The autumnal equinox this year is at 7:03 p.m. Sept. 22. We typically think of the first day of fall as something that happens all day long, but the equinox is the time when the sun crosses the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Did you know that it’s not always the case ...

Most people were taught some variation of the classic rhyme: "Thirty days hath September,April, June and November,All the rest have thirty-one,Save February at twenty-eight." But there are two other ...

When you think about astrology—i.e., when you put your sun, moon, and rising in your Instagram bio, or look up your daily horoscope online—you’re likely thinking about tropical astrology. Yes, you ...

The sidereal year The “sidereal year” is the classic classroom definition. It’s the time it takes Earth to complete one lap of the Sun and return to exactly the same place in its orbit, judged by the ...