Sagittarius A* has been seen by human eyes with an "image produced by a global research team called the Event Horizon ...
The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to get the best view before they disappear.
It has been less than a year since the total solar eclipse crossed western New York, and we have a long wait for the next one in the U.S. in ...