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