Imagine the Universe!

Movie (1.5 MB)


This animation shows the expansion history of the Universe. The Big Bang (a large explosion) is immediately followed by rapid expansion of the Universe (matter separating and spreading out quickly). This expansion then slows down because of the gravitational attraction of the matter in the Universe. The expansion speeds up again because of the effect of dark energy.

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
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

DVD Table of Contents
Educator's Index