It's
incredible the number of open source products which could be used in
class. One of them is Stellarium. Students need to view and access
sources themselves. In this case stellarium proves to be a very good
product. Students may view stars at the comfort of their homes.
In technical words
it's a planetarium for your computer. It shows a realistic sky in 3D,
just like what you see with the naked eye, binoculars or a telescope.
It is being used in planetarium projectors. Just set your coordinates
and go.
You may download it
from here. If you want to
use it on your android mobile phone, download it from the google
store. Mac/Windows users download it from here.