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NASA's MESSENGER spacecraft becomes the first to orbit Mercury.

Launch of the Hubble Space Telescope.

The Galileo spacecraft arrives at Jupiter, later dropping a probe into its atmosphere.

Yuri Gagarin becomes the first human in space aboard Vostok 1.

The near Shoemaker lands on the asteroid 433 Eros, first landing on an asteroid.

Junon orbital insertion around Jupiter to study its atmosphere and magnetosphere.

Mariner 2 flies by Venus, becoming the first successful interplanetary mission.

Viking 1 and Viking 2 land on Mars, the first U.S. mission to land successfully on Mars.

Launch of the Parker Solar Probe, studying the Sun's outer corona.

Cassini's 'Grand Finale' as it ends its mission by plunging into Saturn.

Launch of Sputnik 1, the first artificial satellite.

Voyager 1 and 2 were launched to study the outer Solar System.

Artemis 1 mission launched, a test flight for NASA's Artemis program.

NASA's Perseverance rover and China's Tianwen-1 mission launch to Mars.

James Webb Space Telescope (JWST) is launched to study the universe in infrared.

The Mir Space Station is launched by the Soviet Union.

Voyager 2 makes a flyby of Neptune, completing the 'Grand Tour' of the outer planets.

Launch of New Horizons to study Pluto and the Kuiper Belt.

China's Chang'e 3 mission lands the Yutu rover on the Moon.

European Space Agency's Rosetta becomes the first mission to orbit and then land a module on a comet.

NASA's InSight lander detects a 'marsquake' for the first time.

First space station, Salyut 1, was launched by the Soviet Union.

First Space Shuttle mission, STS-1, with Columbia.

Apollo 17, the last Apollo moon mission, occurs.

Apollo 11 mission, Neil Armstrong and Buzz Aldrin walk on the Moon.

International Space Station (ISS) construction begins.

Spirit and Opportunity rovers land on Mars.

Curiosity rover landed on Mars as part of the Mars Science Laboratory mission.

First detection of gravitational waves, confirming a prediction of Albert Einstein's theory of general relativity.