Two comets will brush by the Earth early this week, with one coming closer to our planet than any has in 246 years.
The first, called Comet 252P/LINEAR and covered by emerald-green gas, will pass at 8:14 a.m. Monday (Eastern Daylight Time).
It will be followed a day later by a similarly colored comet, called Comet 2016 BA14, around 10:30 a.m. EST.
It is expected to come within 2.2 million miles of Earth -- almost 10 times farther from the Earth than the moon -- making it the closest comet to brush by Earth since 1770.
It may be visible under clear skies with binoculars, experts say.
Click here to sign up for Daily Voice's free daily emails and news alerts.