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What is the glow after sunset called?

How did the telescope impact the world?

What element is formed in stars?

Was time or space first?

Which of the following lists the correct order of the life cycle of massive stars?

Did humans exist before the Moon?

What emits a lot of radiation?

What happens to supergiant stars when they run out of fuel?

Why is the sky still bright after sunset?

Did scientists discover a hidden ocean?

Why do astronauts see black sky in space?

What passes through the zodiac?

Is the parallax effect a real thing?

What was the problem with early telescopes?

Why can't a protostar immediately collapse into a star?

What elements are formed during stellar evolution?

What does the zodiac look like in the sky?

What do red giants turn helium into?

How does gravity cause a star to collapse?

What are five uses for a telescope?

What does it mean when clouds get dark?

When did Galileo discover the Moon has craters?

Are stars liquid or gas?

What is the brightest day ever recorded?