"We have had very detailed mapping of that basin from images, from orbital spectral data, but we have not had high-resolution of its interior structure, " Grail's chief scientist, Prof Maria Zuber, who has been speaking at the Lunar and Planetary Science Conference (LPSC) in The Woodlands, Texas, told BBC News.

BBC: Nasa reveals new information about moon probes crash sites

That energy depletion would have resulted in a spectral distortion detectable by OPERA. However, the OPERA data did not show either the energy depletion or the spectral shift.

FORBES: More Evidence Against Faster Than Light Neutrinos

Now that this data has been collected, it can be analysed and compared with the known spectral signatures of materials likely to be found in comets.

BBC: Q&A: Deep Impact comet mission