A person who travels into outer space.
Astronaut
How many planets in our solar system.
8
Earth orbits around which heavenly body.
Sun
An object shaped like a ball.
Sphere
A force that pulls things toward one another.
Gravity
To go back and forth from one place to another.
Shuttle
An organization in the United States that directs space travel and research.
NASA
To send a rocket into outer space.
Launch
A natural or man-made object that orbits a planet or smaller object.
Satellite
The stuff everything in the universe is made of; anything that takes up space.
Matter
A suggested explanation of why something happens.
Theory
An imaginary straight line through the middle of an object, around which the object spins.
Axis
The sun, other bodies like asteroids and meteors and the planets that orbit the sun.
Solar System
A very large cluster of billions of stars, dust, and gas held together by gravity and separated from other star systems by a large amount of space.
Galaxy
Curved path something in space takes around another object in space.
Orbit
An invisible, protective blanket of air around Earth and other heavenly bodies
Atmosphere
When the Earth, the moon, and the sun all move together in a direct line.
Eclipse
The most famous comet visible from Earth with the naked eye every 76 years.
Halley's Comet
Name the two closest galaxies to our solar system.
Milky Way & Andromeda
Other name for the Big Dipper.
Ursa Major
First rocket ship sent to the moon.
Apollo 11
First African American woman in space.
Mae Jemison
Scientists who use math to study the universe.
Astrophysicists
An area between Mars and Jupiter where thousands of asteroids orbit around the sun.
Asteroid belt
Field of study in which scientists use their knowledge of chemistry and how things in the natural world are made and interact.
Chemical engineering