Grade 3 Comprehensions with Answers
In our universe there are over fifty billion galaxies that we know of. Our galaxy is called the Milky Way. The Milky Way includes all of our planets, stars, sun and other things like space dust.
Galaxies may contain black holes. Black holes are areas of space where matter has compressed so much, it collapsed in on itself. That means there is a massive amount of matter in a very tiny area. The gravitational pull is so strong that……….
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