Equinox shadows are unique. On this day - and only this day - the tip of an upright stick's shadow follows a straight path, west to east, all day long.
Did Earth have rings eons ago? A new study suggests that Earth had its own ring system 466 million years ago, which formed from the breakup of an asteroid.
The year's fastest sunsets are at the equinoxes, and the slowest are at the solstices. We're talking about how long it takes the sun to sink below the horizon.
The Super Harvest Moon on September 17, 2024, was briefly darkened by Earth's shadow in a partial lunar eclipse. Check out some great photos of the event here!
Want to do some cloudspotting on Mars? Researchers in Germany have created the new Cloud Atlas of Mars, with 20 years of images from the Mars Express orbiter.