Apple iPhone's question answering service, 4 letters
iPhone 4S program that recognizes voice commands, 4 letters
Shit That ___ Says (tumblr about a piece of iPhone software), 4 letters
Talking iPhone feature, 4 letters
Watergate judge John, 6 letters
Hombre who acts like a stud?, 11 letters
Subatomic scientist/mathematician?, 15 letters
Big name in satellite radio, 6 letters
Bright spot in Canis Major, 6 letters
Brightest star in the sky, 6 letters
Dog in the heavens isn't funny, 6 letters
Harry Potter's godfather ___ Black, 6 letters
Night's brightest star, 6 letters
Part of Canis Major, 6 letters
Satellite radio company, 6 letters
Satellite radio giant, 6 letters
Star in Canis Major, 6 letters
Star in the Greater Dog, 6 letters
The brightest star in the heavens, 6 letters
XM Radio alternative, 6 letters
The brightest star in the sky, 6 letters
Harry Potter's godfather, 11 letters
Sudden prostration due to exposure to the sun or excessive heat, 8 letters