:: Phobos

Phobos is one of the two satellites (moons) of Mars, Deimos his neighbor is a bit smaller.
As you probably know the asteroid belt is between Mars and Jupiter and we think that Phobos was an asteroid from this belt captured by the gravity of Mars and has become one of its moons.
It has a very small size and is not a sphere which is another reason for us to assume that it was an asteroid.
Diameter:10km
Discovered by: Asaph Hall
Discovery date: August 18, 1877

:: methane on mars

In 2004 esa discovered methane on mars which means that either there is life on Mars, or that volcanic activity continues to generate heat below the martian surface.

:: Mars [video]

I found a video who explains a lot about Mars...

:: Tout autour de Mars [vidéo]

:: Mars 2 moons: deimos and Phobos

Mars has two moons : Phobos and Deimos.

Phobos:

Diameter: 10 kms

Distance to Mars: 9000 kms

It is composed of different kinds of rocks.

It looks like an asteroid.

Deimos:

Dimensions (it is not round): 10 x 12 x 15 kms.

:: Mars

It is located just after the Earth and it is the seventh largest planet.

It is red because its desertic surface made of rocks, has a reddish colour, due to the clouds of iron dioxide raised by strong winds.

For the Romans, Mars was the God of war.

Mars is visible at night without a telescope.

The first satellite to visit Mars was Mariner 4; it was followed by others.

The largest volcano in the solar system is situated on Mars, it is called Olympus Mons. The Diameter of Olympus is 648 km and its height is 22.5 kilometers.

Scientists are still trying to discover if there was life on Mars a long time ago, a proof that there could be is that astronomers are sure that there has been water on mars. NASA's Phoenix mars lander discovered water ice on mars the fourth august 2007.

• Distance to the sun: 228 million kms.
• Diameter: 6794 kms.
• Duration of revolution: 687 days.
• Duration of rotation: 1 days and 37 minutes.
• Temperature: -133 °c to 27°c!!!