Venus

A scorching hot rocky planet with thick clouds of sulfuric acid, crushing atmospheric pressure 90 times that of Earth, and a surface hot enough to melt lead due to a runaway greenhouse effect.

Neptune

The eighth and most distant planet, Neptune is a cold, windy ice giant with a vivid blue color, powerful storms, supersonic winds reaching 1,200 mph, and a collection of 14 known moons including the geologically active Triton.

A pioneering spacecraft launched in 1997 that explored Saturn and its moons for 13 years, discovering ocean worlds and atmospheric phenomena before deliberately plunging into Saturn's atmosphere in 2017 after completing 294 orbits of the planet.