Answer» Correct Answer - Option 4 : Deimos and Phobos
Explanation: - Phobos and Deimos are the two moons of MARS that are irregular in shape.
- The moons of Mars are some of the tiniest in the solar system.
- Phobos and Deimos, like Earth's Moon, show the same face as mars. Both are lumpy and heavily cratered, with dust and loose rocks covering them.
- They both are irregular in shape.
- They are among the solar system's darker objects.
- The moons tend to be captured asteroids made of carbon-rich rock mixed with ice.
1.Phobos : - Phobos is marginally bigger than Deimos and orbits Mars at a distance of just 6,000 kilometers.
- There is no known moon that orbits its planet closer. It orbits Mars three times a day,
- Phobos is spiraling inward, drawing closer to the earth by around six feet (1.8 meters) per century. It would either collide with Mars or break up and form a ring around the earth in 50 million years.
2. Deimos : - Takes 30 hours to complete each orbit.
- Outermost moon of Mars
- It is 23,460 kilometers away from mars
Discovery- - Asaph Hall discovered the moons of mars in 1877.
- The moon's names were assigned by Hall after the mythological sons of Ares, the Greek equivalent of Mars. Phobos is the Greek word for terror, and Deimos is the Greek word for dread. Fitting titles for a war god's sons.
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