The researchers found that the main density is surprisingly low, at just 6 grams per cubic centimeter, which is lower than they expected for an iron-rich center. “It’s still a mystery how much light the main part is,” says Stuhler. There must be lighter elements, although it is unclear what that might be. He and his team hope to eventually find the P-waves generated by Mark Akek, who originated directly on Earth from where Insight has been parked. Because they can pierce through the core-mantle boundary, they will carry information about the composition of the core to the receiver of the lender. But for that to happen, Stähler says, “Mars will give this earthquake on the other side of the planet.

In Stähler’s team’s paper, they report a major radius of 1,830 kilometers. Another team led by ETH Zurich geologist Amir Khan discovered that the size was so large that it left little room for an Earth-like lower mantle, a layer that acts as a blanket to trap heat around the core. The Earth’s mantle is divided into two parts, with a so-called transition zone in between; The upper and lower layers are made up of different minerals. “Mars is the mantle – I can honestly say – the simplest version of the Earth’s mantle, in terms of mineralogy,” says Khan, the lead author of the paper describing the mantle.

Previous estimates of the radius of the core using geochemical and geographic data indicated the absence of a lower mantle, but scientists needed Insight’s seismological readings to confirm it. Without this layer, Mars probably cools more easily than Earth. This is the key to understanding the evolution of the Red Planet, and in particular why it lost its magnetic field, an obstacle that would have protected the atmosphere – and potentially life – from harsh solar winds. Creating a magnetic field requires a temperature gradient between the outer and inner cores, sufficient to create rotating currents that churn the fluid at the core and stimulate the magnetic field. But the main cooled so quickly that these convection currents died.

Khan’s analysis also shows that Mars has a thick lithosphere, the hardest and coldest part of the mantle. This could be a clue as to why the Red Planet does not have the plate tectonics that drive volcanic eruptions on Earth. “If you have a very thick lithosphere, it’s very difficult to break this thing down and build a precise equivalent of plate tectonics on Earth,” says Khan. “Maybe it started too early on Tuesday, but now it’s definitely off.”

Insight eavesdrops on the internal vibrations of Mars while, in search of signs of ancient life in the rocks of the continent, finding places to collect regolith specimens, and learning about the geological history of Jezero, its dusty surface is rotating. “Exploration is not a sprint, it’s a marathon,” said Thomas Zurbuchen, NASA’s associate administrator of science, who opened a press conference Wednesday to highlight the first few months of rover development in his new home. “Mars research is a step in the long legacy of carefully planned Mars research that combines robotic and human research for the time to come.”

The scientists at the press briefing said what has been the perseverance in his road trip so far. “The challenge is exactly where we’re going and how we’re going to fit everything into our schedule,” said Vivian Sun, a system engineer at NASA’s Jet Propulsion Laboratory. Sun said they decided to orbit Drata about 3,000 feet south of its landing site to pick up its first rock samples, which would be stored in the rover’s belly and then cached for future return missions to the planet’s surface that would take them to Earth. .