Determine which physical conditions are necessary to support nuclear fusion and formation of stars. lower temperature higher temperature increased gravitational attraction decreased gravitational attraction Promotes Stellar Formation Does Not Promote Stellar Formation

Promotes Stellar Formation:

Higher temperature: Stellar formation is promoted by higher temperatures. High temperatures lead to the initiation of nuclear fusion reactions in the core of a collapsing gas cloud, eventually giving rise to a star.

Increased gravitational attraction: The force of gravity plays a crucial role in stellar formation. An increased gravitational attraction causes gas and dust in a region to collapse, leading to the formation of a protostar.

Does Not Promote Stellar Formation:

Lower temperature: Lower temperatures are not conducive to stellar formation. In order for nuclear fusion to occur and a star to form, high temperatures are required to overcome the repulsive forces between positively charged atomic nuclei.

Decreased gravitational attraction: A decrease in gravitational attraction would hinder the collapse of a gas cloud, making it difficult for the material to come together and form a star. Gravity is essential for pulling the material together to initiate the process of star formation.