50 !
what role do impact craters play on venus? which planet is earth most like? in what ways is this planet like earth?

A crater does not have a role because it just burns up.

Venus is very similar to Earth. But Mars is the planet that is most similar to Earth.. A Martian day is just over 24 hours, and its rotation axis is tilted by about the same amount as Earth's.

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The science wiz

What role do impact craters play on Venus?
Impact craters on Venus are divergent from craters on alternative planets. Since Venus has a broad atmosphere, the atmosphere blocks the lesser items from even joining the exterior and on behalf of the atmosphere, they burn up.

Which planet is Earth most like?
I'd have to say Kepler 452-b, aka Earth 2.0. Although it was just discovered earlier this year, it is the most Earth-like planet. It is past our solar system so it is considered an exoplanet. You might have heard this planet as Earth's older cousin, since it is has spent 6 billion years in the habitable zone of its star, which is longer than Earth. Kepler 452-b is 60% bigger than Earth and has a total of 853 Earth-days of a year. 

If you are looking for a planet that is in the solar system and not an exoplanet, the most similar Earth-like planet would be either Mars or Venus. Mars is the planet that is very similar to Earth, since a day in Mars is just over 24 hours and Earth is just under 24. Mars very similar seasons to Earth's, and Mars's rotation axis is tilted by the same amount as Earth's. Ever since the discovery of liquid on Mars, it has made it even closer to being the planet that is most Earth-like. 

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