The Jeans instability occurs when: A. the pressure in a gas cloud is less than its gravitational...

Question:

The Jeans instability occurs when:

A. the pressure in a gas cloud is less than its gravitational force.

B. the pressure in a gas cloud is greater than its gravitational force.

C. the temperature in a collapsing cloud is hot enough to fuse hydrogen.

D. the temperature in a collapsing cloud is hot enough to fuse helium.

Star Formation:

The birth, life, and death of stars is of interest to modern astrophysicists, who use various techniques ranging from optical telescopes to sophisticated space-bound devices to capture information. The two main forces that influence the course of a star's life are the pressure building up within the star itself, as well as the gravitational pull of the mass of this material.

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The two forces, the pressure in the gas cloud, and the gravitational force due to the mass inside the cloud, act in opposite directions, that is, the...

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Star Formation: Main Sequence, Dwarf & Giant Stars

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Chapter 11 / Lesson 3
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There are many different types of stars in the universe, including main sequence, dwarf, and giant stars . Learn about these different types and more, as well as the star life cycle, from formation until the end of their life.


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