What is the Big Bang?
Q: What is the Big Bang?
A: The Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today. It is the most common theory of the universe, from its very early stages to present day.
Q: What are some alternatives to the Big Bang Theory?
A: Alternatives to the Big Bang Theory are called Steady State theory and Plasma cosmology, both of which suggest that there is no beginning or end to the universe.
Q: How did it all start according to this theory?
A: According to this theory, it began as a very hot, small, and dense superforce (the mix of four fundamental forces) with no stars, atoms, form or structure (called a "singularity"). Then about 13.8 billion years ago space expanded quickly leading to formation of atoms which eventually led to formation of stars and galaxies.
Q: Who first noted an expanding universe could be traced back in time?
A: Georges Lemaitre was first one who noted in 1927 that an expanding universe could be traced back in time to an originating single point.
Q: Is the Universe still expanding today?
A: Yes, as a whole, the Universe is still expanding today and getting colder as time passes.
Q: What is Cosmology?
A: Cosmology is the study of how the Universe began and its development over time.
Q: Do scientists agree with this theory so far?
A:Yes, some scientists who study cosmology have agreed that The Big Bang Theory matches what they have observed so far.
