Lookback Time Simulator

Shows how the finite speed of light and the great distances to most astronomical objects cause us to observe things as they were in the past.

Running this animation on your computer...

1. right-click to download lookbacktimesim.swf and lookbacktimesim.html to the same directory
2. open the html file in a browser to run the animation

Linking to this animation...

1. copy and paste the code below into your webpage or blog:
   Text Link HTML:

   - or -   

   Image Link HTML:

Putting this animation on your website...

1. upload lookbacktimesim.swf to the same directory as your webpage
2. copy and paste the following code into your webpage:
   Embed HTML: