|Deutsch||Observation of Sun|
|Observation of sun
Looking back I still remember a fragmental solar eclipse, I watched at the age of four.
Today I know, in 1954 at 30th of June, the moon passed the sun at 14:00 o'clock. Observing in Germany, the sun was covered by the moon up to 93%.
In spite of such a coverage, you automatically close your eyes tightly, because an enormous luminous intensity is emitted by the sun.
Using a candle, my friends coated dark glasses with soot, in order to observe the solar eclipse. Sun observation is not possible with unprotected eyes and the soot-covered glasses are naturally no suited eye protection too. We need optical aids, if we want to increase knowledge about Sun.
What kind of aids do you need to observe the sun?
You should Visit an optician to procure a special eye protection, e.g. glasses made of foils, to observe a solar eclipse safely. If you want to look at details such as sunspots or even granules (convection cells of the sun matter), you need a telescope.
There are two types of telescope: The refractor built by lenses and the reflector, using mirrors. Generally the refractor is better suitable for the sun observation.
What can you observe at the sun?
You can differentiate 3 large ranges of sun observation:
I will limit here to the photosphere. For the two other ranges you need either special narrow-band filters or an observation point that has to be in between the shadow of a solar eclipse. A total solar eclipse arises occasionally, but however takes place at most different places of the earth. Often far journeys are necessary.
|Copyright by Hans Joachim Ilgen seit 1950|