Between 23 July and 15 September 2008 , Mars Express carried out eight flybys of Phobos, sweeping past at distances ranging from 4,500 km to only 93 km. Features as small as 3 meters across can be seen. Phobos is 27 km across at its widest point and has a large impact crater on one side. The two moons lay so close to the planet that they were hidden by the glare of Mars.

In fact, the moon is getting closer to Mars over the centuries, and eventually will either break up or be pulled into the Martian surface.In the early 17th century, German astronomer Johannes Kepler proposed that Mars might host two moons, given that it lay between the Earth and Jupiter, which were known to have one and four satellites. As the moon revolves, the debris is redeposited as a dusty layer on its surface.Managed by the Mars Exploration Program and the Jet Propulsion Laboratory for NASA’s Science Mission Directorate Deimos was discovered on August 12, 1877 by American astron…

Phobos is a small, irregularly shaped object with a mean radius of 11 km (7 mi) and is seven times as massive as the outer moon, Deimos.

One prominent proponent was the science adviser to President Dwight D. Eisenhower.

In Greek mythology, Deimos represents dread, and is one of the sons of Ares (Mars) and Aphrodite (Venus). Mars Express is the only spacecraft presently operating around the Red Planet which is in a highly elliptical (egg-shaped) orbit. This image shows on the upper right side, is a small white circle against a black background representing Phobos, with a smaller black circle representing Deimos a little above and to the right of it.

It flies around Mars three times in one Martian day. While our Moon orbits at a healthy distance of 384,000 kilometers from the Earth, Phobos is only 9,378 kilometers distant from Mars and Deimos is a little farther out at 23,459 kilometers.

The team also fueled the rover's sky crane to get ready for this summer's history-making launch. With a length of only 9.9 miles (11 km), It is also one of the smallest known moons in the Solar System. The Soviet Phobos 2 mission, NASA's In 2011, Russia attempted to send a mission to the Martian moon called Phobos-Grunt, which was supposed to come back to Earth in 2014 bearing a small sample of the moon.

It is very dark - blacker than coal – and heavily cratered.


In fact, Phobos starts out below Deimos, the smaller dot, and quickly moves past it in the sequence.
Above and to the left of it is a smaller white dot, representing Deimos, that also moves upward and to the right but at a much slower pace. This path takes it across the orbit of Phobos, enabling it to see all sides of the little moon. Phobos is named after the Greek god Phobos, a son of Ares (Mars) and Aphrodite (Venus) and the personification of fear (cf. Deimos is about 8 km across at its widest part. Deimos is even smaller – one of the smallest moons in the Solar System. Large blocks, 10 to 30 meters across, are also visible. Phobos and Deimos are Moons of Mars. PADME competed in NASA's Discovery Program but lost out to the Some human spaceflight proponents have also suggested NASA should "We found that astronauts or rovers could accumulate significant electric charges when traversing the night side of Phobos — the side facing Mars during the Martian day," William Farrell of NASA's Goddard Space Flight Center, Greenbelt, Maryland, said in a "While we don't expect these charges to be large enough to injure an astronaut, they are potentially large enough to affect sensitive equipment, so we would need to design spacesuits and equipment that minimizes any charging hazard. Deimos est en orbite autour de Mars à une distance moyenne de 23 458 km. The doomed moon is spiraling inward at a rate of 1.8 centimeters (seven-tenths of an inch) per year, or 1.8 meters (about 6 feet) each century.

L'excentricité de l'orbite de Deimos qui est de 0,00033 fait varier sa distance à Mars de … After the rover was shipped from JPL to Kennedy Space Center, the team is getting closer to finalizing the spacecraft for launch later this summer.

Both Deimos and Phobos have similar temperatures ranging from 25 degrees F/-4 degrees C on the side that is sunlit and -170 degrees F/-112 degrees C on the dark side. The composition and odd shape led some scientists to conclude that Phobos and Deimos came from the asteroid belt, with Jupiter's gravity long ago nudging them into orbit around Mars.Instead, the moons may have formed as satellites around Mars, with dust and rock drawn together by gravity. Phobos (fear) and Deimos (panic) were named after the horses that pulled the chariot of the Greek war god Ares, the counterpart to the Roman war god Mars. deimos Le second satellite de Mars et le plus petit, 12 km de diamètre.

While our Moon orbits at a healthy distance of 384,000 kilometers from the Earth, Phobos is only 9,378 kilometers distant from Mars and Deimos is a little farther out at 23,459 kilometers. Deimos is the smaller of the two Martian moons and is less irregular in shape. No evidence of such moons could be found. Deimos is moving farther away from the planet Mars. The twin sons attended their father in battle. Features as small as 3 meters across can be seen.

More than 130 years later, scientists are still trying to unravel the mysteries of these moons.


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