Neptune, the eighth planet from the sun, cannot support life according to NASA. Being so far from the sun makes Neptune a very cold planet, with temperatures reaching as low as -361. More »

According to NASA, 7 billion years ago, Mars may have been an excellent place for microbes to live, but currently it cannot support life because the air is too thin and is comprised mainly of carbon dioxide. After drilli... More »

The Cassini-Huygens satellite showed between 2005 to 2006 that Saturn's atmosphere had oxygen ions and one of its moons had water geysers; however, several factors impede human life on the planet. One reason people canno... More »

The planet Neptune is incapable of supporting life as we know it, according to NASA. One major reason for this is because of the effective temperature, which is about minus 353 degrees Fahrenheit. More »

www.reference.com Science Astronomy Planets

One year on Neptune is equal to around 165 Earth years or 60,190 Earth days, which is the amount of time it takes the planet to complete its orbit around the sun. Days on Neptune last about 16 hours, which is 8 hours les... More »

Neptune is the solar system's farthest planet from the sun, located an average of 2.79 billion miles away. The circumference of its orbit is 17.56 billion miles, more than 30 times the orbit circumference of Earth. Its v... More »

Neptune is the eighth planet from the sun, and it's about 2.8 billion miles away from the sun. This distance is roughly 30 times further away from the sun than Earth is, making Neptune a cold and dark planet. More »