Meteorological summer began on Sept. 1, but astronomical autumn is Sept. 22 at 8:44 a.m., what we call the autumnal equinox.

On Sept. 22, the fall equinox formally heralds in autumn and marks the end of summer in the Northern Hemisphere.

Fall equinox 2024 arrives on Sunday2. Find out why the first day of autumn still features a little more daylight than ...

Sept. 22, day and night will be nearly equal in length as Earth spins side-on to the sun and autumn officially begins in the ...

The autumn equinox, which comes around every September for the Northern Hemisphere, marks the official astronomical start of ...

Autumn officially begins 8:43 a.m. Sunday in Ohio, according to timeanddate.com. That's the exact moment of this year's ...

During summer, the Earth's axis is tilted toward the sun, resulting in longer days and more exposure to the sun's warming ...

As the Earth travels around the sun ... When the Northern Hemisphere is tilted toward the sun, that's called the summer ...

As the transition from summer to fall begins, the sun's angle starts to change as well, impacting everything from temperature to even your health.

The Earth’s atmosphere shields us from most Ultraviolet B ... highest during summer when the sun is high in the sky and there ...

But when Eratosthenes erected a pole in Alexandria and observed it on the summer solstice, the pole cast a shadow—meaning the sun was not directly overhead. Eratosthenes thought this must be because ...

Fall kicks-in on Sunday Sept. 22. “Autumn” is the season of the year that is the transition period from summer to winter, ...