The universe is everything that exists physically, the entirety of space and time, all forms of matter, energy, and momentum, and the physical laws and constants that govern them. The age of the universe is believed to be approximately 13.7 billion years, and scientists estimate that the diameter of the observable universe is at least 93 billion light years.
The Earth is part of the solar system. The solar system exists in the Milky Way galaxy. The sun is one of the stars in the…..
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