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Spacecraft design
Spacecraft design is the engineering discipline of creating a vehicle that carries a payload through launch, survives the space environment, and performs its mission by trading mass, power, cost, and reliability across every subsystem.
Spacecraft propulsion
Spacecraft propulsion, also called space propulsion, is the set of technologies a spacecraft uses to change velocity by expelling mass or momentum, with chemical, electric, nuclear, and propellantless families.
Spacecraft reentries, 1958–1969
Spacecraft reentries, 1958–1969 spans the first satellite decays to Apollo lunar returns at about 11 km/s, when reentry became routine and capsules were first recovered.
Spacecraft reentries, 2020–2023
Spacecraft reentries, 2020–2023 covers satellites, rocket stages, and debris returning to Earth's atmosphere, with cataloged objects rising from 878 in 2020 to 2,085 in 2023.
Spaced
Spaced is a British Channel 4 sitcom (1999–2001, 14 episodes) created by Simon Pegg and Jessica Hynes, directed by Edgar Wright, about strangers Tim Bisley and Daisy Steiner who pose as a couple to rent a North London flat, blending slacker realism with cinematic pop-culture homages.
Spaced Invaders
Spaced Invaders (1990), originally Martians!!!, is a Touchstone sci-fi comedy directed by Patrick Read Johnson, in which Martians mishear a War of the Worlds rebroadcast and land in Big Bean, Illinois on Halloween; grossed about $14.3 million.
Spaced learning
Spaced learning is a study method in which learning sessions are separated by time intervals rather than delivered back to back, exploiting the spacing effect to improve long-term retention.
Spaced repetition
Spaced repetition, also called spaced retrieval or distributed practice, schedules reviews of learned material at increasing time intervals to improve long-term retention. Rooted in Ebbinghaus's 1885 spacing effect, implemented in tools like Anki (SM-2, FSRS algorithms), and validated in large medical education trials.
Spaceflight
Spaceflight is the flight of vehicles into and through outer space, achieved by launching on rockets that carry their own propellant, spanning human and robotic spaceflight.
Spaceflight 1960–1964
Spaceflight 1960–1964 spans the Cold War space race's defining firsts: Yuri Gagarin's first orbit in 1961, John Glenn's first American orbital flight in 1962, and Syncom 3.
Spaceflight in the 1990s
Spaceflight in the 1990s saw the Space Shuttle become a routine workhorse, the launch of Hubble in 1990, and the start of the ISS assembly and Shuttle-Mir program.
Spaceflight osteopenia
Spaceflight osteopenia is the loss of bone mineral density that astronauts experience in microgravity, at about 1% to 1.5% per month in weight-bearing bones, raising fracture and osteoporosis risk.
Spaceflight participant
A spaceflight participant is a person flown aboard a launch or reentry vehicle who is not a crew member, the FAA and NASA's formal term for space tourists.
Spaceflight-associated neuro-ocular syndrome
Spaceflight-associated neuro-ocular syndrome (SANS), formerly known as visual impairment and intracranial pressure (VIIP) syndrome, is a collection of eye changes affecting astronauts on long-duration spaceflight, first described in 2011.
SpaceGhostPurrp
SpaceGhostPurrp (Markese Money Rolle, b. 1991), Miami rapper-producer from Carol City, founder of Raider Klan, 4AD debut Mysterious Phonk (2012), popularizer of phonk and 1990s Memphis revival sound.
Spacehog
Spacehog: English alternative rock band formed in New York City in 1994 by Leeds musicians Royston and Antony Langdon, Jonny Cragg, and Richard Steel; glam-influenced debut Resident Alien (1995) yielded the hit In the Meantime, later featured in Guardians of the Galaxy Vol. 3.
Spacehunter: Adventures in the Forbidden Zone
Spacehunter: Adventures in the Forbidden Zone is a 1983 American science fiction adventure comedy directed by Lamont Johnson, starring Peter Strauss, Molly Ringwald, and Michael Ironside, shot in 3-D.
Spacelab
Spacelab was a modular space laboratory developed by the European Space Agency for NASA's Space Shuttle, flying on 22 science missions from 1983 to 1998.
Spacelift (company)
Spacelift is a Polish infrastructure-as-code orchestration company founded in 2020 by Paweł Hytry and Marcin Wyszynski, which raised a $51 million Series C in July 2025.
Spacemaker (company)
Spacemaker was a Norwegian software startup founded in Oslo in 2016 that sold cloud-based AI for early-stage urban site design; Autodesk acquired it in 2020 for $240 million.
Spaceman (2024 film)
Spaceman (2024 film): Netflix sci-fi drama directed by Johan Renck, adapted from Jaroslav Kalfař's novel Spaceman of Bohemia, starring Adam Sandler as astronaut Jakub with Paul Dano voicing alien spider Hanuš.
Spacemen 3
Spacemen 3: English neo-psychedelic drone rock band formed 1982 in Rugby, Warwickshire by Sonic Boom (Pete Kember) and Jason Pierce (J Spaceman), motto "taking drugs to make music to take drugs to"; four albums, disbanded 1991.
SpacemiT
SpacemiT (进迭时空) is a Chinese RISC-V chip startup founded in Hangzhou in November 2021, developing full-stack RISC-V technology for edge AI, robotics, and cloud servers.
SpaceNews
SpaceNews is an American trade publication covering the global space industry since 1989, reporting on space companies, government agencies, technologies, and policy through a monthly magazine and daily online coverage.
Spaceplane
A spaceplane, also called an aerospace plane, is a vehicle that reaches space like a rocket but glides back to a runway landing like an aircraft.
Spaceport
A spaceport is a ground-based facility from which rockets launch into space, in the US a site licensed by the FAA; 28 have launched satellites to orbit since 1957.
Spaceport America
Spaceport America, also known as the Southwest Regional Spaceport, is an FAA-licensed commercial spaceport in Sierra County, New Mexico, built starting in 2009 as Virgin Galactic's home base.
Spaceports in the Middle East and Africa
Spaceports in the Middle East and Africa are rocket launch facilities, including Israel's Palmachim Airbase and Iran's Imam Khomeini Spaceport, while Africa has no active orbital site.
Spacer Woman
"Spacer Woman" is a 1983 electronic single recorded as Charlie by Vicenza musicians Maurizio Cavalieri and Giorgio Stefani; a commercial flop at release, it became a cult Italo disco and electro classic after 2000.
Spacesat (垣信卫星)
Spacesat, formally Shanghai Yuanxin Satellite Technology and also known as SpaceSail, is a Shanghai-based, state-backed satellite internet company founded in 2018 that operates the Qianfan broadband constellation.