Many believe that Mercury is the hottest planet in the solar system since it is the planet closest to the sun. However, Venus is the hottest planet in the solar system. Runaway greenhouse gases affect the climate of the second planet. For example, the temperatures on Venus vary from -364 to 870 degrees Fahrenheit. The atmosphere on Venus is composed of 96.5% carbon dioxide and 3.5% nitrogen. Traces of carbon monoxide, argon, helium, and neon can also be found in this planet's atmosphere. On Venus, the atmospheric pressure is 90 times heavier than Earth's. The atmosphere of Venus is one thing that causes Venus to be unique. The layers of carbon dioxide and sulfuric acid reflect most sunlight that comes to Venus. This causes Venus to appear brightly
