What are Kepler's laws of planetary motion? How does gravitational lensing affect the apparent positions of distant stars and galaxies?
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- What are rogue planets?
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- What is the cosmic microwave background radiation and what does it tell us about the early universe? What are the anisotropies in the cosmic microwave background?
- What is the orbital period of the Earth around the Sun?
- How can we observe the effects of Earth's rotation? How does the barycenter of the solar system move?
- How are heavy elements formed in stars and supernovae? What is nucleosynthesis?
- How do the constellations appear to move across the night sky? How does proper motion contribute to changes in constellations over long timescales?
- What is Einstein's theory of general relativity? How does general relativity explain gravity?
- What are astronomical telescopes used for?
- How do Kepler's laws relate to Newton's laws? How are star trails formed in long-exposure photographs?
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