1. The tallest mountain in the Solar System is the mighty Olympus Mons on Mars. 

2. If you tried to stand out on the surface of Mars without a spacesuit, you would die almost immediately. The freezing cold temperatures would be a problem, but even worse is the thin atmosphere.

3. The atmosphere on Mars consists of 95% carbon dioxide, 3% nitrogen, 1.6% argon and trace amounts of water and oxygen.

4. Normally the temperature on this planet remains between -140° C to 20° C.

5. The gravity on Mars is 38% of that found on Earth. So a 100 pounds person on Earth would weigh 38 pounds on Mars.