Every year in (most of) the U.S., we move our clocks ahead one hour in the spring and one hour back in the fall. That time in between is called daylight saving time. (That’s right, drop that “s.”) As ...

The month is packed with skywatching highlights—including two galaxies visible to the naked eye and a rare glimpse of the innermost planet. A cormorant crosses the face of the full moon in ...