22. Just How Big Is The Universe?
A question as old as the universe itself – how big is the universe, and is there a way to measure it? Astrophysicists have done a brilliant job of being able to measure the observable universe, ie. the spherical region of our universe that can be observed from the Earth.
However, that’s only a small part of the actual universe that’s out there, beyond our horizon. Some MIT physicists have calculated that the actual universe is at least 250 times bigger than the observable universe – that’ at least 7 trillion light-years across.
But then again, this is just an estimate. Since the universe is reportedly expanding faster than the speed of light – and we need light to be able to observe or measure anything – the answer to this question may be hard to come by.