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/
Webinar | Starspots & Transiting Exoplanets
Join Dr. William Waalkes on April 5 to learn the challenges of understanding planets transiting spotted stars.
Slider Link
https://us02web.zoom.us/webinar/register/9017393997787/WN_4gs0OjDkQ66qH9bDyu8gEg
RW Cephei, King of Kings
The physical processes behind a hypergiant’s “great dimming” may have been unlocked by high-resolution imagery and a century’s worth of AAVSO observations
Slider Link
https://www.aavso.org/blog/rw-cephei
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/
Webinar | Starspots & Transiting Exoplanets
Join Dr. William Waalkes on April 5 to learn the challenges of understanding planets transiting spotted stars.
Slider Link
https://us02web.zoom.us/webinar/register/9017393997787/WN_4gs0OjDkQ66qH9bDyu8gEg
RW Cephei, King of Kings
The physical processes behind a hypergiant’s “great dimming” may have been unlocked by high-resolution imagery and a century’s worth of AAVSO observations
Slider Link
https://www.aavso.org/blog/rw-cephei

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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 Logo
(VSX) Variable Star Index
/index.php/vsx

Pick a Star

Plot a light curve
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
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 7 , 7 6 5 , 0 0 5 and Counting ...

Last Observation Received:

31 sec ago by EMAC - Mark Ellison (US)

V778 Cas   Mar 26.0979   8.2Vis.

Plot V778 Cas light curve

New Data Search and Submit Applications
Mar 6
Blazed and Confused
Feb 24
Director's Report for 2024-Q4
Feb 13
The Tesla Roadster—Not an Asteroid
Feb 8
Solar Section Looks Back to the Future
Dec 23
News Archives

Our Stellar Partners


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