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100

A person who travels into outer space. 

Astronaut  

100

How many planets in our solar system. 

100

Earth orbits around which heavenly body. 

Sun 

100

An object shaped like a ball. 

Sphere 

100

A force that pulls things toward one another. 

Gravity 

200

To go back and forth from one place to another. 

Shuttle 

200

An organization in the United States that directs space travel and research. 

NASA

200

To send a rocket into outer space. 

Launch 

200

A natural or man-made object that orbits a planet or smaller object. 

Satellite 

200

The stuff everything in the universe is made of; anything that takes up space. 

Matter

300

A suggested explanation of why something happens. 

Theory 

300

An imaginary straight line through the middle of an object, around which the object spins. 

Axis 

300

The sun, other bodies like asteroids and meteors and the planets that orbit the sun. 

Solar System 

300

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 

300

Curved path something in space takes around another object in space. 

Orbit

400

An invisible, protective blanket of air around Earth and other heavenly bodies 

Atmosphere 

400

When the Earth, the moon, and the sun all move together in a direct line. 

Eclipse

400

The most famous comet visible from Earth with the naked eye every 76 years. 

Halley's Comet

400

Name the two closest galaxies to our solar system. 

Milky Way & Andromeda 

400

Other name for the Big Dipper. 

Ursa Major

500

First rocket ship sent to the moon. 

Apollo 11 

500

First African American woman in space. 

Mae Jemison 

500

Scientists who use math to study the universe. 

Astrophysicists 

500

An area between Mars and Jupiter where thousands of asteroids orbit around the sun. 

Asteroid belt 

500

Field of study in which scientists use their knowledge of chemistry and how things in the natural world are made and interact. 

Chemical engineering 

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