By: My Space
Today we know that there are billions of planets in our own milky way galaxy. And there are trillions of galaxy in our universe.
But now astronomers found two exoplanets that are water worlds, with up to half of these planets' mass.
These two water worlds inhabit a solar system 218 light-years away and are "unlike any planets in our Solar System".
These two exoplanets are called Kepler-138 c and Kepler-138 d, named after NASA's Kepler Space Telescope.
These planets are three times the size of Earth, but much less massive, meaning they're considerably less dense.
Kepler-138 c and Kepler-138 d more similar the ice covered moons in our solar system, just like Jupiter's Europa and Saturn's Enceladus.
We don't get any direct proof of water on these planets, but on the basis of composition based on their mass, size, and other factors
All these factors suggest that they composed of "materials that are lighter than rock but heavier than hydrogen or helium, which is "Water".
Our most powerful telescope James Webb Telescope can find direct evidence of elements in planets cloud
By using equipment called spectrometers, the Webb telescope can detect important elements and molecules in a distant world's clouds.