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Oak National Academy
12 questions
How do planets differ from a star?
What is a comet?
How can we reduce the amount that stars twinkle when we observe them?
Approximately how many stars are there in the Milky Way galaxy?
The speed at which a galaxy is moving away from us can be calculated from its ___.
What absorbs particular frequencies of light to create absorption lines in light from a distant star?
Messier objects were first seen in the 17th century, using newly invented telescopes. In what ways is a **Messier object** different to a star?
What is used to measure the distance to a distant galaxy?
What is the relationship between the movement of galaxies and their distance from us?
According to the **Big Bang Theory**, where was all matter about 13.7 billion years ago?
What best describes the Big Bang?
Spiral galaxies are spinning faster and the universe is expanding more quickly than our current understanding has predicted. What ideas might explain what is going on and improve our understanding?
