Mars(:

1. The primary gas in the Jovian atmospheres is Hydrogen.

2. The primary gas in Mars and Venus is Carbon Dioxide.

3. If I could visit any other planet, I would visit Mars. Mars may conatain water if we find it somewhere, because there are traces of it in the atmosphere. The atmosphere is much different than Earth's, with Carbon Dioxide being the biggest atmosphereic gas. It may not be good for me to go to a planet that doesn't have Oxygen, but if I could go it would be pretty cool. I'd like to go to see if I can find Martians.