Christina Koch, a NASA astronaut, set the record for the longest single spaceflight by a woman.
a NASA astronaut
The Big Dipper, a famous constellation, is part of Ursa Major.
a famous constellation
Curiosity, a NASA rover on Mars, has been exploring the planet since 2012.
a NASA rover on Mars
Michael Collins, the Apollo 11 pilot, stayed in orbit around the Moon.
the Apollo 11 pilot
The Andromeda Galaxy, our nearest large neighbor, is moving closer to the Milky Way.
our nearest large neighbor
Sally Ride, the first American woman in space, flew aboard Challenger in 1983.
the first American woman in space
Apollo 11, the first mission to land humans on the Moon, returned safely to Earth in 1969.
the first mission to land humans on the Moon
Sputnik 1, the first artificial satellite, was launched in 1957.
the first artificial satellite
Yuri Gagarin, the first human in space, orbited Earth in 1961.
the first human in space
SpaceX, a private company founded by Elon Musk, built the reusable Falcon 9 rocket.
a private company founded by Elon Musk
Edwin Hubble, an American astronomer, showed that the universe is expanding.
an American astronomer
Kathryn Sullivan, an American astronaut, became the first woman to walk in space in 1984.
an American astronaut
The Perseverance rover, a NASA mission, landed on Mars in 2021.
a NASA mission
Mars, the fourth planet from the Sun, is known as the Red Planet.
the fourth planet from the Sun
The Milky Way, our home galaxy, contains billions of stars.
our home galaxy
The Sun, a medium-sized star, gives energy to Earth.
a medium-sized star
NASA, the American space agency, was founded in 1958.
the American space agency
Valentina Tereshkova, the first woman in space, orbited Earth in 1963.
the first woman in space
Halley’s Comet, a famous comet, appears about every 76 years.
a famous comet
The Great Red Spot, a giant storm on Jupiter, has lasted for centuries.
a giant storm on Jupiter
Laika, the first dog in space, flew on Sputnik 2 in 1957.
the first dog in space
The Kuiper Belt, a region beyond Neptune, is full of icy bodies.
region beyond Neptune
Saturn, the planet with the largest rings, is the sixth planet from the Sun.
the planet with the largest rings
Europa, one of Jupiter’s moons, may have an ocean under its ice.
one of Jupiter’s moons
Buzz Aldrin, the second man on the Moon, followed Neil Armstrong in 1969.
the second man on the Moon
Hubble, a powerful space telescope, has sent back images of distant galaxies.
a powerful space telescope