There’ll be a celestial show tonight with a stadium-sized asteroid fly-by, a Harvest full supermoon and partial lunar eclipse. Here's how to see it.

A partial lunar eclipse happens when the Earth passes between the sun and moon, casting a shadow that darkens a sliver of the moon and appears to take a bite out of it. Since the moon will inch closer to Earth than usual, it’ll appear a bit larger in the sky. The supermoon is one of three remaining this year.

Mainers can expect a vivid scene in the Tuesday night sky when a supermoon coincides with a partial lunar eclipse. NASA predicts that the full moon will be partially covered by Earth’s shadow for several hours Tuesday night.