Home > Astronomy > Scale of Earth, Sun, Galaxy, and Universe

How did the universe begin?

Answer 1

The Big Bang

The big bang theory is the most likely explanation for how the universe came into being. It states that all matter was first collected in a singularity, which later "exploded" (perhaps a more accurate word would be "expanded"), creating particles like atoms that spread out and collected to form larger structures like stars and planets, ultimately creating the universe as we know it.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Layla Anderson

The Big Bang theory is the most widely accepted explanation for how the universe came to be. It states that some 13.8 billion years ago, the universe was a singularity, a point of infinite temperature and density. This singularity quickly expanded and cooled, giving rise to the universe's current state of expansion and the formation of matter and energy as we know it.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.