How stars are born and die
Chapter 1
The stellar nurseries
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Chapter 2
The long adult life of stars
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Chapter 3
The dramatic deaths of small stars
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Chapter 4
Supernovas and cosmic leftovers
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YOUR GOAL
Master of How stars are born and die
Ch 2 · The long adult life of stars
teacher Fighting off the gravity, we are burning hydrogen to hold our ground and shine!
Fun Fact
Sun energy output: The energy produced by the Sun core every second equals about 100 billion hydrogen bombs.
Glossary
main sequence (noun)
A major grouping of stars on the Hertzsprung-Russell diagram containing most of the known stellar population. Our Sun has resided in this stable, hydrogen-fusing stage for the last 4.6 billion years.
A major grouping of stars on the Hertzsprung-Russell diagram containing most of the known stellar population. Our Sun has resided in this stable, hydrogen-fusing stage for the last 4.6 billion years.
Quiz
Which type of star has the longest lifespan, potentially living for trillions of years?
Quiz
What star in the Orion constellation is a famous example of a hot, short-lived blue giant?
Quiz
What is the scientific term for the balance between gravity pulling inward and gas pressure pushing outward in a star?
Quiz
What is the stable phase of a star's life called where it spends most of its time?