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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

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 4 , 9 1 2 , 6 6 1 and Counting ...

Last Observation Received:

5 min 56 sec ago by TRE - Ray Tomlin (US)

ASASSN-V J190551.26+734959.1 Oct 4.1223 14.892V

Plot ASASSN-V J190551.26+734959.1 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"

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

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