Planets: Analyzing the Statements

The question asks us to identify the correct statement(s) about planets among the given options. Let's analyze each statement individually.

Statement (A): Planets are lit by the light of the stars.

This statement is correct. Planets, like Earth, do not produce their own light. They are visible because they reflect the light emitted by their host star. Our own planet, Earth, is illuminated by the Sun, which is a star. Similarly, other planets in different solar systems are lit by their respective stars.

Statement (B): Planets are made up of only rocks.

This statement is incorrect. Planets have diverse compositions. Some planets, known as terrestrial planets (like Mercury, Venus, Earth, and Mars in our solar system), are primarily composed of rock and metal. However, other planets, called gas giants (like Jupiter and Saturn) or ice giants (like Uranus and Neptune), are composed mainly of gases (like hydrogen and helium) or ices (like water, ammonia, and methane), with much smaller rocky or metallic cores.

Therefore, stating that planets are made up of *only* rocks is inaccurate due to the existence of gas and ice giants.

Statement (C): All planets have their moons.

This statement is incorrect. Not all planets in our solar system have moons. For instance, Mercury and Venus do not possess any natural satellites (moons). In contrast, planets like Earth, Mars, Jupiter, Saturn, Uranus, and Neptune do have moons, with some planets having many.

Conclusion on Planets' Statements

Based on the analysis:

• Statement (A) is correct.
• Statement (B) is incorrect.
• Statement (C) is incorrect.

Therefore, the only correct statement about planets among the choices is (A).