Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Expanding Universe
Name: kris whelan
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: 1993 - 1999

If the universe is expanding, what is it expanding into? In other words, how does one define the universe?

By definition, Universe includes everything therefore there is no question of its expanding into something. An example which is easy to grasp is that of surface of a balloon. If we were two dimensional creatures restricted to surface of a balloon then we will see the "Universe"(balloon) expand. his example does not convey the whole richness of possible universe, as there can be universes which are infinite in spatial extent which can stretch as time goes on. No matter how much stretching the universe goes through, it can not have a size larger than infinite !

If you would like further explanation just drop an e-mail.

Jasjeet ( Jasjeet S Bagla )

Click here to return to the Astronomy Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory
n b