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New explorers are welcome.
YOU can be an astronomer.

https://www.youtube.com/watch?v=tgCB2lBRk8s&t=5s

AAVSO 2021 online events

Sign up for any to all of these webinars and how-to hours!

Sponsorship opportunities for this year-long series are available!

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Please donate!

We have new goals to help you & the scientific community!

Please donate to our Annual Campaign today!

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New for you: monthly variable star episodes!

Each variable star and corresponding episode, complete with observing tips for the beginner who has never found a star or calculated its brightness, is brought to you by a collaboration of the AAVSO, Charles W. Brown Planetarium at Ball State University, and the International Planetarium Society.

Check out this month's star to observe!

https://www.aavso.org/featured-variables

The mission of the AAVSO is to enable anyone, anywhere to participate in scientific discovery through variable star astronomy.

Resources

(VSX) Variable Star Index

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The Journal of the AAVSO

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Submit and Access Data

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Tools and Observer Resources

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Observing Sections

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Education

CHOICE Courses, Manuals, Videos

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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:

4 3 , 7 4 6 , 6 8 7 and Counting ...

Last Observation Received:

2 min 38 sec ago by BDG - David Boyd (GB)

EE CEP Jan 15.7789 10.190I

Plot EE CEP light curve

JAAVSO Vol 48 No 2 print version available

Jan 14

Schedule

Jan 14

Schedule

Jan 14

Schedule

Jan 14

Sequence Team Homepage

Jan 13

News Archives

Our Stellar Partners

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Resources

Pick a Star

AAVSO at a Glance

Variable Star Observations in Database:

Last Observation Received:

Our Stellar Partners