Star explodes halfway across universe

A star 7.5 billion light years away exploded, giving off
the brightest gamma-ray burst afterglow ever seen.

WASHINGTON (AP) -- The explosion of a star halfway across the universe was so huge it set a record for the most distant object that could be seen on Earth by the naked eye.

The aging star, in a previously unknown galaxy, exploded in a gamma ray burst 7.5 billion light years away, its light finally reaching Earth early Wednesday. full story