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/
Thank you for your support!
Your generous donations helped us reach—and exceed—our Annual Campaign goal.
Slider Link
https://www.aavso.org/donate-now?utm_source=slider&utm_medium=web&utm_campaign=ac25
Deciphering Eclipsing Binary Systems
Join Dr. Pierre Maxted for a presentation on ESA’s PLATO mission to study terrestrial exoplanets.
Slider Link
https://us02web.zoom.us/webinar/register/8817374773923/WN__1iX3a3URi-ry9MneK7lfw
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/
Thank you for your support!
Your generous donations helped us reach—and exceed—our Annual Campaign goal.
Slider Link
https://www.aavso.org/donate-now?utm_source=slider&utm_medium=web&utm_campaign=ac25
Deciphering Eclipsing Binary Systems
Join Dr. Pierre Maxted for a presentation on ESA’s PLATO mission to study terrestrial exoplanets.
Slider Link
https://us02web.zoom.us/webinar/register/8817374773923/WN__1iX3a3URi-ry9MneK7lfw
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

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(VSX) Variable Star Index
/vsx

Pick a Star

Plot a light curve
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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 6 , 9 0 6 , 1 2 4 and Counting ...

Last Observation Received:

14 min 46 sec ago by JDOC - Douglas James ()

QATAR-9   Mar 3.2741   13.7558V

Plot QATAR-9 light curve

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
Winter 2024 Visual Observing Challenge
Dec 19
News Archives

Our Stellar Partners


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