What forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star?

Discuss stellar evolution. What forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star?

Life vs. Intelligent Life

1. Contrast life to intelligent life? 2. Would it be possible to receive and understand a message from an extraterrestrial intelligent civilization.

Description of Stars

Here is what I would like some comments on: brief overview of the nature and importance of light and other electromagnetic waves. How stars fit in the hierarchy of the universe characteristics of stars Processes by which stars live and die how the materials are recycled and how this process might be related to the structure of the Milky Way Galaxy and to the origin of the universe. Need to consider these facts in describing the life cycle of stars: Stars seem unchanging, but they are not. Stars are born from the interstellar medium, become main sequence stars, use up sources of energy, and then ultimately die. During this time, the star can change dramatically. T... click for more

What are the conditions necessary for life to take root, evolve, and flourish? Where might we find these outside of Earth? The solar system?

What are the conditions necessary for life to take root, evolve, and flourish? Where might we find these outside of Earth? The solar system?

Why are water and carbon essential to live?

Why are water and carbon essential to live?