Stellar Evolution - Year 2

Question 1

Where do stars form?

Answer 1

Cool dense molecular clouds

In spiral arms of galaxies

Question 2

What is a protostar?

Answer 2

Collapsing fragment of molecular cloud

Question 3

When is a star “born”?

Answer 3

When hydrogen fusion begins

Enters main sequence

Question 4

What balances gravity in a main sequence star?

Answer 4

Radiation pressure outward

Gravity inward