
Subscribe Today Renew Give a Gift Archives Customer Service Facebook Twitter Newsletter SEARCH Health Medicine Mind Brain Technology Space Human Origins Living World Environment Physics Math Video Photos Podcast RSS Natural born scientist The secret of nym Near-Earth asteroid twice as big as previously thought On June 14, 2012, the asteroid 2012 LZ1 passed the Earth . It missed us by a wide margin over 5 million kilometers 3 million miles so there was no danger of impact . While it does get near us every now and again , using current orbital measurements we know we’re safe from an impact by this particular rock for at least 750 years . . Phew Good thing , too . New observations using the Arecibo radio telescope in Puerto Rico indicate LZ1 is bigger than we first thought . Much bigger :