Lee's drama, adapted by David Benioff from his novel, about drug dealer Monty Brogan's last day before a seven-year prison sentence, set in post-9/11 New York with Edward Norton, Philip Seymour Hoffman, Barry Pepper, and Rosario Dawson.
25th Infantry Division (United States)
The 25th Infantry Division ("Tropic Lightning"), a U.S. Army division activated 1 October 1941 at Schofield Barracks, Hawaii, fought in WWII, Korea, Vietnam, and Iraq/Afghanistan, and now leads Pacific transformation.
25th Screen Actors Guild Awards
25th Screen Actors Guild Awards (SAG Awards), silver-anniversary ceremony held Jan. 27, 2019 at the Shrine Auditorium, hosted by Megan Mullally; Black Panther won cast, Malek and Close won lead film acting, Alan Alda received the 55th Life Achievement Award.
25th Transport Aviation Brigade (Ukraine)
The 25th Transport Aviation Brigade (25-та бригада транспортної авіації) is the heavy air transport unit of the Ukrainian Air Force, based at Melitopol and flying Il-76MD airlifters.
26 (number)
26 (twenty-six) is the even composite number between 25 and 27, the only integer directly between a perfect square and a perfect cube, and the atomic number of iron.