The autumnal equinox in the Northern Hemisphere falls on Sunday, Sept. 22 this year. If you want to be extra specific and put it on your calendar, then mark it for 5:44 a.m. PT.

Thousands of solar tornadoes swirl above the sun’s surface at any given moment. These remarkable photos give us a glimpse at these stunning cosmic phenomena.

Milky Way viewing is at its best right now, especially if you’re in the southern hemisphere. Here's what to look out for, says Abigail Beall ...

From Stone Age astronomy to Viking law and Roman goddesses, cultures across time have honored the longest day of the year ...

Have you ever wondered what the Northern Lights look like from space? Recent footage from the International Space Station (ISS) has revealed all and it's a pretty incredible sight. The images show ...

For the Northern Hemisphere, this will appear in the top left. ... It looks like a half-moon. Waxing Gibbous - More than half is lit up, but it’s not quite full yet.

What does Milky Way galaxy look like when it’s visible from Earth? ... However, the best time to see the Milky Way in the Northern Hemisphere is from March to September.

What does a Harvest Moon look like? ... This week's partial lunar eclipse should be visible Tuesday night across the entire northern hemisphere, including North America.

When does winter start in 2024? Here's the science of the winter solstice, and why its the shortest day of the year in the Northern Hemisphere. When you purchase through links on our site, we may ...