Adler Astronomer Speaks on Russian Meteor - NBC Chicago

    Adler Astronomer Speaks on Russian Meteor

    Dr. Mark Hammergren says the meteorite that fell in Russia early Friday could have been 45 to 50 feet in diameter. Charlie Wojciechowski reports. (Published Friday, Feb 15, 2013) Dr. Mark Hammergren says the meteorite that fell in Russia early Friday could have been 45 to 50 feet in diameter. Charlie Wojciechowski reports. See More