Pre-main-sequence stars

star in the stage when it has not yet reached the main sequence

star in the constellation Centaurus

star

star

binary star system in the constellation Centaurus

star

a young, pre-main-sequence star about 5 million years old, of spectral type M1, located in the Upper Scorpius sub-group of the Scorpius–Centaurus Association

star in the constellation Sagittarius

star system

K2-33 is an extremely young pre-main-sequence star located about away from the Earth in the constellation of Scorpius. It is known to host one planet, a super-Neptune, named K2-33b. It is also notable for its young age.

star in the constellation Carina

star in the constellation Chamaeleon