An asteroid nearly the size of a skyscraper will whiz between the Earth and the moon on Saturday in a once-in-a-decade event

• A large asteroid is set to pass by the Earth on Saturday in a once-in-a-decade event.
• The asteroid will pass between Earth and the moon's orbit, bringing it relatively close.
• It may be visible to some in the Northern hemisphere and could look like a "slow-moving star."

A large asteroid is set to zoom past the Earth on Saturday at an unusually close distance, putting it closer to the planet than the moon.