I've been modeling planet and asteroid orbits using excel.

When I graph the x and y coordinates, Excel will resize the x and y axi
to fit the size graph I've dragged. Invariably circular orbits will be
displayed as ellipses and displayed ellipses will be thinner or fatter
than actual.

Is there a way to make graphs use the same units for the x and y axises
(or is plural axi?)?

Thanks in advance.

--
Hop David
http://clowder.net/hop/index.html