Which scientist discovered the shape of the planets' orbits?
When a shooting star appears in the sky, it actually is which of the following?
What does a red shift indicate about a galaxy?
Approximately how long does it take light from the Sun to reach Earth?
Which of the following is a star that expands due to fusion?
Massive stars begin their life cycle as which type of object?
Which galaxy is Earth part of?
Which star system is closest to Earth, after the Sun?
Which of the following has the objects arranged from largest to smallest?
The North Star, ___, is positioned almost directly over the North Pole.
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