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Solar Observing Guide in German

Thanks to an excellent volunteer effort by Ilka Petermann, the AAVSO's Solar Observing Guide is now available in German.

Click here to get to download (free-of-charge)

If you would like to translate the Guide into your native language, please contact Sara at AAVSO HQ. In addition to this new German version, we also have a French translation and Italian and Spanish versions are in progress.

Sunny skies!

SID Database

About the SID database

The Sudden Ionospheric Disturbance (SID) Database lists all events identified in the AAVSO Solar Bulletin. These results are provided monthly by the worldwide network of SID observers in the AAVSO Solar Division. Individual results are correlated with other observers' reports and reduced to a list of events with high definiteness ratings.

Solar Observing Guide

The AAVSO Solar Observing Guide

Download Version 1.1 - October 2017 (2.2 MB)
 

(There is a translation of this manual into French and German available below.)

Introducing... The AAVSO Solar Observing Guide

Thanks to a lot of hard work on the part of long-time sunspot observer Frank Dempsey and his team, the AAVSO is proud to announce the publication of a brand new observing manual designed to help introduce observers to the art and science of solar observing.

The AAVSO Solar Observing Guide

Click the link above to read more and download your copy - free of charge.

 

 

What are sunspots?

The term "sunspot" appears in the news, often in connection with stories on aurorae, electrical outages, and problems with orbiting satellites.  But often these stories don't really explain what sunspots are and why they're of interest to us on Earth.  So what are sunspots?

Accuracy and Consistency in the Production of the American Sunspot Number (Ra)

Addendum

ACCURACY AND CONSISTENCY IN THE PRODUCTION OF THE AMERICAN SUNSPOT NUMBER (Ra)

Contributed by Carl E. Feehrer (FEEC)

Solar Photo Gallery

Here are a number of solar photographs obtained by AAVSO solar observers over many years.  Thanks to all of the photographers for sharing their images with us!

 

 

Atmospheric seeing conditions for solar observing

Atmospheric Seeing Conditions

Contributed by Tom Fleming (FLET)

Reports and observations submitted to the AAVSO use the following ratings for atmospheric turbulence (Seeing): Poor, Fair, Good and Excellent.

Solar Section

 

Welcome to the web pages of the AAVSO Solar Section, a world-wide group of observers dedicated to observing the closest variable star in the sky -- our own Sun! On these web pages, you'll find information on who we are, what we do, and how we contribute to the scientific study of the closest star in our sky.

 

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