Planet nine - level 2
Scientists have some new and exciting information. They found the ninth planet in the solar system. It is 10 times bigger than Earth and 20 times farther away from the sun than Earth.
However, scientists have not seen the planet yet. They only saw its influence on part of the solar system. They know the planet is there; they just need to find it.
If the planet is real, its orbit is very elliptical.
Difficult words: influence (power), orbit (the journey which a planet travels around something), elliptical (like an ellipse – a flat circle).
You can read the original story and watch the video in the Level 3 section.
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