Spectroscopy

Activities about Star Brightness/Spectroscopy: The PG-Liefering school in Salzburg got a spectrogaph to made spectra of stars. It’s a DADOS Spectrograph from BAADER. We made spectra of the sun, and stars like Sirius, Acturus, and other stars. Our telescope is a GPS-Celstron 9”. (Look at Website:

http://server-raum1. herzjesugym.at/Herbert/ Pluskurse/pluskurs2008/ spektroskopie2.htm http://server-raum1. herzjesugym.at/Herbert/ Pluskurse/pluskurs2008/ spektroskopie3.htm

For the project "Listen the stars" we will get spectra of a variable star. During the same time the other participants will get images of the same star to watch the brightness of the star(Lightcurve). So you can watch the changes of brightness and the changes in the spectra. In correlation of changes of brightness and spectra you can analyse the reason why this star changes the brightness.

If we make a spectrum of the brightest stars and look to the difference to our sun. Many stars with the same spectrum could be the sister or brother of our sun. It is very difficult to get the speed of the stars in relation to our sun by the Doppler-effect. But: If we measure the brightness of the star and its spectrum we can say how far the distance of the star is.