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Attempts 127

What planet is the slowest rotating and often referred to as Earth’s “sister planet?”

  1. A
    Mercury
  2. B
    Venus
  3. C
    Venus
  4. D
    Mars

Topic Flashcards

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Question

What is the approximate length of one rotation (a sidereal day) on Venus in Earth days?

Answer

About 243 Earth days.

Question

Venus is often called Earth's "sister planet." What two key physical characteristics are very similar between them?

Answer

Similar size and mass (also similar composition/density).

Question

Venus's rotation is not only slow but also in the opposite direction of most planets. What is this type of rotation called?

Answer

Retrograde rotation.

Question

On Venus, which is longer: its day (one rotation) or its year (one orbit around the Sun)?

Answer

Its day (243 Earth days vs. 225 Earth days for its year).

Question

What is the primary reason Venus, not Mars or Mercury, is most often called Earth's "sister" or "twin"?

Answer

It is the planet closest to Earth in terms of overall size, mass, gravity, and bulk composition.

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Is Venus the closest planet to Earth on average?
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