By Robert Roy Britt
Senior Science Writer
Updated: 11:46 a.m. ET May 24, 2004
If you've ever wondered how big the universe is, you're not alone. Astronomers have long pondered this, too, and they've had a hard time figuring it out. Now an estimate has been made, and it’s a whopper.
The universe is at least 156 billion light-years wide.
In the new study, researchers examined primordial radiation imprinted on the cosmos. Among their conclusions is that it is less likely that there is some crazy cosmic "hall of mirrors" that would cause one object to be visible in two locations. And they've ruled out the idea that we could peer deep into space and time and see our own planet in its youth.
First, let's see why the size is a number you've never heard of before.
Stretching reality
The universe is about 13.7 billion years old. Light reaching us from the earliest known galaxies has been travelling, therefore, for more than 13 billion years. So one might assume that the radius of the universe is 13.7 billion light-years and that the whole shebang is double that, or 27.4 billion light-years wide.
http://msnbc.msn.com/id/5051818/Stretching reality: I wonder if the inability to rationalize concepts as above leads some people to religion?