Part of: Miscellaneous Indian Gk set 267

Phobos and Deimos are the natural satellites of which planet

Category: Miscellaneous Indian Gk

Hint: Consider the number of moons each planet has.

Correct Answer: A) Mars

Exam Relevance: JEE, NEET, UPSC

Difficulty: Easy

Explanations:

The question asks about the natural satellites of a specific planet, and the correct answer is Mars. Phobos and Deimos are the two natural satellites of Mars. These moons are named after the Greek mythological figures Phobos (meaning "fear") and Deimos (meaning "dread"), who were the sons of Ares (the Greek counterpart of Mars, the Roman god of war).

Mars is the fourth planet from the Sun and is often referred to as the "Red Planet" due to its reddish appearance, which is caused by iron oxide (rust) on its surface. The planet has a thin atmosphere composed mostly of carbon dioxide. Mars has been a subject of intense study and exploration due to its potential for past or present microbial life and its suitability for future human colonization.

Phobos is the larger and closer of the two moons, orbiting Mars at a distance of about 6,000 km (3,700 miles) from the planet's surface. It is irregularly shaped and has a diameter of about 22.2 km (13.8 miles). Phobos is gradually spiraling inward due to tidal forces and is expected to either break apart or crash into Mars in about 50 million years.

Deimos, the smaller and more distant moon, orbits Mars at a distance of about 23,500 km (14,600 miles) from the planet's surface. It is also irregularly shaped and has a diameter of about 12.4 km (7.7 miles). Unlike Phobos, Deimos is slowly moving away from Mars.

It is important to note that the moons of Mars are quite different from the moons of other planets in the Solar System. For example, Earth has one large moon, while Jupiter and Saturn have numerous moons, some of which are larger than Phobos and Deimos. Understanding the moons of Mars is crucial for comprehending the overall structure and dynamics of the Solar System.

Other planets in the Solar System have different numbers and types of moons. Mercury and Venus have no moons, while Earth has one, Mars has two, Jupiter has 79 known moons, Saturn has 82, Uranus has 27, and Neptune has 14. Each planet's moons have unique characteristics and play important roles in the planet's gravitational interactions and overall system dynamics.

Option Analysis:
  • Option A: This is the correct answer. Phobos and Deimos are the two natural satellites of Mars. Phobos is the larger and closer moon, while Deimos is smaller and farther from Mars.
  • Option B: Incorrect. Mercury has no natural satellites. It is one of the two planets in the Solar System without any moons.
  • Option C: Incorrect. Neptune has 14 known moons, but Phobos and Deimos are not among them. Neptune's largest moon is Triton.
  • Option D: Incorrect. Uranus has 27 known moons, but Phobos and Deimos are not among them. Uranus' largest moon is Titania.

Mnemonic: Remember "Phobos and Deimos" as "Fear and Dread" which are associated with Mars, the God of War.

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