Planetary Defence System To Be Tested

from The Daily Mail 30-metre asteroid skimming past Earth in October will test Nasa’s doomsday ‘planetary defence system’ On October 12, the 2012 TC4 asteroid will be just 4,200 miles (6,800 kilometres) from Earth for the first time since it went out of range in 2012. Nasa is using the opportunity to test its ‘planetary […]