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Annual Meeting | U.S. Space & Rocket Center

Join keynote speakers Brad Schaefer, John Blevins (NASA), and Sukanya Chakrabarti (UAH) in Huntsville, Alabama!

https://www.aavso.org/113

AAVSO Board Election: Voting & Candidates

Voting in this election is open only to members in good standing.

https://www.aavso.org/2024-board-candidates

We Have a New Login System

Click Here to Learn More

Webinar | Mapping Wide Binaries using Pulsation Timing Variations

Presenter: Shishir Dholakia | Saturday, October 26 at 2p.m. ET | Pre-Registration Required.

https://us02web.zoom.us/webinar/register/1417261679442/WN_MW1fuXVeRBCk_jxxJOTZJg

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

/index.php/apps/jaavso

Data

Submit and Access Data

/index.php/databases

Telescope

Tools and Observer Resources

/index.php/observers

Observing Sections

Observing Sections

/index.php/observing-sections

Education

Education

CHOICE Courses, Manuals, Videos

/index.php/education

AAVSO In the Press

AAVSO In the Press

/index.php/press

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:

6 4 , 9 1 2 , 5 0 3 and Counting ...

Last Observation Received:

3 min 54 sec ago by OAR - Arto Oksanen (FI)

M31N 2008-12A Oct 15.8432 <20.847CV

Plot M31N 2008-12A light curve

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

Alert Notice - Observing Campaign #870: Unveiling CI Hyi as a symbiotic system

Sep 10

Our Stellar Partners

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

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

Black outline of an intricately dressed being with accentuated features

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