Webinar | Meet the Candidates
Join us as we hear from each of the candidates running in the AAVSO's FY26 Board election. | October 4 @ 2:00pm ET on Zoom.
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https://us02web.zoom.us/webinar/register/1217574098520/WN_dUnFAl5aRD2mT63JrSiwYA
AAVSO 114th Annual Meeting
The agenda is currently under development—check often for updates!
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https://www.aavso.org/114
They Might Be Hypergiants
AAVSO data has helped unveil the mysteries of Rho Cas and stars like it.
Slider Link
https://www.aavso.org/blog/they-might-be-hypergiants
A Universe of Opportunity: The Future of Small Telescope Science in the LSST Era
Each time a major sky survey comes online, the inevitable question arises: “Is this the end of amateur astronomy?”
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https://www.aavso.org/blog/future-of-small-telescope-science
Discover the AAVSO
An international community
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/welcome
Welcome to the conversation.
We are excited to announce a transition to a new forum system. The new system is modern, faster, and easier-to-use.
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https://forums.aavso.org/
Call for Nominations
Submit your recommendations for recipients of the Merit Award and the William Tyler Olcott Distinguished Service Award.
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https://docs.google.com/forms/d/e/1FAIpQLSdF6dmZGDOzE5nzlhjMqOn5DCoYrinW-bIp8gnB1jcaosJe_A/viewform?usp=header

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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
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Pick a Star

Plot a light curve
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The Journal of the AAVSO
/index.php/apps/jaavso
Data
Submit and Access Data
/index.php/databases
Telescope
Tools and Observer Resources
/index.php/observers
Observing Sections
Observing Sections
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Education
Education
CHOICE Courses, Manuals, Videos
/index.php/education
AAVSO In the Press
AAVSO In the Press
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Membership and Support
Membership and Support
/index.php/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:

7 3 , 0 2 4 , 6 4 8 and Counting ...

Last Observation Received:

6 min 41 sec ago by CK - Stephen Cook (US)

V2546 CYG   Sep 20.3828   11.128V

Plot V2546 CYG light curve

Voting and Candidates for the 2025 AAVSO Board Election
Sep 18
An Invitation to Board Nominees
Aug 5
JAAVSO Volume 53, Number 1, June 2025, print version now available
Jul 2
A Universe of Opportunity: The Future of Small Telescope Science in the LSST Era
Jul 1
Remark-O-Matic
Jun 25
News Archives

Our Stellar Partners


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Unistellar

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