Is there a ninth planet in our solar system? [2016/02/18 09:45]

Scientists said they have found evidence of a giant planet far out in our solar system, U.S. media reported recently.

The California Institute of Technology said this planet travels a strange “highly elongated orbit in the distant solar system.”

The discovery was made by two researchers at Caltech: Konstantin Batygin and Mike Brown. They used mathematical modeling and computer simulations to find the planet. So far, there have not been any direct observations of the planet.

Brown and Batygin reported their findings in the Astronomical Journal. They say that this new planet is so large that there should be no doubt that it is a true planet, once they confirm it.

The scientists said it would take this planet 10,000 to 20,000 years just to make one full orbit around the sun. The new planet, called “Planet Nine,” has a mass about 10 times the size of Earth.

If they are right, the newly found planet would be the ninth planet in our solar system. Pluto had been called the ninth planet until 2006, when it was renamed a “dwarf planet.”

It is believed that the planet orbits, or travels in a circle, around the sun from a great distance. The planet Neptune’s average distance to the sun is about 4.5 billion kilometers. But “Planet Nine” could be 20 times farther away from the sun than that.

While they have not got a picture of “Planet Nine” yet, the scientists say they are using the biggest telescopes on Earth to try to find “Planet Nine.” They are also working on fine-tuning their computer simulations.
출처: 주니어 영자신문 주니어헤럴드(junior.heraldm.com)