These two planets are known as 'sister planets' due to their similar size and composition. What are they?

Category: Knowledge · Difficulty: hard

Hint: Both are terrestrial planets, one being the second from the sun.

Answer

Venus and Earth

Explanation

Venus and Earth are often called sister planets due to their comparable size, gravity, and mass.

This is a hard knowledge riddle — a tricky one that takes a little thought. The answer is Venus and Earth.

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