In our galaxy, we see stars pulsate. Gravity makes stars
very round. We can describe the pulsations with math. The
patterns depend on two numbers. We call them "l" and "m".
"l" changes the number of hot and cool spots. "m" can only
be between "-l" and "+l". It changes how the hot and cool
spots move around.
Stars are far away. We see brightness changes when "l" is
small. Play with "l" and "m" to see the ways stars pulsate.
Sounds of the Stars
Astronomers Discover New Type of Pulsating White Dwarf Star
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