Stellar Life Stages

Stars forming today are likely to contain material from earlier generations of stars, enriched with heavier elements. The most massive stars form the heaviest elements and detonate in supernova explosions that scatter them across the galaxy.

Protostars i

Collapsing protosteiiar clouds inside star-forming nebulae form cocoons—knots of gas and dust in which stars develop. A cocoon may separate into dark disk called Bok globules or proplyds.

Pressure and temperature rise

As a protostar collapses under gravity, material near the center flattens into a disk and becomes hotter. Radiation blows away material from above and below the disk.

Protostars i

Collapsing protosteiiar clouds inside star-forming nebulae form cocoons—knots of gas and dust in which stars develop. A cocoon may separate into dark disk called Bok globules or proplyds.

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