Sizes of Stars and Sub-Stellar Objects From Brown Dwarf to Red Hypergiant

The video explores the sizes of stars, starting with the sun and comparing it to other stars. It discusses the smallest stars, red dwarfs, and substellar objects like brown dwarfs, which do not sustain nuclear fusion. The video then examines the upper mass limits of stars, proposing a theoretical limit of 150 solar masses, and highlights some of the largest known stars, such as Canis Majoris and UY Scuti.

What is the minimum mass required for a gas cloud to trigger nuclear fusion and become a star?

What type of star is formed when a gas cloud has a mass of around 80 Jupiter masses?

What are brown dwarfs and how do they differ from stars?

What happens to stars that exceed the proposed upper mass limit?

What is the proposed upper limit for the mass of a star, and what is its significance?

How does the size of the largest known star, UY Scuti, compare to Canis Majoris?

What are the implications of discovering larger stars than previously thought?