Arcturus - Dying star & the mirror

[dream_catcher3010]

No: HPFGUIDX 148665

Hi everyone, 

I was talking to my sister last night and she mentioned that Arcturus 
is a red giant. Now, we know that a lot of the Blacks are named for 
stars but do you think it has any significance that this is a star 
that is about to die? I don't know what I think about it yet but it 
struck me as very interesting, and I'd love to hear peoples thoughts 
on the subject.

Also, has anyone got any thoughts on where the other half of the two-
way mirror is now? Did Sirius have it with him? What role do you think 
this will play in the next book?

Rachel