At http://phys.org/print329062105.html … ESAs Rosetta mission has found the comet is 'unusually' dark and there is no sign, as yet, of water ice. It's a lump of rock – apparently.
Rosetta Update
5 September 2014Astronomy
At http://phys.org/print329062105.html … ESAs Rosetta mission has found the comet is 'unusually' dark and there is no sign, as yet, of water ice. It's a lump of rock – apparently.