* The Big Bang was the beginning of the universe: It was not an event within the existing universe, but the event that created the universe itself.

* Asteroids are objects within the universe: They are rocky bodies that orbit stars.

* The Big Bang was a rapid expansion: The universe started as an incredibly hot and dense point and expanded rapidly, creating space, time, and matter.

* The Big Bang theory is supported by evidence: Observations like the cosmic microwave background radiation and the redshift of distant galaxies support the Big Bang theory.

In short, the Big Bang is the origin of the universe, while asteroids are objects within the universe. They are not related.