Our Sun - September 13, 2005.

The huge Sunspot Group - 798/808 - is clearly visible - this complex area has given rise to several impressive auroras - also in Denmark.

A circle illustrating the size of planet Earth is shown for comparison (lower right).

Photo by Lykke Jensen, Søren Bønløkke, Signe G.Lorentsen, Søren Nissen, Frida S. Jepsen and Rasmus V. Gade.

Data : 13-09-2005 09:19:57 - shutter speed 1/500 sec - ISO 400 - at f = 1140 mm.

Copyfree provided this source - "The observatory at EUC Syd and AGS" - is mentioned.

Concerning auroras - we were so far clouded out - on Sept. 12-13 , we could even see the bright northern sky right at the horizon. Click to see wmw movie.

However, better luck next time - here are our photos from Aug 31 - as well as from previous occasions.

Send an email to our astronomy students

A few useful hints concerning how to hunt auroras on your own :

Spaceweather - very informative

Norwegian Real Time Magnetometers - look for heavy oscillations

NOAA Solar Activity - general forecast

Visible Aurora Estimate - look for red areas

Spaceweather NOW - Look for NEGATIVE B_z values - indicating auroras moving South

Spaceweather activity, as measured in Space - look for K values above 6-7

Russian Magnetometer - look for K values above 6-7

Aurora Webcamera Finland - look at the last figure.

Aurora Forecast for your position

Email based Aurora Alerts - very useful

The Moon -

a snapshot at Sep 12 - cloudy..

a snapshot at Sep 13 - clear sky..