The sun has been alive with a flurry of activity over the past few days and that means that there's the increased chance we may see the northern lights Wednesday night.
A new study indicates that when the dinosaur-killing asteroid struck with Earth 66 million years ago, vast amounts of sulfur were hurled into the stratosphere volumes far greater than previously imagined.
CAPE CANAVERAL, Fla. (AP) NASA aced the most complicated, critical job on its newly launched space telescope Tuesday: unrolling and stretching a sunshade the size of a tennis court.