Preparing for the Next Galactic Supernova
In this webinar, Prof. Dan Milisavljevic will discuss a coordinated global response to the next supernova in our Milky Way galaxy.
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https://us02web.zoom.us/webinar/register/3917366198825/WN_JPv2A2XlSbOsURv5Y2EgsA
Donate to the AAVSO!
Your support will provide opportunities that will influence generations of observers.
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https://www.aavso.org/annual-campaigns/2025-annual-campaign?utm_source=slider&utm_medium=web&utm_campaign=ac25&utm_content=hps241112
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
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https://www.aavso.org/blog/rw-cephei
Discover the AAVSO
An international community
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/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.
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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

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(VSX) Variable Star Index
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Pick a Star

Plot a light curve
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Membership and Support
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AAVSO at a Glance

Variable Star Observations in Database:

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

Last Observation Received:

4 min 9 sec ago by SASC - Andrey Semenyuta (KZ)

U Sge   Aug 21.7319   8.32Vis.

Plot U Sge light curve

Solar Section Looks Back to the Future
Dec 23
Winter 2024 Visual Observing Challenge
Dec 19
JAAVSO Volume 52 Number 2, 2024 is published
Dec 15
RW Cephei, a King of Kings
Dec 11
Board Election Results
Nov 19
News Archives

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