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Mercury.

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16y ago

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What planet has a very hot surface and is most like Earth in size?

It is Venus.


What is the first inner planet?

The first inner planet is Mercury. It is the closest planet to the Sun in our solar system and is known for its extreme temperature variations, ranging from very hot to very cold.


What is a planet that is very hot and has sulfric acid in its clouds?

Venus is a planet that is very hot and has sulfuric acid in its clouds. The thick atmosphere on Venus creates a strong greenhouse effect, trapping heat and leading to surface temperatures hot enough to melt lead. The clouds on Venus are composed of sulfuric acid droplets.


A planet with a thin atmosphere is?

Hard to say, as the distance from the star will also factor in, but in general, thin atmosphere would mean no insulation, it would be cold. Mars is a classic example of a planet having a thin atmosphere. It is extremely cold on Mars and has a small amount of carbon dioxide in it's atmosphere but is not in high enough concentration to warm the planet. Mercury has no atmosphere and it is hot and cold depending on which part of the planet is facing the Sun. Venus has a very dense amosphere and it is very hot, no matter which surface is facing the Sun.


Aside from Earth which inner planet could humans visit most easily?

Mars. Venus is too hot--hottest planet in the solar system also has very poisonous clouds for an atmosphere. Mercury has no atmosphere. The other planets are gas giants--intense pressures and gravity with no real solid surface.The dwarf planet Pluto is smaller than our moon, but very far away. Mars would be the easiest to visit. And of course, the dwarf planet Eris and the other planets farther than Pluto are outta the question