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Spaceship Earth (Epcot)
Spaceship Earth, also known as the Epcot Ball, is a dark ride inside a large geodesic sphere at Epcot in Walt Disney World, Florida, opened in 1982.
SpaceShipOne
SpaceShipOne was a privately funded, rocket-powered suborbital aircraft built by Burt Rutan's Scaled Composites with Paul Allen's financing, becoming the first private crewed vehicle to reach space in 2004.
SpaceShipTwo
SpaceShipTwo is a reusable, air-launched, eight-seat suborbital rocket plane built for Virgin Galactic's space tourism program, carried aloft by White Knight Two and using a folding feather wing for reentry.
Spaceteam
Spaceteam is a free cooperative shouting party game for 2 to 8 players by Henry Smith, released November 29, 2012 on iOS and later Android, where players relay technobabble instructions before their ship explodes.
Spacetime
Spacetime, also called the space-time continuum, is the four-dimensional continuum unifying space and time into one manifold, developed by Hermann Minkowski in 1908 as the setting for relativity, where Einstein's equations make geometry respond to matter.
Spacetime algebra
Spacetime algebra (STA) is the Clifford algebra of Minkowski spacetime, introduced by David Hestenes in 1966 to unify spinors, tensors, and Lorentz transformations in one coordinate-free structure.
Spacetime symmetries
Spacetime symmetries are transformations that leave the metric of a spacetime unchanged, described in general relativity by Killing vector fields, each yielding a conserved quantity along free particles' paths.
Spacetime topology
Spacetime topology is the study of the global topological structure of spacetime in general relativity. Einstein's equations fix local curvature but say nothing about global topology.
Spacewar!
Spacewar! is a 1962 two-player space-combat video game written by Steve Russell and others at MIT on a DEC PDP-1, inspired by Doc Smith's Lensman novels; it seeded hacker culture and inspired Computer Space and Pong.
Spacewatch
Spacewatch is a University of Arizona research group, founded by Tom Gehrels and Robert McMillan in 1980, that observes asteroids and comets, especially near-Earth objects, from telescopes at Kitt Peak, Arizona.
SpaceWire
SpaceWire is a European spacecraft data-handling network standard developed under ESA auspices and standardized in 2003, used by NASA, JAXA, and Roscosmos missions including JWST and BepiColombo.
SpaceX
SpaceX, formally Space Exploration Technologies Corp., is an American spaceflight company founded by Elon Musk in 2002, now the dominant orbital launch provider and Starlink operator.
SpaceX acquisition of Anysphere
The SpaceX acquisition of Anysphere was a $60 billion all-stock purchase of Anysphere, maker of the Cursor AI coding assistant, agreed in June 2026 and completed that August.
SpaceX acquisition of xAI
The SpaceX acquisition of xAI was a February 2026 all-stock merger in which Elon Musk's SpaceX bought the Grok maker at a $250 billion valuation.
SpaceX Crew-1
SpaceX Crew-1, also known as USCV-1, was the first operational Commercial Crew mission, flying NASA and JAXA astronauts to the International Space Station from November 2020 to May 2021.
SpaceX Crew-11
SpaceX Crew-11 was the 11th SpaceX crew rotation mission to the International Space Station, flying four astronauts aboard the Crew Dragon Endeavour from August 2025 to January 2026.
SpaceX Crew-12
SpaceX Crew-12 was a 2026 NASA Commercial Crew mission to the International Space Station, carrying Jessica Meir, Jack Hathaway, Sophie Adenot, and Andrey Fedyaev for 237 days in orbit.
SpaceX Crew-13
SpaceX Crew-13 is the thirteenth SpaceX crew rotation mission to the International Space Station, launched for NASA on October 1, 2026 with four astronauts from three space agencies.
SpaceX Crew-9
SpaceX Crew-9 was a 2024 NASA Commercial Crew mission to the International Space Station that returned Boeing Starliner astronauts Butch Wilmore and Suni Williams to Earth in 2025.
SpaceX Dragon
SpaceX Dragon, also known as the Dragon spacecraft, is a reusable SpaceX capsule that carries cargo and astronauts to the International Space Station atop Falcon 9 rockets.
SpaceX Dragon 2
SpaceX Dragon 2, also called Crew Dragon, is a reusable SpaceX spacecraft that carries astronauts and cargo to the International Space Station, certified by NASA in 2020.
SpaceX IPO and Colossus compute revenue
SpaceX's June 2026 IPO, the largest in history, revealed more than $76 billion of contracted AI compute rent through 2029, mostly from Anthropic and Google, sparking a bubble debate.
SpaceX Merlin
The SpaceX Merlin, also known as the Merlin 1, is a family of kerosene and liquid oxygen rocket engines powering the Falcon 1, Falcon 9, and Falcon Heavy.
SpaceX Raptor
The SpaceX Raptor, or Raptor engine, is a liquid oxygen and liquid methane rocket engine developed by SpaceX, powering the Super Heavy booster and Starship upper stage.
SpaceX reusable launch system development program
The SpaceX reusable launch system development program is SpaceX's effort begun in the early 2010s to recover and re-fly rockets, achieving the first orbital booster landing in December 2015.
SpaceX rocket engines
SpaceX rocket engines are the liquid-propellant engines developed in-house by SpaceX to power the Falcon 1, Falcon 9, Falcon Heavy, and Starship rockets and the Dragon spacecraft.
SpaceX Starbase
SpaceX Starbase, also known as Boca Chica spaceport, is SpaceX's Starship launch, test, and manufacturing complex at Boca Chica, Texas, incorporated as a city in May 2025.
SpaceX Starbase, Louisiana
SpaceX Starbase, Louisiana, is a planned commercial spaceport announced in 2026 on 125,000 acres of Pecan Island in Vermilion Parish, backed by a $100 billion investment.
SpaceX Starfall
SpaceX Starfall, also called Project Starfall, is SpaceX's uncrewed, mass-producible reentry capsule for carrying payloads to orbit and returning them to Earth, first flown in 2026.
SpaceX Starshield
SpaceX Starshield is SpaceX's government-oriented satellite business built on Starlink technology, offering Earth observation, communications, and hosted payloads, including a classified reconnaissance constellation for the National Reconnaissance Office.