before it could have been the size of a pea on your dinner plate, all condensed inside. In about 5 billion years, the sun will explode, taking away, Mercury, Venus, and Earth in the explosion. In about 10 to 100 billion years, the big bang will reverse, returning back to that original size.
The size of the universe at the time of the Big Bang is estimated to have been extremely small, even smaller than a proton. The universe has been expanding ever since the Big Bang occurred approximately 13.8 billion years ago.
The Big Bang.
The event that marks the beginning of the universe is the Big Bang. This was a cosmic event that occurred about 13.8 billion years ago, creating the universe as we know it today. The Big Bang theory is widely accepted by scientists as the most plausible explanation for the origin of the universe.
From an infinitesimally small point to the present size, the universe is still expanding as a result of the big bang.
big bang explosion
Not much, really. Our Universe MIGHT be significantly larger than what we can see -- that portion of our Universe we call the "observable Universe" -- or it might be infinite. No conclusion can be made about the size of our Universe based on the fact of the Big Bang.
The most used expression is big bang.
Some questions about the Big Bang theory and its implications for the origin of the universe include: What caused the Big Bang? How did the universe evolve after the Big Bang? What evidence supports the Big Bang theory? What are the implications of the Big Bang for our understanding of the universe's beginning and future?
In the immediate aftermath of the "Big Bang" there was rapid inflation of the universe. That slowed and the universe is now believed to be still, slowly, expanding.
The big bang began the expansion of spacetime with great rapidity. The Universe began with the Big Bang. In other words both space and time began at the big bang. The big bang started the Universe from the point t=0.
The Big Bang is estimated to have occurred around 13.8 billion years ago, based on scientific measurements and observations of the expansion of the universe.
evidence shows that the big bang when the universe started has occurred around 13.7 billions years ago.