ISRO also said another instrument onboard the Rover confirmed the presence of Sulphur (S) in the region, through another technique. The Alpha Particle X-ray Spectroscope (APXS) has detected S, as well as other minor elements.

APXS instrument helps in-situ analysis of the elemental composition of soil and rocks on the surface of planetary bodies, like the Moon, which have little atmosphere. the instrument carries radioactive sources that emit alpha particles and X-rays onto the surface sample.

Physical Research Labortary, Ahmedabad, has developed APXS with support from PRL, Ahmedabad. URSC, Bengaluru has developed the deployment mechanism, ISRO shared.

“This finding by Ch-3 compels scientists to develop fresh explanations for the source of Sulphur (S) in the area: intrinsic?, volcanic?, meteoritic?,……?." the post by ISRO on the microblogging site said.

ISRO also shared a video which showed an automated hinge mechanism rotating the 18-cm tall APXS, aligning the detector head to be approximately 5 cm in proximity to moon’s surface.

Earlier the ISRO said the moon rover has found the presence of oxygen, aluminium, sulphur and other elements near the lunar south pole. It said that the investigation regarding the presence of hydrogen is underway.