We saw Donna and her gramps look on as the stars in the sky went out - lots and lots of stars going out.
But why is it that the stars are going out? As we have seen, the Daleks [so far] have only been responsible for stealing 27 planets. And we saw a whole sky full of stars going out.
Any thoughts on that? Think that it will be explained further? Or are we to just assume that the Daleks are out there just destroying planets and stars that they are not stealing.