The Calcium Filtered Sun

Calcium K
Helium 1
Soft X-ray
No Filter

This image of the Sun was taken through a filter that only transmits light with a wavelength of 393.4 nanometers. The image was taken by a telescope at the National Solar Observatory, Sacramento Peak in Sunspot, New Mexico. The blue light is emmited by once ionized Calcium atoms. This filter shows us a region of the Sun called the chromosphere, it is approximately 2000 km higher than the photosphere.

This image allows us to see some of the magnetic structure on the Sun. The bright sections show where the magnetic field is the strongest.

So you see any correlations between this image and the other solar images?

When you have viewed all the images of the Sun let's discuss what we have seen.

The Filtered Sun Filters Lesson The Helium Filtered Sun