Experts say that the sky is falling, you just don't always get a chance to see it.

Margaret Campbell-Brown of The University of Western Ontario's Meteor Physics Group said Sunday's meteor that crashed somewhere near Cobourg, Ont. was likely about one metre in size, large enough to create a big hole in the ground if it landed intact.

Meteorites of this size hit the earth several times a week, says Campbell-Brown. "It not uncommon for these things to hit, what is less common is for them to hit during daytime and in populated areas," she said.

The Ontario meteor was about 1/20th the size of the rock that crashed in Chelyabinsk, Russia in Feb. 2103 that lit up the sky, damaged buildings and left a huge hole in the ice of Lake Chebarkul.

As for whether there's a "planet killer" meteorite heading our way, Campbell-Brown says we're safe, for now.

Watch the full interview above.

Earlier on HuffPost:

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  • Police dash cam of Meteor over Edmonton, Canada

    Meteor falling from the sky in Edmonton, Canada. Filmed about 5:30pm Thursday November 20th 2008.

  • Police dash cam of Meteor over Edmonton, Canada

    Police dash cam of Meteor over Edmonton, Canada. Filmed about 5:30pm Thursday November 20th 2008

  • Meteor Over Alberta, Canada The Great Daylight 1972 Fireball

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  • Meteor over Netherlands, pictures from Groningen, October 13, 2009. Photographer Robert Mikaelyan

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  • Meteor lights up night sky above Utah - Nov 2009

    A large ball of fire streaking across the night time skies just after midnight had many Utahn's wondering what they saw early Wednesday morning. Dozens of calls came with people wondering if they saw a shooting star, others wondered if it was the end of the world, military testing, or even a UFO. People from Mona to Spanish Fork from Ogden to Bountiful all calling in a very similar sighting More... To many, it looked like a large fall of fire, lightning up the sky, some say like daylight, others reported a blue like light that lasted for about 30 seconds. And many reported hearing a boom about 5 minutes later. Utah's NASA and Solar System Ambassador Patrick Wiggins said that it was a meteor also known as a bolide. From his observatory near Stansbury Park he says the break up of the meteor occured at about 240 to 250 degrees azimuth which puts it just north of southwest. He also heard the sound of an explosion that would put the breakup of the bolide about 100 km in that direction placing it high above Granite Peak in the west desert.

  • Perseid Meteor Shower - Friday the 13th

    Watching the yearly Perseid Meteor Shower from the 3rd floor of my hotel in Charlotte, NC. Behold amazing video footage of shooting stars and an occasional lulz! NEVER MISS A NEW VIDEO: Twitter: www.twitter.com Facebook: tiny.cc Dailybooth: dailybooth.com XBOX Live Gamertag: "ReallyRick"

  • April 2010 Meteor Fireball over Northern Iowa

    Howard County, Iowa Deputy Tim Beckman captures this video of a fireball streaking over the Iowa sky on Wednesday, April 15th, 2010