No, humans cannot live on Neptune. Neptune is approximately 1.8 billion miles from the sun which makes it very cold. Temperatures on Neptune can reach 346 degrees below zero Fahrenheit.

Neptune is one of the planets that is in the solar systems outer orbit, so it's very cold. Because of the horrific temperatures, negative 200 degrees Celsius, people couldn't live on Neptune. You can find more information here: http://library.thinkquest.org/J001663F/n...