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5. What is the name of the scientific theory that stated that the universe started in an explosion and is getting bigger?
5. What is the name of the scientific theory that stated that the universe started in an explosion and is getting bigger?
6. The expansion of the universe is accelerating or decelerating?
5. What is the name of the scientific theory that stated that the universe started in an explosion and is getting bigger?
6. The expansion of the universe is accelerating or decelerating?
7. How old is the universe?
9. What amazing event will happen to our Milky Way in 3 billion years?