MIDAS dust particles A, B and C from comet 67P/C-G
Atomic force microscope topographic images of MIDAS particles A, B, and C. (a) Overview image with a pixel resolution of 312 nm and a colour scale representing height. (b) Sub-units (grains) of the individual particles detected at the resolution of the instrument are outlined. (c) 3D images of particles A and C with two times height exaggeration to aid visualisation. Particles A and C comprise tightly packed 'compact' grains, while B appears to be a single grain.