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Space and astronomy vocabulary

This list collects vocabulary for talking and writing about space, the solar system, and astronomy, from planets and orbits to rockets and the space race. It suits students working on a space unit, kids who dream of becoming astronauts, and anyone building a word bank for stories or reports about the universe.

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Space and astronomy vocabulary

33 words
WordMeaningIn a sentenceSave
astronautnounA person who is trained to travel and work in a spacecraft.The astronaut spent six months conducting experiments aboard the space station.
astronomynounThe scientific study of stars, planets, and other objects in outer space.She majored in astronomy because she was fascinated by distant galaxies.
asteroidnounA small, rocky body that orbits the sun, smaller than a planet.Scientists tracked an asteroid passing safely between Earth and the moon last week.
atmospherenounThe mixture of gases surrounding a planet, or the overall mood or feeling of a place.Earth's atmosphere protects us from harmful radiation from the sun.
cometnounA celestial body of ice and dust that orbits the sun and develops a glowing tail when near it.Astronomers tracked the comet for months before it became visible to the naked eye.
constellationnounA group of stars that forms a recognizable pattern and is traditionally named after a figure or object.On a clear night, you can easily spot the constellation known as the Big Dipper.
cosmonautnounAn astronaut trained by the Russian or former Soviet space program.The cosmonaut spent six months aboard the space station conducting experiments.
cosmosnounThe universe considered as an ordered, harmonious system.Ancient philosophers marveled at the vastness and order of the cosmos.
craternounA large bowl-shaped depression in the ground, often caused by a volcanic eruption, explosion, or impact.The meteorite left a massive crater in the desert thousands of years ago.
eclipsenounAn event in which one celestial body blocks the light from another, as seen from a certain viewpoint.Crowds gathered in the park to watch the total solar eclipse through protective glasses.
galaxynounA huge system of stars, gas, and dust held together by gravity.Our solar system is located within the vast Milky Way galaxy.
gravitynounThe attraction between objects that have mass.Gravity pulls the falling apple toward Earth.
launchverbTo start or introduce something new, such as a product, project, or organization.The company will launch its latest smartphone at a press event next month.
lunaradjectiveRelating to the moon or measured by its cycles.The lunar calendar determines the date of several traditional holidays.
meteornounA piece of rock or debris that burns brightly as it enters Earth's atmosphere.They stayed up late watching meteors streak across the night sky.
meteoritenounA piece of rock or metal from space that survives its fall through the atmosphere and lands on Earth.Scientists carefully examined the meteorite that had struck the field last spring.
mission controlnounThe facility and team that direct, monitor, and communicate with a spacecraft during a mission.Mission control confirmed the spacecraft had safely entered orbit around the moon.
moonwalknounA dance move in which a performer appears to glide forward while actually moving backward.The crowd cheered as the dancer performed a smooth moonwalk across the stage.
nebulanounA huge cloud of gas and dust in outer space, often visible as a hazy, glowing patch among the stars.The telescope captured stunning images of a nebula thousands of light-years away.
orbitnounThe curved path that an object in space follows around a star, planet, or other larger body.The satellite completes one orbit of Earth roughly every ninety minutes.
planetnounA large celestial body that orbits a star and does not produce its own light.Earth is the third planet from the sun in our solar system.
probeverbTo investigate or examine something thoroughly and carefully, often to uncover hidden information.Detectives probed the company's financial records for evidence of fraud.
rocketnounA vehicle or device propelled by burning fuel that shoots out at high speed, used to launch spacecraft or weapons.The rocket lifted off the launch pad in a cloud of smoke and flame.
rovernounA vehicle designed to travel over rough or unfamiliar terrain, especially one used to explore another planet.The Mars rover sent back detailed images of the planet's rocky surface.
satellitenounAn object, natural or artificial, that orbits a planet or other larger body in space.The satellite transmits weather data back to stations on Earth.
solar systemnounThe sun together with the planets, moons, and other bodies that orbit it.Students built a model of the solar system for their science project.
spacecraftnounA vehicle designed to travel and operate beyond Earth's atmosphere.The spacecraft entered orbit around Mars after a seven-month journey.
space racenounThe 20th-century competition between the United States and the Soviet Union to achieve superior spaceflight capability.The space race led to the first human landing on the Moon in 1969.
space stationnounA large spacecraft that orbits Earth and allows astronauts to live and work there for extended periods.Astronauts conducted experiments aboard the space station for six months.
spacewalknounA period of activity by an astronaut outside a spacecraft while in space.The crew completed a six-hour spacewalk to repair the solar panels.
supernovanounA massive explosion that occurs when a dying star collapses and violently blows apart, briefly outshining a whole galaxy.Astronomers spotted a supernova in a distant galaxy through the telescope.
telescopenounAn optical instrument that uses lenses or mirrors to make distant objects, especially in space, appear closer and larger.Through the telescope, we could clearly see the rings of Saturn.
universenounAll of space and everything that exists within it, including planets, stars, and galaxies.Astronomers now estimate that the universe contains billions of separate galaxies.

Words for space travel

Space travel has its own vocabulary, from the launch that sends a rocket off the ground to the orbit it settles into once it reaches space. Astronauts and cosmonauts train for missions run by mission control, and some travel far enough to attempt a spacewalk outside their spacecraft. Words like space-race and space-station describe both the history and the ongoing reality of human spaceflight.

Words for what is out there

Beyond Earth, the vocabulary shifts to describing the universe itself. A galaxy is a huge collection of stars, while a nebula is a cloud of gas and dust where new stars can form. Asteroids, comets, and meteors are smaller objects moving through space, and a supernova marks the dramatic end of a massive star's life.

Frequently asked questions

What are good vocabulary words for the solar system?

Words like planet, orbit, moon, asteroid, and solar-system itself are useful starting points for describing our cosmic neighborhood.

What is space race vocabulary?

Space race vocabulary includes words like launch, satellite, astronaut, cosmonaut, and mission-control, tied to the historic competition to reach space.