Annual Meeting: Registration Closed
Join keynote speakers Brad Schaefer and Sukanya Chakrabarti (UAH), plus two days of talks online!
Slider Link
https://www.aavso.org/113
AAVSO Board Election: Voting & Candidates
Voting in this election is open only to members in good standing.
Slider Link
https://www.aavso.org/2024-board-candidates
Webinar | Things I Thought I’d Never See
Presenter: Bob King | Saturday, December 7 at 2p.m. ET | Pre-Registration Required.
Slider Link
https://us02web.zoom.us/webinar/register/9217299562829/WN_U_yVT5RKQXWCTAovTByNTA
We Have a New Login System
Click Here to Learn More
Slider Link
/new-login
Discover the AAVSO
An international community
Slider Link
/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.
Slider Link
https://forums.aavso.org/

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 the Press
AAVSO In the 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:

6 5 , 1 3 8 , 5 6 6 and Counting ...

Last Observation Received:

5 min 16 sec ago by SDR - Robert Stephens (US)

ST TRI   Nov 8.4672   14.266V

Plot ST TRI light curve

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
Alert Notice - Observing Campaign #872: Nova in Sco: N Sco 2024 No. 3 = V1725 Sco (TCP J17064645-3528079)
Sep 11
News Archives

Our Stellar Partners


orange circle with with snake next to the words "The Astropy Project"

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

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