Animals or plants that might live on other planets are called __________________.
alien life
astronomers
astronauts
Some people believe that there might be alien life on __________________.
Mars
Earth
gravity
Last year, I got a __________________ as a birthday present. Now I look at the stars every night.
telescope
planet
rocket
Our __________________ has eight planets.
spaceship
rocket
solar system
I don’t live on the moon. I live on ________________.
Earth
Venus
Mars
__________________ makes things fall down.
world
alien life
gravity
When I was a kid, I wanted to be an __________________ and travel in space.
spaceship
astronaut
rocket
The __________________ from the Earth to the sun is about 150 kilometers
distance
alien life
world
Galileo Galilei was a famous _________________ who used a telescope to study the night sky 400 years ago.
world
solar system
astronomer
Astronomers have discovered hundreds of other _________________ that orbit (travel around) other suns.
planets
stars
rockets
The planet Neptune was _______________ in 1846. People didn’t know it existed before that time.
invented
explored
discovered
Why do people want to __________________ space? Why do they want to find out what is out there?
dance
create
explore
__________________, like the one in the picture, carry astronauts into space.
telescopes
rockets
aliens
Another word for our planet is “__________________”.
place
house
world
Perhaps, humans will travel in __________________ to other solar systems and planets in the future.
spacecars
spaceships
spaceplanes
