Is it possible for distant galaxies to be moving away from us faster than the speed of light?
And if it is would it be possible for us to see them?
Surprisingly the answer to both questions is a resounding YES.
How is that possible? How can something travel faster than the speed of light?
Today we will try and paint an accurate picture of the Universe based on the Lambda-Cold-Dark-Matter model, which is the best cosmological model today.
Once we have painted that picture, the answers to our questions will be straightforward.
A year on earth is measured by one complete trip around the sun. Seems simple enough but there is a problem. The earth doesnt travel in a path around the sun that returns it to its starting point. So how do we know when the year starts or ends?
Is it possible for distant galaxies to be moving away from us faster than the speed of light?
And if it is would it be possible for us to see them?
Surprisingly the answer to both questions is a resounding YES.
How is that possible? How can something travel faster than the speed of light?
Today we will try and paint an accurate picture of the Universe based on the Lambda-Cold-Dark-Matter model, which is the best cosmological model today.
Once we have painted that picture, the answers to our questions will be straightforward.
Find out about the Higgs Boson and the mechanism that causes fundamental particles to have mass. If the electron had a different mass, then the orbitals inside atoms would be a different size and the world would be a very different place.