Blast that comet

2019-03-07 08:20:01

NASA has given the go-ahead for a spacecraft to take a $279 million potshot at a comet. The Deep Impact craft will hurl a 350-kilogram lump of copper at comet Tempel 1 on 4 July 2005. Astronomers hope that the impact will teach them something about a comet’s innards, as the blast will expose and vaporise some of the interior ice. This will help them assess the prospects for diverting wayward comets that threaten the Earth,