Unmanned Spacecraft Timeline

The following table is a list of all unmanned spacecraft to explore beyond Earth orbit (along with the first few Soviet and American spacecraft to go into orbit). I have tried to make this list as comprehensive as possible, but undoubtedly I have missed a few. If you are aware of any such omission, feel free to contact me with this information. Many of the spacecraft are hyperlinked to individual pages which go into detail about their missions. Eventually, I intend to have such a page for all of the spacecraft in the list, but that will take some time. In the mean time, I hope you find the information that is here both informative and interesting.

Sputnik 1

(USSR)

Oct. 4, 1957

Satellite

First artificial satellite.

Sputnik 2

(USSR)

Nov. 3, 1957

Satellite

Carried first animal into space.

Explorer 1

(USA)

Jan. 31, 1958

Satellite

First successful U.S. satellite. Also discovered Earth's radiation belt.

Pioneer 0

(USA)

Aug. 17, 1958

Lunar orbiter

First stage exploded.

Pioneer 1

(USA)

Oct. 11, 1958

Lunar orbiter

Failed to reach escape velocity.

Pioneer 3

(USA)

Dec. 6, 1958

Lunar flyby

Failed to reach escape velocity.

Luna 1

(USSR)

Jan. 2, 1959

Lunar flyby

Intended for impact, but missed lunar surface and is now in a solar orbit.

Pioneer 4

(USA)

Mar. 3, 1959

Lunar flyby

Still in a solar orbit.

Luna 2

(USSR)

Sep. 12, 1959

Lunar lander

Impacted Moon on Sep 13, 1959, becoming first man-made object to reach another body in our universe.

Luna 3

(USSR)

Oct. 4, 1959

Lunar flyby

Reached the Moon on Oct. 7 and returned the first photograph of its far side.

Pioneer 5

(USA)

Mar. 11, 1960

Solar monitor

Still in a solar orbit.

Mars 1960A

(USSR)

Oct. 10, 1960

Mars probe

Failed to reach Earth orbit.

Mars 1960B

(USSR)

Oct. 14, 1960

Mars probe

Failed to reach Earth orbit.

Venera 1

(USSR)

Feb. 12, 1961

Venus flyby

Now in a solar orbit.

Ranger 3

(USA)

Jan. 26, 1962

Lunar lander

Missed the Moon and is now in a solar orbit.

Ranger 4

(USA)

Apr. 23, 1962

Lunar lander

First U.S. impact on the Moon.

Mariner 2

(USA)

Aug. 27, 1962

Venus flyby

Arrived at Venus on Dec. 14, 1962 becoming the first successful interplanetary spacecraft. Now in a solar orbit.

Ranger 5

(USA)

Oct. 18, 1962

Lunar flyby

Intended for impact on lunar surface but became a fly-by due to spacecraft failure.

Mars 1962A

(USSR)

Oct. 24, 1962

Mars flyby

Failed to leave Earth orbit.

Mars 1

(USSR)

Nov. 1, 1962

Mars flyby

Communications failed en route.

Mars 1962B

(USSR)

Nov. 4, 1962

Mars lander

Failed to leave Earth orbit.

Luna 4

(USSR)

Apr. 2, 1963

Lunar probe

Missed the Moon and is now in an Earth-Moon orbit.

Ranger 6

(USA)

Jan. 30, 1964

Lunar lander

Impacted lunar surface but returned no photographs due to camera failure.

Zond 1

(USSR)

Apr. 2, 1964

Venus flyby

Communications lost en route.

Ranger 7

(USA)

July 28, 1964

Lunar lander

Returned pictures of lunar surface before impact on July 31, 1964.

Mariner 3

(USA)

Nov. 5, 1964

Mars flyby

Mission failed when solar panels did not open. Now in a solar orbit.

Mariner 4

(USA)

Nov. 28, 1964

Mars flyby

Arrived on Jul. 14, 1965 and returned close-up photos of Martian surface. Now in a solar orbit.

Zond 2

(USSR)

Nov. 30, 1964

Mars flyby

Contact lost en route.

Ranger 8

(USA)

Feb. 17, 1965

Lunar lander

Returned photographs of lunar surface before impact on Feb. 20, 1965.

Ranger 9

(USA)

Mar. 21, 1965

Lunar lander

Returned photographs of lunar surface before impact on Mar. 24, 1965.

Luna 5

(USSR)

May 9, 1965

Lunar lander

Destroyed upon impact with lunar surface.

Luna 6

(USSR)

June 8, 1965

Lunar lander

Missed the Moon and is now in solar orbit.

Zond 3

(USSR)

July 18, 1965

Lunar flyby

Transmitted pictures of the Moon's far side.

Luna 7

(USSR)

Oct. 4, 1965

Lunar lander

Destroyed upon impact with lunar surface.

Venera 2

(USSR)

Nov. 12, 1965

Venus flyby

Communications failed. Now in a solar orbit.

Venera 3

(USSR)

Nov. 16, 1965

Venus probe

Communications failed. Impacted Venus.

Luna 8

(USSR)

Dec. 3, 1965

Lunar lander

Destroyed upon impact with lunar surface.

Pioneer 6

(USA)

Dec. 16, 1965

Solar probe

Still transmitting from a solar orbit.

Luna 9

(USSR)

Jan. 31, 1966

Lunar lander

Performed first successful soft landing on the Moon, on Feb. 3, 1966, and transmitted the first photographs from its surface.

Luna 10

(USSR)

Mar. 31, 1966

Lunar orbiter

Studied Moon's gravity and radiation. Now in a lunar orbit.

Surveyor 1

(USA)

Apr. 30, 1966

Lunar lander

First U.S. soft landing on the Moon.

Lunar Orbiter 1

(USA)

Aug. 10, 1966

Lunar orbiter

Orbited the Moon, returning photographs of its surface before impacting on command.

Pioneer 7

(USA)

Aug. 17, 1966

Solar probe

Still in a solar orbit.

Luna 11

(USSR)

Aug. 24, 1966

Lunar orbiter

Studied Moon's gravity and chemical composition. Now in a lunar orbit.

Surveyor 2

(USA)

Sep. 20, 1966

Lunar lander

Failed and impacted the Moon.

Luna 12

(USSR)

Oct. 22, 1966

Lunar orbiter

Photographed surface of the Moon. Now in a lunar orbit.

Lunar Orbiter 2

(USA)

Nov. 6, 1966

Lunar orbiter

Orbited the Moon, returning photographs of its surface before impacting on command.

Luna 13

(USSR)

Dec. 21, 1966

Lunar lander

Arrived on Dec. 24, 1966 and transmitted panoramic photographs of surface.

Lunar Orbiter 3

(USA)

Feb. 5, 1967

Lunar orbiter

Orbited the Moon, returning photographs of its surface before impacting on command.

Surveyor 3

(USA)

Apr. 17, 1967

Lunar lander

Landed safely on lunar surface.

Lunar Orbiter 4

(USA)

May 4, 1967

Lunar orbiter

Orbited the Moon, returning photographs of its surface before impacting on command.

Venera 4

(USSR)

June 12, 1967

Venus probe

Arrived on Oct. 18, 1967. Returned atmospheric data but was crushed by pressure before reaching surface.

Mariner 5

(USA)

June 14, 1967

Venus flyby

Arrived on Oct. 19, 1967 and studied Venusian magnetic field. Now in a solar orbit.

Surveyor 4

(USA)

July 14, 1967

Lunar lander

Failed and impacted the Moon.

Lunar Orbiter 5

(USA)

Aug. 1, 1967

Lunar orbiter

Orbited the Moon, returning photographs of its surface before impacting on command.

Surveyor 5

(USA)

Sep. 8, 1967

Lunar lander

Landed safely on lunar surface.

Surveyor 6

(USA)

Nov. 7, 1967

Lunar lander

Landed safely on lunar surface and performed brief take-off.

Pioneer 8

(USA)

Dec. 13, 1967

Solar probe

Still transmitting from a solar orbit.

Surveyor 7

(USA)

Jan. 7, 1968

Lunar lander

Landed safely on lunar surface.

Luna 14

(USSR)

Apr. 7, 1968

Lunar probe

Studied Moon's motion and its gravity.

Zond 5

(USSR)

Sep. 14, 1968

Lunar flyby

Flew around the Moon and returned to Earth.

Pioneer 9

(USA)

Nov. 8, 1968

Solar probe

Still in a solar orbit.

Zond 6

(USSR)

Nov. 10, 1968

Lunar flyby

Flew around the Moon and returned to Earth.

Venera 5

(USSR)

Jan. 5, 1969

Venus probe

Arrived on May 17, 1969. Collected data on atmospheric composition before being crushed by pressure.

Venera 6

(USSR)

Jan. 10, 1969

Venus probe

Arrived on May 16, 1969. Collected data on atmospheric composition before being crushed by pressure.

Mariner 6

(USA)

Feb. 24, 1969

Mars flyby

Arrived on May 17, 1969 and flew along Mars equator, returning information on temperature, pressure, and surface composition. Now in a solar orbit.

Mariner 7

(USA)

Mar. 27, 1969

Mars flyby

Arrived on Aug. 5, 1969 and flew near south pole of Mars, returning pictures and measurements of temperature, pressure, and surface composition. Now in a solar orbit.

Luna 15

(USSR)

July 13, 1969

Lunar lander

Destroyed upon impact with lunar surface.

Zond 7

(USSR)

Aug. 8, 1969

Lunar flyby

Flew around the Moon and returned to Earth.

Venera 7

(USSR)

Aug. 17, 1970

Venus lander

First successful landing on another planet on Dec. 15, 1970. Returned 23 minutes of data, including measurement of surface temperature.

Luna 16

(USSR)

Sep. 12, 1970

Lunar lander

Landed on Sep. 20, 1970 and returned lunar soil samples.

Zond 8

(USSR)

Oct. 20, 1970

Lunar flyby

Flew around the Moon and returned to Earth.

Luna 17

(USSR)

Nov. 10, 1970

Lunar lander

Deployed automated rover upon landing on lunar surface, which took pictures and conducted soil analysis.

Mariner 8

(USA)

May 8, 1971

Mars flyby

Spacecraft never reached Earth orbit.

Mars 2

(USSR)

May 19, 1971

Mars orbiter & lander

Lander became first man-made object to reach Mars surface, on Nov. 27, 1971

Mars 3

(USSR)

May 28, 1971

Mars orbiter & lander

Lander completed the first successful landing on Mars, on Dec. 2, 1971, and returned 20 seconds of video data.

Mariner 9

(USA)

May 30, 1971

Mars orbiter

First spacecraft to orbit another planet, and is still revolving around Mars. Also returned first close range photos of moons Phobos and Deimos.

Luna 18

(USSR)

Sep. 2, 1971

Lunar lander

Destroyed upon impact with lunar surface.

Luna 19

(USSR)

Sep. 28, 1971

Lunar orbiter

Still in a lunar orbit.

Luna 20

(USSR)

Feb. 14, 1972

Lunar lander

Soft landed on Feb. 21, 1972, and launched lunar soil samples back to Earth.

Pioneer 10

(USA)

Mar. 3, 1972

Jupiter flyby

Passed Jupiter on Dec. 1, 1973 and has now left the solar system. Returned over 500 images of Jupiter and data on its magnetic field.

Venera 8

(USSR)

Mar. 27, 1972

Venus lander

Arrived on July 22, 1972. Returned information on wind speed variations through atmosphere and 50 minutes of data after landing.

Luna 21

(USSR)

Jan. 8, 1973

Lunar lander

Deployed second automated rover upon landing, which traveled 37 km while exploring the lunar surface.

Pioneer 11

(USA)

Apr. 6, 1973

Jupiter & Saturn flyby

Visited Saturn on gravity assist from Jupiter and has now left the solar system. Returned images of both planets, especially Jupiter's Red Spot and Saturn's Rings.

Mars 4

(USSR)

July 21, 1973

Mars orbiter

Failed to insert itself in Martian orbit.

Mars 5

(USSR)

July 25, 1973

Mars orbiter

Entered orbit on Feb. 12, 1974.

Mars 6

(USSR)

Aug. 5, 1973

Mars orbiter & lander

Entered orbit on Mar. 12, 1974, but lander failed on its way down.

Mars 7

(USSR)

Aug. 9, 1973

Mars orbiter & lander

Orbiter failed and lander missed the planet.

Mariner 10

(USA)

Nov. 3, 1973

Mercury & Venus flyby

First spacecraft to visit Mercury, using a gravity assist from Venus. After producing over 10,000 pictures of the planet's surface it was placed in a solar orbit.

Luna 22

(USSR)

May 29, 1974

Lunar orbiter

Studied Moon and surrounding region from orbit.

Luna 23

(USSR)

Oct. 28, 1974

Lunar probe

Destroyed upon impact with lunar surface.

Helios 1

(USA & W. Germany)

Dec. 10, 1974

Solar probe

Now in a solar orbit.

Venera 9

(USSR)

June 8, 1975

Venus orbiter & lander

Arrived on Oct. 22, 1975. Returned 53 minutes of data, including the first black & white photographs of Venusian surface.

Venera 10

(USSR)

June 14, 1975

Venus orbiter & lander

Arrived on Oct. 25, 1975. Returned 65 minutes of data, including black and white photos of planet surface.

Viking 1

(USA)

Aug. 20, 1975

Mars orbiter & lander

Searched for life on Mars and monitored the planet's weather. Communication with the orbiter was shut down in 1980, after 1489 orbits.

Viking 2

(USA)

Sep. 9, 1975

Mars orbiter & lander

Searched for life on Mars and monitored the planet's weather. The orbiter ran out of power in 1978 and the lander stopped transmitting in 1980.

Helios 2

(USA & W. Germany)

Jan. 16, 1976

Solar probe

Came within 43 million km of the Sun.

Luna 24

(USSR)

Aug. 9, 1976

Lunar lander

Returned lunar soil samples after landing.

Voyager 2

(USA)

Aug. 20, 1977

Multi- planet flyby

Flew by Jupiter in 1979, Saturn in 1981, Uranus in 1986, and Neptune in 1989, studying their satellites, rings, and magnetospheres. Still transmitting from beyond our solar system.

Voyager 1

(USA)

Sep. 5, 1977

Jupiter & Saturn flyby

Flew by Jupiter in 1979 and Saturn in 1980, studying their satellites, rings, and magnetospheres. Still transmitting from beyond our solar system.

Pioneer 12 (Pioneer Venus)

(USA)

May 20, 1978

Venus orbiter

Used radar to map Venutian surface. Shut down in 1992.

Pioneer 13 (Pioneer Venus)

(USA)

Aug. 8, 1978

Venus probe

Arrived on Dec. 9, 1978, deploying four atmospheric probes, which descended by parachute and learned that the lower atmosphere was clear.

Venera 11

(USSR)

Sep. 9, 1978

Venus lander

Arrived on Dec 25, 1978. Returned data for 95 minutes.

Venera 12

(USSR)

Sep. 14, 1978

Venus lander

Arrived on Dec. 21, 1978. Returned data for 110 minutes, including evidence of lightning.

Venera 13

(USSR)

Oct. 30, 1981

Venus lander

Landed on Mar. 1, 1982. Returned first color photographs of planet surface and conducted soil analysis, finding rocks rare on Earth.

Venera 14

(USSR)

Nov. 4, 1981

Venus lander

Arrived on Mar. 5, 1982. Returned panoramic photos and conducted soil analysis.

Venera 15

(USSR)

June 2, 1983

Venus orbiter

Arrived on Oct. 10, 1983. Mapped part of northern hemisphere using radar.

Venera 16

(USSR)

June 7, 1983

Venus orbiter

Arrived on Oct. 14, 1983. Mapped part of northern hemisphere using radar.

Vega 1

(USSR)

Dec. 15, 1984

Venus & Halley flyby

Flew by Venus and dropped lander which failed. Encountered Comet Halley on Mar. 6, 1986. Now in a solar orbit.

Vega 2

(USSR)

Dec. 21, 1984

Venus & Halley probe

Flew by Venus and dropped lander which sampled soil, finding rocks rare on Earth. Encountered Comet Halley on Mar. 9, 1986. Now in a solar orbit.

Sakigake

(Japan)

Jan. 7, 1985

Halley flyby

Encountered Comet Halley on Mar. 1, 1986.

Giotto

(Europe)

July 2, 1985

Comet flyby

Encountered Halley's comet on Mar. 13, 1986 and comet Grigg-Skjellerup on July 10, 1992.

Suisei

(Japan)

Aug. 18, 1985

Halley flyby

Encountered Comet Halley on Mar. 8, 1986.

Phobos 1

(USSR)

July 7, 1988

Phobos orbiter & lander

Intended to study Mars' moon, Phobos, but contact was lost en route.

Phobos 2

(USSR)

July 12, 1988

Phobos orbiter & lander

Inserted into orbit around Mars but lander failed to make it to Phobos.

Magellan

(USA)

May 4, 1989

Venus orbiter

Mapped Venusian surface using radar. Plunged into its atmosphere and was crushed by pressure after four years in orbit.

Galileo

(USA & Europe)

Oct. 18, 1989

Jupiter orbiter & probe

Designed to explore and study Jovian system. Probe entered Jupiter's atmosphere on Dec. 7, 1995 and orbiter is still transmitting data.

Muses-A

(Japan)

Jan. 24, 1990

Lunar orbiters

Consisted of two small orbiters, but failed to send back data from orbit around Moon.

Ulysses

(USA & Europe)

Oct. 6, 1990

Solar flyby

Used gravity assist from Jupiter to achieve polar orbit around the Sun. Viewed Sun from high latitudes and studied its surrounding environment.

Mars Observer

(USA)

Sep. 25, 1992

Mars orbiter

Contact was lost just before it was to be inserted into Mars orbit.

Clementine

(USA)

Jan. 25, 1994

Lunar orbiter

Designed to test new space technology for the Department of Defense. It collected data which should allow scientists to create the first topographic map of the Moon.

Solar and Heliospheric Observatory (SOHO)

(USA and Europe)

December 2, 1995

Solar probe

Designed to investigate (1) the physical processes that form and heat the Sun's corona, maintain it and give rise to the expanding solar wind and (2) the interior structure of the Sun.

Near Earth Asteroid Rendezvous

(USA)

Feb. 17, 1996

Asteroid flyby and orbiter

Arrived at Mathilde for flyby on June 27, 1997. Missed orbit insertion opportunity at Eros on Jan. 10, 1999 due to lost communication prior to critical burn. Orbit was recalculated, and NEAR arrived at Eros for orbit insertion on Feb. 14, 2000 to become the first spacecraft to orbit a small body.

Mars Global Surveyor

(USA)

Nov. 7, 1996

Mars Orbiter

Arrived on Sept. 12, 1997. First spacecraft to use aerobraking to establish its orbit. It accomplished this despite having a damaged solar panel. It is still transmitting data.

Mars 96

(Russia)

Nov. 16, 1996

Mars Orbiter & Lander

Failed.

Mars Pathfinder

(USA)

Dec. 4, 1996

Mars Lander and Rover

Arrived July 4, 1997. First lander to use an airbag landing system, and the first spacecraft to deploy a rover on Mars. Contact lost with lander on Sept. 27, 1997 for unknown reasons.

Cassini

(USA)

Oct. 15, 1997

Saturn Orbiter & Titan Probe

Still en route to Saturn using VVEJGA trajectory.

Advanced Composition Explorer

(USA)

Aug. 25, 1997

Satellite in L1 Halo orbit

The ACE spacecraft is sampling low-energy particles of solar origin and high-energy galactic particles. It also provides near-real-time reports of space weather.

Lunar Prospector

(USA)

Jan. 7, 1998

Lunar orbiter

Discovered strong evidence for water in polar craters.

Deep Space 1

(USA)

Oct. 24, 1998

Asteroid and Comet flyby

Designed to test new space technology for NASA. Arrived at asteroid 9969 Braille (formerly 1992KD) on July 29, 1999, but obtained limitted data due to spacecraft safing. Currently en route to comet Borelly, still operating despite failure of spacecraft's star tracker.

Mars Climate Orbiter

(USA)

Dec. 11, 1998

Mars Orbiter

Spacecraft burned up in Martian atmosphere during orbit insertion due to error caused from confusion about unit system.

Mars Polar Lander/DS2

(USA)

Jan. 3, 1999

Mars lander and subsurface probes

All three craft failed during encounter with Mars for unkown reasons.

Stardust

(USA)

Feb. 7, 1999

Comet flyby and sample return

The primary objective of the Discovery class Stardust mission is to fly by the comet P/Wild 2 and collect samples of dust and volatiles in the coma of the comet. It will then return these samples to Earth for detailed study.


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Unmanned Spacecraft Timeline/UIUC/ sulfridg@uiuc.edu/revised May 00