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. Solar eclipse maps show crisp ...

Millions of Americans may have the chance to witness a partial solar eclipse on March 29, when the moon passes between the Earth and the sun, temporarily obscuring part of the solar disk. While not as ...

This story was updated to add new information. Spring has sprung, bringing warmer days and blooming flowers. Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere.