AVTC2-Reading 1-Unit 8

Earth is the only planet we know of that is ______  for human beings.

• suitable

• nearest

No one is sure if there is ______  in other parts of our solar system

• life

• discovered

The _____ planets to Earth are Mars, Venus, and Mercury.

• nearest

• suitable

Astronomers were _______ when they saw pictures from the telescope

• excited

• distance

In the future, scientists might ______  other planets and alien worlds.

• single

• discover

Jupiter and Saturn are the two largest ______ in our solar system.

• stars

• planets

In July 2015, a NASA spacecraft ________ Pluto for the first time.

• excited

• reached

Scientists believe there are more than 100 billion ________  in our galaxy.

• life

• stars

The ______  from Earth to the moon is only about 238,900 miles.

• distance

• reach

Earth only has a ______  moon, but Jupiter has almost seventy

• planet

• single