Black and gold astronauts

The two Purdue University alumni who will soon be aboard the shuttle Endeavour are no strangers to outer space -- or each other.Space shuttle commander Mark Polansky and mission specialist David Wolf both graduated from the West Lafayette campus in 1978."Polansky knew (astronaut Greg) Harbaugh and Wolf as undergraduates," said John Norberg, a Purdue writer who has documented the school's history