This is my home page.

Web pages often look better when your video
display is set to 24-bit or 32-bit color.   More info

  Help save the Hubble Space Telescope
There are two petitions at this link: One for USA residents and
one for the rest of the world.  Please consider adding your name.
You can help!   -- Jeff, in Minneapolis

Earth and Moon to Scale
The Sun and Planets to Scale
Our Solar System to Scale
Stereo Images of Jupiter and Saturn
Two Times Two Times...
An Elliptical Puzzle
Orbital Speed

FreeMars.org   Home page of the Minnesota Space Frontier Society,
which hosts my Space and Science Pages.

E-mail me: Jeff Root