The moon slipped between the Earth and the sun on Saturday, casting a shadow on our planet in parts of the United States, Canada, the Caribbean, Europe, Russia and Africa.

During a partial solar eclipse, the moon passes between the sun and Earth. The moon casts a shadow on Earth and only partly blocks the sun, making it appear like a crescent. Unlike a total solar eclipse, there’s no totality so experts say proper eye protection must be worn the whole time.

A partial solar eclipse occurs when the moon passes between Earth and the sun but only partially covers the sun's disk. Unlike in a total solar eclipse, the moon didn't completely block out the sun this time, so observers needed equipment such as eclipse glasses or pinhole cameras to view the sun safely.