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Venus is the most Earth-like planet in the solar system (it’s similar in size, mass, and composition); however, it is terribly unEarth-like. Similar to Earth, Venus has an atmosphere that envelops the planet. However, this is a extremely dense atmosphere that is full of greenhouse gasses. In fact, the atmosphere is so thick that is causes the surface temperatures on the planet to exceed 870 °F (465 °C), which, by the way, is hot enough to melt lead.

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The Incredible Shrinking Mercury is Active After All | NASA Surprising new NASA-funded research suggests that Mercury is contracting even today Sept. 26, 2016: It’s small, it’s hot, and it’s shrinking. Surprising new NASA-funded research suggests that Mercury is contracting even today, joining Earth as a tectonically active planet. Images obtained by NASA’s MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft reveal previously undetected small fault…

Apollo 11 - Buzz Aldrin at the lunar module