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Liquid oxygen
Liquid oxygen (LOX) is a cryogenic fluid used medically, industrially, and as a rocket oxidizer. It is produced by cooling and separating oxygen from nitrogen in air.
Liquid-propellant rocket
A liquid-propellant rocket, also called a liquid-fueled rocket, carries its fuel and oxidizer as liquids in separate tanks and burns them for thrust; Robert Goddard first flew one in 1926.
Lisa Nowak
Lisa Nowak, née Caputo, is an American former naval flight officer and NASA astronaut who flew STS-121 in 2006 and was the first astronaut dismissed by NASA, in 2007.
LISA Pathfinder
LISA Pathfinder was a European Space Agency technology-demonstration spacecraft that flew from December 2015 to June 2017, proving drag-free flight and picometre laser metrology for the LISA gravitational-wave observatory.
Lissajous orbit
A Lissajous orbit is a quasi-periodic, three-dimensional spacecraft path around the L1, L2, or L3 Lagrange point, tracing a Lissajous curve that never closes on itself.
List of Amazon Leo launches
The list of Amazon Leo launches covers Amazon's Project Kuiper satellite missions, from a two-satellite prototype flight in October 2023 to 14 production launches carrying 396 satellites through July 2026.
List of Apollo astronauts
The list of Apollo astronauts covers the NASA crews of Project Apollo's crewed missions from 1968 to 1972: 24 astronauts reached the Moon and 12 walked on it.
List of Apollo missions
The list of Apollo missions covers NASA's Moon program flights from 1966 to 1972, including Apollo 11's first landing in 1969, six landings, and the Apollo 13 failure.
List of Artemis astronauts
The list of Artemis astronauts covers the crews named for NASA's Artemis missions to the Moon, beginning with the four astronauts of Artemis II in 2026.
List of artificial objects in heliocentric orbit
The list of artificial objects in heliocentric orbit covers spacecraft, rocket stages, and debris that escaped Earth and circle the Sun, beginning with Pioneer 5 in 1960.
List of artificial objects on the Moon
The list of artificial objects on the Moon catalogs human-made landers, rocket stages, and debris that reached the lunar surface, beginning with Luna 2 in 1959.
List of astronauts by name
The list of astronauts by name covers everyone trained and launched as spacecraft crew, from Yuri Gagarin's 1961 flight to NASA's tally of 721 people, called cosmonauts in Russia and taikonauts in China.
List of astronauts by year of selection
The list of astronauts by year of selection covers NASA's astronaut classes since 1959, from the Mercury Seven to 2025, totaling 370 candidates, plus ESA and other agency selections.
List of cosmonauts
The list of cosmonauts covers people trained by the Soviet and Russian space programs since 1960, including Yuri Gagarin, Valentina Tereshkova, and record holders like Valeri Polyakov.
List of crewed spacecraft
The list of crewed spacecraft covers vehicles built to carry humans to space since Yuri Gagarin's 1961 flight aboard Vostok 1, from Vostok and Mercury to Crew Dragon and Orion.
List of Falcon 9 and Falcon Heavy launches
The list of Falcon 9 and Falcon Heavy launches records every orbital mission flown by SpaceX's two Falcon-family rockets, beginning with Falcon 9's first flight in 2010.
List of Falcon 9 and Falcon Heavy launches (2010–2019)
The list of Falcon 9 and Falcon Heavy launches (2010–2019) covers roughly 88 SpaceX flights beginning with the first Falcon 9 launch on June 4, 2010.
List of Falcon 9 and Falcon Heavy launches (2023)
The list of Falcon 9 and Falcon Heavy launches (2023) covers SpaceX's record 96 successful orbital missions in 2023, 91 by Falcon 9 and 5 by Falcon Heavy.
List of Falcon 9 first-stage boosters
The list of Falcon 9 first-stage boosters catalogs SpaceX's reusable Falcon 9 lower stages, whose landings began in December 2015 and now exceed 600, led by B1067 with 37 flights.
List of fictional spacecraft
A list of fictional spacecraft, or fictional starships, is a catalog of named imagined space vehicles from published works of fiction, central to science fiction.
List of government space agencies
A government space agency is a public organization charged with a country's civil space activities; this list covers major agencies including NASA, ESA, ISRO, JAXA, CNSA, and Roscosmos.
List of GPS satellites
The list of GPS satellites, also known as the list of GPS satellite launches, covers the US Navstar constellation, which has flown 31 operational satellites since 1978.
List of human spaceflights
A chronological list of human spaceflights since Yuri Gagarin first reached orbit aboard Vostok 1 in 1961, covering programs from Mercury and Apollo to commercial flights.
List of Indian satellites
The list of Indian satellites covers spacecraft built or operated by ISRO and its commercial arms since Aryabhata, India's first satellite, launched in 1975.
List of International Space Station expeditions
The list of International Space Station expeditions covers the numbered resident crews that have occupied the ISS continuously since Expedition 1 arrived on November 2, 2000.
List of Long March launches
The list of Long March launches covers China's Long March rocket missions since 1970, when the first launch placed China's Dongfanghong-1 satellite into orbit, with more than 670 launches recorded.
List of Mars orbiters
The list of Mars orbiters covers spacecraft placed in orbit around Mars to map the planet and relay communications, from Mariner 9's arrival in 1971 to five active orbiters in 2026.
List of missions to Mars
The list of missions to Mars covers the more than 40 spacecraft sent since 1960 by six space agencies to fly by, orbit, land on, or sample Mars.
List of missions to the Moon
The list of missions to the Moon covers crewed and robotic lunar flights since 1958, from the Soviet Luna firsts and six Apollo landings to today's commercial landers.
List of missions to Venus
The list of missions to Venus covers every spacecraft sent to Venus since 1961, from Mariner 2's first flyby in 1962 to Venera 13's record 127 minutes on the surface.