Skip to main content

Support the AAVSO


From our Leadership

President's letter December, 2019

2020 AAVSO online CHOICE courses


AAVSO Selected to Participate in Harvard Business School Association of Boston’s Community Action Partners Program

Are you an undergrad or grad student? Volunteer as an AAVSO Ambassador!

Increase Astronomical Discoveries by Storing Your Spectroscopic Observations with AVSpec

A new database created by AAVSO enables amateur to experienced observers to record data from any variable object in the sky

Pick a Star

Type star name then click action.
Recent Activity

Variable Star Observations in Database:

40,394,367 and Counting ...
Last Observation Received:

35 min 50 sec ago by POX - Michael Poxon (GB)

UX ORI   Jan 18.9063   10.6Vis.   

Plot UX ORI light curve


We gratefully acknowledge support from the Friends of the AAVSO:


AAVSO is an equal opportunity and discrimination/harassment-free environment. Please read our policies here.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484