Star formation

Definition

Star formation is the process by which dense regions within molecular clouds in interstellar space collapse to form stars. This often results in the creation of a cluster of stars rather than a single star.

5 Must Know Facts For Your Next Test

1. Stars form in molecular clouds, often called stellar nurseries.
2. The process of star formation typically begins with the gravitational collapse of a region within a molecular cloud.
3. Protostars are early-stage stars that form before nuclear fusion begins.
4. The Jeans instability criterion determines whether a region within a cloud will begin to collapse under its own gravity.
5. Star formation is often accompanied by the formation of protoplanetary disks, which can eventually lead to planet formation.

Review Questions

Related terms

Molecular Cloud:

Large, cold regions of gas and dust where new stars are born

Protostar:

A young star still in the process of forming, before nuclear fusion starts

Protoplanetary Disk:

A rotating disk of dense gas surrounding a newly formed star, from which planets may eventually form