Water Worlds 218 light years away detected

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Overview:

Recently scientists have discovered two water worlds which are 218 lights years away from the earth.

Why in the News?

Two alien planets about 218 light years away from Earth have found a twin in the ocean worlds of Europa and Enceladus- moons orbiting Jupiter and Saturn.

Key findings

  • The exoplanets, Kepler-138 c and Kepler-138 d, are likely water worlds, a feature that scientists have theorised for a long time.
  • These twin planets of the same size and mass are more massive than Earth but lighter than ice giants Uranus and Neptune.
  • They are different from the planets in our solar system, which is chiefly composed of rocky planets like Earth and gas giants like Jupiter.
  • The Kepler- 138 c and d are made up of ingredients lighter than rock (rocky planets like Earth) but heavier than hydrogen or helium (gas-giant planets like Jupiter).
  • The new planet takes 38 days to complete an orbit.
  • It is in the habitable zone, meaning it is located in an orbit that receives just the right amount of heat from its star to allow water to exist in a liquid form.

 


Q1) What are exoplanets?

Exoplanets are planets that orbit a star other than the sun.These worlds are far outside our own solar system. Astronomers have confirmed more than 5,000 exoplanets orbiting distant stars.

Source: Down to Earth