Python! Finding Frequency Solutions for Variable Star Light Curves
Register for this Saturday's webinar!
Slider Link
https://us02web.zoom.us/webinar/register/6516642155392/WN_yRK1kAPwSsmw4HqrjaKO2g
Book your room at the group rate before the October 4th deadline!
.
Slider Link
/111
New Executive Director
.
Slider Link
/kloppenborg-director-press
Discover the AAVSO
an international community
Slider Link
/welcome
Observe Delta Cephei in September!
360-degree video | Tips for beginners
Slider Link
/featured-variables

old logo

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
/vsx

Pick a Star

Plot a light curve
jaavso
The Journal of the AAVSO
/apps/jaavso
Data
Submit and Access Data
/databases
Telescope
Tools and Observer Resources
/observers
Observing Sections
Observing Sections
/observing-sections
Education
Education
CHOICE Courses, Manuals, Videos
/education
AAVSO In Press
AAVSO In Press
/press
Membership and Support
Membership and Support
/join-aavso

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

AAVSO at a Glance

Variable Star Observations in Database:

5 4 , 3 1 5 , 0 8 8 and Counting ...

Last Observation Received:

6 sec ago by MQA - Alexandr Maidik (UA)

GAM CAS   Aug 28.916   1.8Vis.

Plot GAM CAS light curve

History of AAVSOnet
Sep 28
Alert Notice 792: R Aqr photometry and spectroscopy requested in support of Chandra observations
Sep 21
Solar Bulletin - Volume 78, Number 8
Sep 16
Don't miss the 111th Annual Meeting and Exoplanet Workshop!
Sep 15
AAVSO Selects Dr. Brian Kloppenborg as Executive Director
Sep 13
News Archives

Our Stellar Partners


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