Animals or plants that might live on other planets are called ____. Some people believe that there might be alien life on____ Last year, I got a ____ as a birthday present. Now I look at the stars every night. Our ____ has eight planets. I don’t live on the moon. I live on ____. ____ makes things fall down. When I was a kid, I wanted to grow up and be an____ and travel in space. The ____ from the Earth to the sun is about 150 kilometers Galileo Galilei was a famous ____ who used a telescope to study the night sky 400 years ago. Astronomers have discovered hundreds of other____s that orbit other suns. The planet Neptune was ____ed in 1846. People didn’t know it existed before that time. Why do people want to ____ space? Why do they want to find out what is out there? ____s, like the one in the picture at the top of this page, carry astronauts into space. Another word for planet is ____. Perhaps, humans will travel in ____s to other solar systems and planets in the future.

Space

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