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The mission of the AAVSO is to enable anyone, anywhere to participate in scientific discovery through variable star astronomy. 

Resources

VSX Logo
(VSX) Variable Star Index

Pick a Star

Plot a light curve
jaavso
The Journal of the AAVSO
Data
Submit and Access Data
Telescope
Tools and Observer Resources
Observing Sections
Observing Sections
Education
Education
CHOICE Courses, Manuals, Videos
AAVSO In Press
AAVSO In Press
Membership and Support
Membership and Support

The AAVSO is an equal opportunity and discrimination / harassment free environment. 
Please read our policies HERE

AAVSO at a Glance

Our Stellar Partners


orange circle with with snake next to the words "The Astropy Project"

Diffraction Limited logo of a swirled circle with text: Diffraction: Astronomy + Scientific Imaging SolutionsIm

Chroma Technology logo: the word chroma goes through a bright rainbow-colored hoop

Black outline of an intricately dressed being with accentuated features

Unistellar

Boyce Astro Logo

Text reads DC-3 Dreams Observatory Operating Systems

Text reads "Sky & Telescope" with the ampersand in a circle.

NSF

NASA Logo