~mountains... well thatz a start... forgot the other 2...
Mercury has the smallest mass of the 8 planets at 5.5% of the mass of the Earth. It therefore has the least gravity of all the planets.
At least 32 have been found on October 19 2009!
murcury,mars,venus,earth,neptune,uranus,saturn,and jupiter
There over at least a billion planets out there orbiting at least a million stars. We do not no any important planets out there right now, at least currently.
They least resemble rocky planets like Venus Earth and Mars, particularly they least resemble planets that we would consider as possible life sustaining planets.
the amount of planets in this life-system has not yet been found but many scientist are still trying to find out do to mars water roots
Mercury has the least variation in surface temperature among the planets in our solar system. This is because it has almost no atmosphere to trap heat, leading to very hot temperatures on the sunny side and very cold temperatures on the dark side.
All of the planets in the Solar System except for Mercury and Venus have at least one moon.
The four Jovian planets
No. Most planets do. Six of the eight planets in our solar system have at least one moon.
The gas planets, in our solar system at least, are Jupiter, Saturn, Uranus, and Neptune, in order from least to greatest distance from the Sun. They are all found beyond the Asteroid Belt. The gas planets, or "Gas Giants" if you will, are larger and less dense than the other planets. They all have rings and several moons.
Yes. There are at least 90 billion trillion or more planets in the observable universe.