NASA news: New Horizons closes in on asteroid more than FOUR BILLION miles from Earth NASA’S New Horizons space craft is embarking on its most ambitious missions to date as it closes in on an icy asteroid more than 4 BILLION miles from Earth. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Take a Number: Cancer Deaths Continue a Steep DeclineTrilobites: A Mummified Child’s Remains Show Signs of a Modern ScourgeVolcano WARNING: These are the six terrifying volcanos which could BLOW in 2018John Young, Who Led First Space Shuttle Mission, Dies at 87Expect Environmental Battles to Be ‘Even More Significant’ in 2018LIFE ON MARS: NASA rover finds 'unique fossils' on Red Planet