What is this?
It's a comet.
What is this?
It's the atmosphere.
Collection of planets, moons, and other things that orbit around the sun
The solar system
Cylindrical machine that goes into space by fire and gas
a rocket
Fill in the blank: ________ orbit the Sun.
planets
Person who goes into space
astronaut
To argue or discuss about a topic, usually in public or formal events
debate
