Neptune, Eris (dwarf planet), Pluto


• Pluto is the smallest planet in the Solar System

• Pluto is cold: -233° C (-390° F), just 40° C (72° F) above absolute zero. At this temperature, all elements would be frozen but neon, hydrogen, and helium.

• Pluto’s journey around the Sun takes 248 Earth years.

• Pluto has one moon, Charon, which is not much smaller than Pluto itself. No other moon is as close to the size of its planet as Charon is to Pluto. (Pluto is 2,280 kilometres wide, Charon is 1,212 kilometres wide).

• Pluto was the smallest and furthest planet from the Sun in our solar system, now it is not even officially recognized as a planet! • In 2006 Pluto was demoted to the status of dwarf planet. • Because it is so far away from the sun it is very cold with temperatures ranging form -235 Degrees Celsius to -210 Degrees Celsius. The planet is so far out it takes light from the sun about 5 and one half hours to reach Pluto in contrast to the 8 minutes it takes to reach Earth. • Pluto consists of rock with a very thick coating of ice. • The atmosphere of Pluto consists of nitrogen with some carbon monoxide and methane. • Pluto has a moon, Charon, about half the size of the planet. Pluto has a moon, Charon, about half the size of the planet.

Pluto is also dark. Because it is so far from the Sun, it does not get all the light that we get here on Earth. Even during the day, the sky of Pluto is as dark as nighttime on Earth. From Pluto’s surface, the Sun looks like a very bright star.

-- How Far Away Is Pluto? –

Because of its size, Pluto has very low gravity and a very thin atmosphere. The atmosphere is full of nitrogen and carbon monoxide, gasses which we humans cannot breather. Without a good atmosphere, especially one with lots of oxygen [pic]

, no Earth life could live on Pluto’s surface.
In addition, Pluto is so cold that we would need amazingly powerful heaters, not to mention a good supply of warm blankets, if we...
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