What is extraterrestrial? (adjective)
Existing outside the Earth.
What is an atmosphere? (noun)
The blanket of gases which surrounds a planet.
What is a galaxy? (noun)
A collection of stars and solar systems held together by gravity.
What is the Milky Way? (noun)
It is the galaxy that contains our Solar System.
What is a journey? (noun)
Traveling from one place to another, usually taking a long time.
What is a planet? (noun)
A body that moves around the sun.
What is data? (noun)
Facts, statistics, or information.
What is space? (noun)
The place outside the atmosphere of the Earth.
What is a comet? (noun)
A body of gas, ice and rock that orbits the sun.
What is a solar system? (noun)
The sun together with all the planets and other bodies that revolve around it.
What is an orbit? (verb)
An orbit is a regular, repeating path that one object in space takes around another.
What is debate? (verb)
To have a discussion or argument about something.
What is a universe? (noun)
All of space and time. Everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, light, and time.