What was discovered in 1965 and is believed to be leftover thermal energy from the big bang?
What is the correct order of star colors from hottest to coolest?
Which planet is small, with a rocky surface and an atmosphere?
Which remains the same as the distance of an object from Earth changes?
What force acts between Earth and the moon?
In which direction does Earth rotate?
Which term defines a star system with two stars?
Which is a factor that keeps Earth in orbit around the Sun?
Which is one physical property that all stars have?
Which causes objects in the universe to resist a change in speed or direction?
Observable matter makes up about what percentage of the universe?
If astronomers discovered a new inner planet in the solar system, which characteristic would it most likely have?
Why did scientists struggle for thousands of years to accurately describe the solar system?
What term describes the moon’s path around Earth?
Solar winds have an influence all the way to about 160 AU from the Sun. About how many kilometers is that?
Which is the final event that occurs when a star is forming?
Which quantity does a light-year measure?
The sudden eruptions of energy from a small area of the Sun’s surface are known as
Which is a type of star system?
What occurs when Earth’s shadow covers the moon?
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