Do you know that there's a planetarium in Schwaz and Tyrol? ?
Yes, only in 1,5 hours drive from Bad Reichenhall, not far from the castle Trazberg, in the city Schwaz there's a small planetarium. Address of the parking: Alte Landstraße 15, 6130 Schwaz, Austria attention! You should use highways of Austria to drive , do not forget to buy a vignette).
Cost: 11,50 euros for adults, students 10,00 euros, children under 14 years-9,00 euros, there are family tickets. The program is rather different: stories about Solar system, the story about the Bethlehem star, planet to the touch and others...
Visit this attraction or not is your choice. If you have been to big planetariums so you would not learn something new, besides the narration is in German and with terminology in German too what makes it difficult to perceive. Actually if you are not good with German you can watch for the interest how they show stars. And if you are near and the weather is rainy it is a good place to spend time.