Auroras...

[ElPelado]

Does any body know if the are also auroras in Mars and or Venus??

[julesstoop]

As far as I know both planets have a much less powerfull magnetic field than Earth, so solar wind particals wont be channelled to the poles as much. Thusly resulting in a lower concentration of ionized atmospheric molecules and much less prominent auroral effects.

Besides that. Venus' lower atmosphere might be much to cloudy to let the faint auroral light through to an observer from the surface. On the otger hand the atmosphere of Mars might simply not contain enough ionisable particles per cube unit to deliver visible auroras.

So my guess is: no.

[Matt McIrvin]

There are definitely powerful auroras on Jupiter.

[julesstoop]

The plumes of Io's vulcans will most probably be ionised as well.