Weather permitting, tens of millions who live along a narrow stretch from Mexico’s Pacific coast to eastern Canada can just look skyward Monday to glimpse the total solar eclipse, as day turns to ...

Here’s a little astronomical riddle for you: Which star in the late-autumn sky winks at us once every 2 days, 20 hours, and 49 minutes? Each wink lasts about 10 hours. If you identified the mystery ...

Looking directly at the sun, even for a few seconds, can basically create the equivalent of a burn on the retina, and it doesn’t matter how much of the sun is visible. “And when the sun is even ...