Our Annual Campaign has begun!
.
Slider Link
/2023-fundraising-campaign
Wanted: observer mentors!
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Slider Link
https://www.aavso.org/mentor-program#volunteer
The European Space Agency wants your help!
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Slider Link
https://www.esa.int/Enabling_Support/Preparing_for_the_Future/Space_for_Earth/Amateur_astronomers_needed_help_classify_stars_with_Gaia_s_data
Discover the AAVSO
an international community
Slider Link
/welcome
La Ciencia del Cielo para Principiantes
Seminarios web de astronomia gratis en espanol
Slider Link
/2023-seminarios-web
Look at what we accomplished together!
Fiscal Year 2021-2022
Slider Link
/annual-report

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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
/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 7 , 9 3 6 , 3 0 8 and Counting ...

Last Observation Received:

15 min 1 sec ago by SNE - Neil Simmons (US)

XY Lyr   Jun 8.2347   6.2Vis.

Plot XY Lyr light curve

Annual Campaign - so close...but we need an "angel investor" tomorrow
May 31
Alert Notice 826: Supernova in M101 - SN 2023ixf in NGC 5457
May 22
Alert Notice 825: GP Com being observed with HST
May 22
Aru Bhoop
May 19
2023 Invitation for Board Nominees
May 16
News Archives

Our Stellar Partners


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

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Unistellar

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Text reads DC-3 Dreams Observatory Operating Systems

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

NSF

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