19th-century mathematics is giving way to 3D, high-resolution, real-topography models that could provide a more precise path of totality for the next total solar eclipse. When you purchase through ...

A total solar eclipse will cross North America on Monday, offering millions a rare opportunity to see afternoon skies temporarily darken as the moon blocks the face of the sun. Tune into NBC News NOW ...

On Monday, a total solar eclipse will cross North America – a phenomenon that has not taken place in the United States in seven years, and astronomers say will not take place again in the U.S. for ...