Halloween Asteroid: Largest to pass Earth until 2027

http://earthsky.org/space/big-asteroid-will-safely-pass-earth-on-halloween-october-31-2015?utm_source=EarthSky+News&utm_campaign=c0f83d6cdf-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-c0f83d6cdf-394355213

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