When we gaze at the night sky do you believe that you are looking at the universe as it exists? Are we seeing that moment in time or are we seeing into the future, or are we seeing time in the past?
Actually, many of the photons that you are seeing have traveled for billions of years to get here and the stars that produce that light have already left for other destinations.
Because of this phenomenon… the vast distances between us and the stars and the changing configuration of the universe… it is difficult for us to know exactly the true nature of the celestial world.
The one thing that has been figured out is that the universe is 13.7 billion years and and is continually expanding.
If you want to learn more about our universe, look at Universe Today.