We are excited to announce the launch of our new forums! You can access it forums.aavso.org. For questions, please see our blog post. The forums at aavso.org/forum have become read-only.
Announcement: New Applications
The existing WebObs will soon be replaced by WebObs 2.0! Please use this application to submit future observations: Submit Photometric Observations
Above: Discovered on May 19, 2023 by Japanese astronomer Koichi Itagaki, SN 2023ixf (the bright star at lower left) lies 21 million light-years away in the Pinwheel Galaxy.
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. | By Sebastián Otero & Tim Lyster
Exactly a century ago, on the night of October 5/6, 1923, Edwin Hubble’s photographic observations of a Cepheid variable settled the vexing question of the day: Our Milky Way is not the entire universe.