What is dark energy? What is a black hole? What is the Big Bang? What is a galaxy? How many galaxies are in the universe?
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1. What is the search for extraterrestrial life? 2. What is the significance of the James Webb Space Telescope? 3. What is a wormhole? 4. What is the Fermi Paradox? 5. What is the future of space exploration?
1. What is space? 2. What is the universe? 3. How big is the universe? 4. What is a light-year? 5. What is dark matter?