Gliese 54 B kann gefunden werden in südlich himmelshalbkugel.
Rote Zwerge sind kleine rötliche Sterne, die bei weitem die häufigste Sternart in der Sonnenumgebung sind. Ihre Masse liegt normalerweise zwischen 10 und 50 % der Sonnenmasse.
Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.
Astronomers discovered two new exoplanets orbiting a star HIP 104045. The star is 175 light years away and its mass and size are similar to the Sun. Both exoplanets are gas giants, smaller than Jupiter.
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.