


What is the sunspot cycle?
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chòm sao bắc đẩu
- What are some of the largest telescopes in operation or under construction? What is the purpose of space telescopes like the Hubble Space Telescope and the James Webb Space Telescope?
- What are gravitational waves?
- Can you name the constellations that border Ursa Major? What is the radiant of the Ursid meteor shower?
- What is the relationship between solar activity and Earth's climate?
- How far away is the Virgo Cluster?
- Why does Polaris appear relatively stationary? What is the relationship between the Earth's axis of rotation and Polaris's apparent position?
- How does light pollution affect the visibility of constellations and other celestial objects?
- How do astronomers measure distances to nearby stars?
- What are some of the technologies needed for interstellar travel?
- Is the Big Dipper a constellation itself? What part of Ursa Major forms the Big Dipper?
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