As far as we know, the only planet that human beings have walked on is the planet Earth; we have also walked on the moon, but that is a satellite, not a planet.
You can walk on any of the inner planets. The outer planets (Jupiter, Saturn, Uranus, Neptune) you cannot walk on; they are made entirely of gas. This is only a guess, but Pluto is probably solid enough to walk on.
Jupiter mars mercury have been walked on by me coz im the best at every thing
Dwarf Planets.
well the gasses in planets are hydrogen,methane and helium
The four inner planets are also known as the terrestrial planets (or the `rocky` planets). These are; Mercury, Venus, Earth and Mars.
it is still unknown to man kind if their are other living things on other planets. some people believe there is and some don"t. if the government knows about other life on planets their hiding it
Small planets with no weather.
SPIRAL
People have only walked on Earth.
Saturn, Jupiter, Uranus, and Neptune are the outer planets and are also gas giant planets.
They are rocky planets.
No known planets have aliens.