Venus Click to see full answer. In this way, what planets are closest to Earth right now?The answer most people would give is Venus. But … it might actually be Mercury. Although Venus is the planet that comes closest to Earth as it sweeps by on its orbit, Mercury stays the closest to Earth the longest, according to a commentary published Tuesday (March 12) in the magazine Physics Today.Also, which planets are roughly the same size? Venus and the Earth are roughly similar in size (I think Venus is slightly smaller). Both are so-called “rock based” planets, unlike Jupiter, Saturn, Uranus and Neptune, which are gas giants, although they may have a rocky core. Also to know is, which planets are smaller than the Earth? Mercury. Mercury—the smallest planet in our solar system and closest to the Sun—is only slightly larger than Earth’s Moon.Is MaRS Hot or cold?Overall, Mars is cold—its average global temperature is around -80 degrees Fahrenheit—and has a much thinner atmosphere than Earth. Because it has about a sixth of the pressure of Earth’s atmosphere, the planet doesn’t retain heat very long, causing temperatures to drop quickly.
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