Answer:
All exiting matter and space considered as a whole the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies , it has been expanding since it's creation in the Big Bang about 13 billion years ago.
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Answer:
All exiting matter and space considered as a whole the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies , it has been expanding since it's creation in the Big Bang about 13 billion years ago.
in
Please mark my answer brainlist.