Our Annual Campaign has begun!
.
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/2023-fundraising-campaign
Wanted: observer mentors!
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https://www.aavso.org/mentor-program#volunteer
The European Space Agency wants your help!
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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
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/welcome
La Ciencia del Cielo para Principiantes
Seminarios web de astronomia gratis en espanol
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/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

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(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 , 8 5 5 , 6 9 2 and Counting ...

Last Observation Received:

3 min 24 sec ago by CCT - Carlos Colesanti (BR)

V0436 CEN   May 24.942   16.119V

Plot V0436 CEN light curve

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
Solar Bulletin - Volume 79, Number 4
May 15
News Archives

Our Stellar Partners


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Unistellar

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NSF

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