Largest Star by Massive : Pistol Star
-200 times of solar mass
-25000 light years far away
Largest Star by Luminosity : LBV 1806-20
-38 million solar luminosity
-30000-40000 light years far away
Largest Star by Radius : VY Canis Majoris
-1800 radii
-5000 light years far away
Massive-Star birth
Giant molecular cloud, GMC collapse because of the instability gravitational of the molecules.
And it became a protostar. Which some of them have larger mass than the sun but some don’t.
Things help to find angular size.
1.Inferometer
2. Telescope
