GENERAL KNOWLEDGE

GK

BIG BANG THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A protostar is
A
Among the most massive and brightest stars
B
A young star in the early stages of formation
C
A very dense star that remains after the fusion in a red giant
D
A dead star
Explanation: 

Detailed explanation-1: -A protostar is a very young star that is still gathering mass from its parent molecular cloud. The protostellar phase is the earliest one in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500, 000 years.

Detailed explanation-2: -Star Formation As the cloud collapses, the material at the center begins to heat up. Known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star.

Detailed explanation-3: -An object is considered a protostar for as long as material is still falling inward. For our Sun, and stars of the same mass, the protostar phase would have ended after approximately 100, 000 years. After this, the protostar stops growing and the disk of material surrounding it is destroyed by radiation.

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