|Start||18. 4. 2018|
Brown dwarfs are objects between planets and stars. Astronomers divide them into 3 categories according to their temperature - L, T, Y. Their relatively low temperatures and brightness allow them to stay hidden for most part. Only the most powerful infrared telescopes are able to see them and that is where James Webb Space Telescope comes in.
Astronomers report discovery of two sub-neptune exoplanets orbiting red dwarf star TOI 4342 in near orbital resonance. Year on the inner planet lasts 5.5 days and on the outer planet almost twice as long. That means both bodies meet each other periodically once every year on the second planet.
Astronomers found the planet in space telescope TESS data and confirmed its existence with the SPIRou infrared spectropolarimeter on the Canada France Hawaii Telescope. The exoplanet belongs to a sub-Neptune category and is about 2 times bigger than Earth.
Astronomers discovered 2 new exoplanets orbiting a very cold star LP 890-9. One of the exoplanets seems to be in the habitable zone of the star, and therefore is a very interesting target for future observations. The star LP 890-9 is currently the second coldest star with known exoplanets.