The interior of the Sun does not rotate at the same rate at all latitudes. The physical origin of this differential rotation is not fully understood. It turns out, long-period solar oscillations ...

A red leaf spirals to the forest floor. Frost lingers on shaded green grass after sunrise. So it begins. Small changes soon add up to a brand new season, one that starts today Sept. 22 at 3:44 p.m.

The Sun crosses the Celestial Equator this week, but what exactly does that mean? This week, we finally see the end of Winter, as the Vernal Equinox arrives to kick off the new season of Spring for ...