Online Courses Observing Manuals Variable Stars Videos


Community Driven Learning


Our goal at the AAVSO is to make variable star astronomy accessible to everyone whether you are interested in observing, research, or just learning why stars vary in the first place. We accomplish this by creating an community full of individuals that are able to help each other.  We facilitate this interaction in a wide variety of ways:

  • Forums  - If you have a question related to observing, instrumentation, or variable stars in general, the forum is the place to ask. The community is very responsive and very willing to help.

  • Mentors  - As long as you are a member in good standing, you can request more individualized attention through our mentorship program. 

  • Webinars - A new initiative at the AAVSO is hosting regular live webinars where you can learn more about a wide variety of topics. Even if you are unable to attend live, we have an archive of all recordings here that you can watch at your leisure.

  • Getting Involved - Our education model is only possible by the valuable efforts of people like you. We encourage you to help in whatever way is right for you. 


Online Resources

Over the years, we have published a large variety of content that will help you on your variable star journey no matter where you are at. 



  • 10 Star tutorial - Learn to observe variables stars, with no equipment necessary

  • Easy to Observe Stars - Continue your journey with interesting but manageable targets

  • Binocular Program - Increase your potential targets with just a pair of binoculars

  • Julian Date - Understanding the astronomical time standard 

  • CCD Observing - Using your CCD for science. 

  • More Resources - Want to learn more? This page is a link to everything a newcomer should need to get started

          Experienced Observers


   Research & Analysis