Using spacecrafts' orbital irregularities to "see" beyond the surface of Mars. A new map of Mars' gravity made with three NASA spacecraft is the most detailed to date, providing a revealing glimpse into the hidden interior of the Red Planet. "Gravity maps allow us to see inside a planet, just as a doctor uses an X-ray to see inside a patient," said Antonio Genova of the Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts. "The new gravity map will be helpful for future Mars exp

From Moon buggy to Mars rover Scientists repurposed sensors on @MarsCuriosity to measure a Martian mountain’s gravity. It’s similar to an experiment Apollo 17 astronauts conducted on the Moon. https://go.nasa.gov/2Tnqqwb | NASA Jet Propulsion Laboratory