Question

Provided following are various stages during the life of a high-mass star. Rank the stages based on when they occur, from first to last.

a. contracting cloud of gas and dust
b. protostar
c. main sequence o star
d. red supergiant
e. supernova
f. neutron star

Answer 1

Star dust clouds form then a protostar then a red super giant a supernova or a neutron star can form then finally a white star which is when the star dies and turns black

Answer 2

Following is the order of ranks involved in the life of a star from the beginning to end:

• contracting cloud of gas and dust
• protostar
• main-sequence O star
• red supergiant
• supernova
• neutron star

Explanation:

• The formation of a star begins with the accumulation of gas and dust.

• The stage right before the formation of an actual star is that of a protostar.

• In this stage, the dust and gas material comes close rapidly and finally culminates in the star formation.

• During the course of its life, the size of the star grows as long as it becomes a red supergiant.

• Towards the end of its life, there is a supernova explosion and what is finally left is known as a 'neutron star'.