When a meteor flashes across the night sky, it’s more than a beautiful streak of light. It’s a delivery from deep space—an ...

A timeline of the solar system etched into a concrete sidewalk. Included are drawings of the planets depicting their positions; the traveling time of sunlight to the planets and the revolutions of the ...

Solar flares and other activity can disrupt radio communications, power grids and navigation signals, according to NASA.

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...