The Big Bang theory says that the universe started out as a tiny point of concentrated energy about 13.5 billion years ago. The energy expanded and the universe has been expanding from this point ever since. Astronomers use telescopes to look at distant galaxies and the spectra of light from stars to look for evidence for the Big Bang theory. Astronomers have observed that almost all of the galaxies are moving away from each other.
Almost all scientists say that the Big Bang theory is the correct theory about the beginning of the universe, but some people do not accept that this happened.
Which of the following statements support the Big Bang theory?
(You may need to research some of these)
The universe began as an expansion from a single point and has been expanding ever since.