DULUTH — We woke up to winter, and now it's spring. Funny how astronomical events can turn on a dime. The new season began at 10:33 a.m. CDT Sunday when the center of the sun crossed the celestial ...

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 ...

The equatorial coordinate system projects Earth's latitude and longitude onto the celestial sphere, using declination (angular distance from the celestial equator, measured in degrees) and right ...

The summer's been so hot it's hard to imagine that fall has arrived. But celestial bodies don't look at thermometers. They move on. And that's why we're headed for frosty mornings, like it or not. For ...

Birds are chirping, the skies are clear, and that can only mean one thing ― spring is near. The first day of spring, also known as the vernal equinox, is fast approaching in the Northern Hemisphere.

As the weather gets warmer and clearer skies return, make plans to stargaze over the next several months. Whether you are staying at home or heading out on vacation, your latitude location will play a ...

The comet is almost at its closest approach to Earth on July 14. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A megacomet glows in the dark in ...

After another long winter, we could all use some spring. Yes, winter sports are great, but many of us are ready to turn the page. It’s time for spring 2023 to begin, at least astronomically, and it ...

STATEN ISLAND, N.Y. -- Take out your sweaters and boots and put away your warm-weather clothing, as Thursday marks the first day of fall. The autumn equinox takes place when the sun crosses the ...

Today, I want to talk about the equatorial coordinate system. Start with this: What if we could project Earth's coordinates of longitude and latitude into the sky? Latitude wouldn't be a problem, but ...