Mercury has no known moons.

Meaning: This sentence informs us that Mercury does not have any moons that we know about.

Choice of Words: Mercury is the closest planet to the Sun and is the smallest planet in our solar system. No means not any. Known means that we have information or knowledge about something. Moons are natural satellites that orbit a planet.

Alternative Expressions

There are no moons around Mercury.

Meaning: This means the same as the first sentence. It means that the planet Mercury does not have any moons.

Choice of Words: There is used to indicate a location or place. Are is a verb that means to exist. No means not any. Moons are like our moon. It is a natural object that goes around a planet. Around means in a circle. So, There are no moons around Mercury means that there are no moons that go around the planet Mercury.

Mercury is the only planet without moons.

Meaning: This means the same as the first two sentences. It means that the planet Mercury is the only planet in our solar system that does not have any moons.

Choice of Words: Mercury is the name of the planet we are talking about. Only means the only one. Planet is a large object in space that goes around a star. Without means not having. Moons are like our moon. It is a natural object that goes around a planet. So, Mercury is the only planet without moons means that Mercury is the only planet in our solar system that does not have any moons.

Related Expressions