The sun's drop across the equator is due to a 23.5° tilt in Earth's rotational axis, which shifts our star's apparent path in the sky as our planet goes about its yearly orbit. We experience two ...

Here's what happens as the direct rays of the sun slip south of the equator as the seasons change.

Here's what you need to know to make the most of the partial solar eclipse on Sept. 21, as the moon takes a 'bite' out of the ...

The autumn equinox is now upon us! Today marks the moment that the sun crosses the celestial equator, ushering in the beginning of astronomical autumn in the northern hemisphere, which brings with it ...