Box office update 'Gravity' blasts off with $17.5 million Friday, could hit $50 million for the weekend

Warner Bros.’ $80 million thriller Gravity demonstrated some major pull on its opening day at the box office. The film, which stars Sandra Bullock and George Clooney as stranded astronauts, scored a tremendous $17.5 million on its first day, which puts the film on pace for a weekend in the $50 million range.
Gravity will almost certainly become the best opening weekend ever for both of its stars, surprassing Bullock’s $39 million start for The Heat earlier this year and Clooney’s $42.9 million...