Donations help us maintain our open-source databases and free education. Please donate to AAVSO’s Annual Campaign Today!
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Interested? Please click here!
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and a note from the AAVSO President
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https://www.aavso.org/presidents-message-december-2021-0
January's featured variable episode: Pleione
Interactive 360 video | Versions for planetariums | Tips for the beginner
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/featured-variables
Welcome to the AAVSO!
New explorers are welcome.
YOU can be an astronomer.
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https://www.youtube.com/watch?v=tgCB2lBRk8s&t=5s

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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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The Journal of the AAVSO
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Data
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Tools and Observer Resources
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Observing Sections
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Education
Education
CHOICE Courses, Manuals, Videos
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AAVSO In Press
AAVSO In Press
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Membership and Support
Membership and Support
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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:

5 0 , 7 1 8 , 9 5 0 and Counting ...

Last Observation Received:

3 min 36 sec ago by ATE - Teofilo Arranz (ES)

V740 PER   Jan 16.9439   11.098V

Plot V740 PER light curve

Alert Notice 766: V1204 Tau observations needed now for HST coverage
Jan 14
Alert Notice 765: GP Com HST schedule moved forward
Jan 13
2022-how-to-hours
Jan 11
AAVSO Board Officers and Members - John Blackwell
Jan 11
AAVSO 2022 webinar discussions
Jan 4
News Archives

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