Phobos 1 was an uncrewed Soviet space probe of the Phobos Program launched from the Baikonur launch facility on 7 July 1988. Its intended mission was to explore Mars and its moon Phobos and Deimos.
Mars Pathfinder was the first-ever robotic rover to the surface of the red planet Mars. The Opportunity was the second of the two rovers launched in 2003. There are lots of asteroids in our solar system. Most of them are located in the main asteroid belt- a region between the orbits of Mars and Jupiter. The Trojan asteroids are affected by Jupiter's gravity.
The lowest gravitational potential energy of a system of particles is achieved when they form a sphere as opposed to a disk. This is why many smaller objects like asteroids and even Mars's two moons are shaped like lumpy boulders and so is our moon also spherical in shape.
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