Those may have been from
urine ice particles flushed from Endeavour that rained on the spacecraft, an analysis published in 2000 in Advances in Space Research suggested.
Not exact matches
Urine that it vented also left a residue when tiny
particles hit the craft's panels, so Lorenz suggests that future missions to Enceladus could look for signatures of life if similar residue is found in the minuscule dents left on a detector by
ice grains from the plumes.
The detailed analysis of the spectra suggests that Sromovsky's team has observed
ice particles, made of a mixture of water and ammonia (which gives
urine its smell).