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The Forbidden Planet - NGTS-4b

Post by Admin,May 29,2019.
News

Astronomers have discovered a rogue exoplanet with its own atmosphere in the Neptunian Desert.

  • NGTS-4b, nick-named ‘The Forbidden Planet’ is smaller than Neptune but three times the size of Earth.
    • The exoplanet has a mass of 20 Earth masses, a radius 20 per cent smaller than Neptune, and temperature of 1000 degrees Celsius.
    • It orbits around the star in only 1.3 days — the equivalent of Earth’s orbit around the Sun of one year.
    • It is the first exoplanet of its kind to have been found in the Neptunian Desert.
  • Neptunian Desert: is the region close to stars where no Neptune-sized planets are found.
    • This area receives strong irradiation from the star. The planets do not retain their gaseous atmosphere as they evaporate leaving just a rocky core.
    • It is believed that the planet may have moved into the Neptunian Desert recently, in the last one million years. It was very big and the atmosphere is still evaporating.
    • This planet must be tough, it is right in the zone where we expected Neptune-sized planets could not survive.
  • Exoplanet Planets: orbit around other stars in outer space. Exoplanets are very hard to see directly with telescopes. They are hidden by the bright glare of the stars they orbit.