3. Planets Orbiting Dwarf Stars
A massive exoplanet called LHS 3154 b, which is 13 times larger than Earth, was discovered orbiting a very cool dwarf star. This planet is similar in size to Neptune, with its star nine times smaller than the sun.
The ratio between a Neptune-sized world and its host star, 51 light years away, is 100 times greater than the mass ratio between the Earth and the sun.
4. Mercury’s twin
Observations with JWST’s Mid-Infrared Instrument (MIRI) found that two inner planets of the Trappist planetary system likely lack atmospheres. TRAPPIST-1b is likely plain rock without an atmosphere with a very hot surface temperature of 232 degrees Celsius (450 degrees Fahrenheit).
The results were followed up with similar findings for TRAPPIST-1c, the next planet in the system, three months later. Astronomers think the lack of atmosphere on these planets is caused by the violent activity of their home stars.
5. Mini Neputunus
Scientists also succeeded in finding Neptune’s twin in 2023. This small planet was named Gliese 1214 b and found that the planet was surrounded by a thick fog or cloud layer.
Gliese 1214 b initially proved difficult to observe due to its light-reflecting atmosphere. However, researchers believe it is possible that the planet contains large amounts of water vapor.
This planet, which is 48 light years away, orbits very close to its home star, so it is unlikely that there will be a sea of water on its surface. This mini-Neptune is smaller than Neptune, but bigger than Earth.
2024-04-04 18:00:00
#Exoplanets #Discovered #Scientists
