Imagine the Universe!
Imagine Home  |   Ask an Astrophysicist  |  
Ask an Astrophysicist

The Question

(Submitted February 12, 1999)

Can two areas of the Universe be so far away from each other that the light from area A can not reach area B?

The Answer

It is now believed that the Universe is large enough that there can be areas A and B that have not been able to exchange light.

This is a result of recent observations that indicate that the rate of the Universe's expansion is speeding up, contrary to what astronomers were expecting a couple of years ago.

David Palmer and Samar Safi-Harb
for Ask an Astrophysicist

Previous question
Prev
Main topic
Main
Next question
Next

If words seem to be missing from the articles, please read this.

Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Barbara Mattson
Curator: J.D. Myers
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2014.
This page last updated: Thursday, 01-Dec-2005 13:58:39 EST