How big is the universe?
How big is the universe?
According to the latest findings, the universe came into being about 13.7 billion years ago. In theory, therefore, we cannot receive any radiation more than 13.7 billion years old. Or, to put it another way, no light that reaches us from deep space can have travelled from more than 13.7 billion light-years away. Of course, this. does not mean that the universe comes to an end at this distance. The universe could be very much larger than the area we are able to observe through our telescopes, and it could even extend to infinity.