Starlink is under renewed fire from astronomers and environmentalists who claim the satellite network is flooding the night sky with unnatural light. With thousands of bright satellites already in ...

The speed of light is the fastest anything can travel. What happens to a photon from a galaxy 25 million light years away on ...

The best telescopes for kids that we recommend are not toys but usable instruments, based on how easy they are to use for ...

Play the USA TODAY Daily Crossword Puzzle. "I saw the hit," Carlisle said. "He had trouble sleeping the night of the game. He had trouble eating. Those aren't good signs. I don't know what his ...