AAVSO (American Association of Variable Star Observers)

The American Association of Variable Star Observers (AAVSO) is a nonprofit organization that brings together amateur and professional astronomers to study and monitor variable stars—stars whose brightness changes over time. Members observe these stars using telescopes or even just binoculars, recording data that helps scientists understand stellar behavior and evolution. The AAVSO collects and shares this data globally, supporting research and fostering collaboration in astronomy. Essentially, it empowers enthusiasts to contribute valuable scientific observations that deepen our knowledge of the dynamic universe.