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