Seven planets are expected to be seen in the Earth's night sky on Friday, astronomers said. Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune will be visible from Earth with the naked eye. Experts said,

Though the alignment isn't once-in-a-lifetime rare, the seven other planets in our solar system don't align every year, so it can be a spectacle to witness.Start the day smarter. Get all the news you need in your inbox each morning.

Beginning around sunset, Saturn will be situated closest to the horizon, followed by Mercury, Venus, Jupiter and Mars higher in the sky. While Neptune and Uranus also are within Earth’s line of sight, they’ll require binoculars or a telescope and are extremely difficult to locate, astronomers say.