Not a new album, or a treatise on cosmic dust, but a book of restored 3-D viewcards. Apparently Brian has been collecting them for years, and he got together with a photo historian to restore the work of a stereo photographer from the 1850s.
NYT article: A Village Preserved, Green and All: Brian May’s Photographic Recovery
Web page for the book: A Village Lost And Found
Being a collector of viewcards myself, I must say that this is really cool!
He had a great interview on “Fresh Air” yesterday. The Queen stuff was fun, but the best part was when they were discussing his thesis for his PhD in Astrophysics that he earned (on the side). 
I heard him on ‘Q’ last week and found him to be very interesting. I want to see the book since I have a Holmes Stereoscope and numerous cards for it…
I ordered a copy of the book a few days ago and am really looking forward to reading/seeing it. Brian May is an interesting fellow, definitely fits the definition of a renaissance man.