15 M sun star will end its main sequence life earlier. the 15M sun protostar will be more luminous.
How is a large protostar different from a small protostar?
- Outer space gas clouds are where stars first start to develop.
- These clouds' frigid temperatures and high densities (in comparison to other regions of space, but in comparison to a vacuum on Earth) enable gravity to overcome thermal pressure and initiate the gravitational collapse that would result in the formation of a star.
- A protostar resembles a star, but its core is still too cool for fusion to occur.
- The protostar's heating as it contracts is the only source of brightness.
- The light that protostars release is typically blocked by dust, making them challenging to study in the visible spectrum.
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