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Home | aavso

Thank You All for a Great Time!

The Annual Meeting was a great success. A big "thank you" to speakers, sponsors and attendees.

https://www.aavso.org/113

Webinar | Things I Thought I’d Never See

Presenter: Bob King | Saturday, December 7 at 2p.m. ET | Pre-Registration Required.

https://us02web.zoom.us/webinar/register/9217299562829/WN_U_yVT5RKQXWCTAovTByNTA

Donate to the AAVSO!

Your support will provide opportunities that will influence generations of observers.

https://www.aavso.org/annual-campaigns/2025-annual-campaign?utm_source=slider&utm_medium=web&utm_campaign=ac25&utm_content=hps241112

Discover the AAVSO

An international community

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.

https://forums.aavso.org/

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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) Variable Star Index

jaavso

The Journal of the AAVSO

Data

Submit and Access Data

Telescope

Tools and Observer Resources

Observing Sections

Observing Sections

/observing-sections

Education

Education

CHOICE Courses, Manuals, Videos

AAVSO In the Press

AAVSO In the Press

Membership and Support

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:

6 5 , 3 4 4 , 7 9 1 and Counting ...

Last Observation Received:

30 sec ago by SLH - Larry Shotter (US)

ss cyg Nov 26.9632 11.8Vis.

Plot ss cyg light curve

Board Election Results

Nov 19

Director's Report - 2024-Q3

Oct 23

Clinton B. Ford Observatory Destroyed by Fire

Oct 7

What to Do During the Eruption of T CrB

Sep 17

2024 Proposed Bylaw Revisions

Sep 13

Our Stellar Partners

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

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