The spring equinox, also known as the vernal equinox, marks the official start of the season, which happens on Thursday, ...

for both the vernal and autumnal equinoxes, creating what is known as "Chicagohenge." While the vernal equinox itself is just a brief moment, occurring at 4:01 a.m. on March 20, Chicago residents ...

The National Oceanic and Atmospheric Administration's GOES East satellite captured a view of Earth during vernal equinox in 2020.

Historical data shows that auroras occur more often during the spring and autumn equinox.

PAC’s astronomy season kicks off on Saturday, March 15, the date of the first public observing session at Niabi Zoo. Public ...

The arrival of autumn each year brings with it the start of many events on our annual food and wine calendar. The first (and for many, the most important!) is the grape crush from our local vineyards, ...

These days, the clocks we use most often (like those on our phones and computers) tend to automatically jump forward an hour in spring and fall back an hour in autumn. You probably barely give the ...

The spring equinox is one of those times ... Those are the months closest to the spring and autumn equinoxes — the time of year when the sun crosses the equator and delivers almost equal ...

The images below show the day-by-day phases of ... Harvest Moon: Occurring closest to the autumnal equinox, typically in September, the Harvest Moon is often renowned for a distinct orange tint ...

Here’s how it works. Space can be a wondrous place, and we've got the pictures to prove it! Take a look at our favorite space pictures here, and if you're wondering what happened to today in ...