The AAVSO blog features astronomical stories of particular interest to variable star aficionados. Blog posts might cover breaking news, historical anniversaries, internal project updates, and other subjects germane to our membership. Feedback is welcome: write to our organization's inbox to have your say!


Sun, Meet Moon

April 5, 2024 | By Tim Lyster

This month's total eclipse will be visible for millions of people.


Update on SNEWS Campaign

March 21, 2024 | By Tim Lyster

There are still stars to be claimed in this important citizen science project.


Star Light, Star Bright

December 19, 2023 | By Tim Lyster & George Silvis

How backyard observers can help unlock the secrets of supernovae.


Cleaning Up VSD

November 16, 2023 | By Sebastián Otero & Tim Lyster

Inconsistencies in the WBVR catalog magnitudes adopted in the Variable Star Database were causing issues for our observers. A major clean-up was in order.


Shattering Shapley’s Universe

October 6, 2023 | By Tim Lyster

A century ago, Edwin Hubble’s photographic observations of a Cepheid variable settled the vexing question of the day: Our Milky Way is not the entire universe.