Currently, Brainiacs has revealed how they have traveled the instruments on board the NASA Martian explorer Curiosity to measure changes in the gravity of the red planet above its surface.
"The curiosity basically has a new scientific instrument, six and a half years in his mission," said Kevin Lewis, lead author of a work published on the work and assistant professor at the Johns Hopkins University. "This allows us to obtain new information about the sub-surface of Mars so that the rover has never been designed."
A team of researchers from NASA's Air Propulsion Laboratory, John Hopkins University, the Carnegie Institution, the University of Maryland and the State University of Arizona, all in the USA, were responsible for calibrating the Accelerometers of Curiosity for gravimetry. The nuclear power rover has very sensitive accelerometers, and the mentioned boffins could reuse these to measure gravity on Mars.
As the rover climbed to Mount Sharp, a five-kilometer-high (approximately three mile high) training in the center of Gale's crater, the team measured the difference in gravity that goes to experiment in the way
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This allowed the researchers to measure the density of the rock below the Curiosity wheels. To his surprise, rock was less dense than I expected, according to rejigged sensors.
The data obtained before the Curiosity CheMin instrument, which analyzes the mineralogy of rock samples, associated the density of sedimentary rock at a density higher than the measurement of gravity readings. This suggested sedimentary rock was very porous.
This provides tips on how Mount Sharp was formed at Gale Crater. Some scientists believed that once it was filled with sedimentary rock that slowly eroded over time. However, being so porous, it now seems that it grew by accumulation of material over time.
"This study represents the first course of gravity and measurement of rock density in Mars. The low density of rocks at Gale Crater suggests that they were not subjected to deep burials," said Nicholas Schmerr, co-author of the document and professor assistant to the University of Maryland, Thursday.
"This could mean that Mount Sharp was not excavated due to erosion, but was built by wind deposition and other processes. In any way, it seems that Mars has had the ability to determine significant amounts of sedimentary rocks of low density that record a complex environmental history ". ®