What did Galileo's telescope allow him to discover?

• Four moons of Jupiter

• Rings of Saturn

• Milky Way's spiral structure

• Mars' polar ice caps

Where are some of the most powerful telescopes on Earth located?

• On top of mountains

• In city centers

• Underwater

• In deserts

What is the Hubble Telescope known for?

• Orbiting Earth and sending back photos

• Being the first telescope ever made

• Observing the surface of Mars

• Studying Earth's weather patterns

Why did NASA initially send apes into space?

• To study the effects of space travel on primates

• Because apes are easier to train than humans

• To test the durability of space suits

• To observe apes' behavior in zero gravity

What was the name of the rocket ship that first landed on the moon?

• Apollo 11

• Gemini 5

• Voyager 1

• Challenger

Read the question carefully. Use text evidence on page 57 to answer this 2 part question.

Why is gravity a challenge for rockets ships trying to get to space and how do they solve this challenge?