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