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Of the 3,869 confirmed exoplanets, scientists have only discovered a few "hot Neptunes".
Science Alert writes
Astrophysicists at the University of Geneva have come to the conclusion that a small number of planets of this type were due to their very high temperatures: the celestial bodies are rapidly losing their atmosphere.
"Hot Neptune" – a class of exoplanets whose mass is close to that of Neptune or Uranus. These cosmic bodies are always close to their star, at a distance of at most 1 astronomical unit.
The researchers studied the gas giant GJ 3470b located in the constellation of Cancer, 97 light years from Earth. The exoplanet is close to a bright, sun-like bright sun.
Observations have shown that the GJ 3470b was losing an atmosphere at a very high speed – every second in the outer space near Neptune, very hot, throws 15,000 tons of hydrogen and d & # 39; other gases or 10 to 16% of cosmic body atmospheres every billion years.
"We have discovered a planet that is so rapidly losing its atmosphere that this process is affecting the course of its evolution and has already lost more than a third of its mass." We had not already suspected this phenomenon related to absent Neptune analogues, whose existence clearly explains why we find so many super-lands. "
Read also: " Find 20,000 exoplanets in 2 years. All you need to know about the new NASA telescope.
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