World Builders™
World Builders™
Session One   --  Astronomy
Session One   --  Astronomy



             The Life Cycle of a Star
             The Life Cycle of a Star

The mass of a star is a very important clue to its life cycle and destiny.

When we talk about the masses of stars, we use 1 M = 1 solar mass. 
           A 0.5 M star has half the mass of our sun.
           A 6 M star has six times as much mass of our sun.
 

Gravity pulls space debris together to form a protostar.

> 1/10

  Protostar is more than 1/10 of our Sun's mass

This object is too small to ever be a star.


 

Moons can be further away, but not closer than the Roche Limit.


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Picture of Saturn  is from a NASA photograph

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© 1998, 2003. Elizabeth Anne Viau. All rights reserved. This material may be used by individuals for instructional purposes but not sold. Please inform the author if you use it at eviau@earthlink.net.