#insight lander

A team of planetary scientists from Belgium, the U.S., France and Germany has found evidence from the InSight lander that suggests Mars has an all-liquid core and internal mass anomalies. In their paper published in the journal Nature, the group describes their analysis of data sent back to Earth from the lander. As the research team notes, determining the interior characteristics of the solar system's planets is hindered by their inaccessibility. In this instance, they were referring to work by research teams attempting to determine the inner makeup of Mars. To date, no one has been able to show whether its core is solid or liquid, for example—a characteristic that could impact work exploring whether the planet ever harbored life. In this new effort, the researchers focused their efforts on data from the InSight lander, which landed on Mars in 2018... The researchers found evidence in RISE DATA of what they describe as "mass anomalies" beneath the surface of the planet. The anomalies were found to stretch from the top of the mantel to the bottom. They further note that Mars' gravity field and likely its overall shape is mainly determined by the rotation rate of the planet. But they suggest that the anomalies may have an impact, as well. More importantly, by studying data related to the core and characterizing it separately from data related to the mantle, the team found what they believe to be evidence showing that Mars' core is molten liquid—and they also found a slight increase in the planet's spin.

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THE INSIGHT LANDER IS RUNNING OUT OF POWER

Let’s get ready to rumble! NASA appears to have just captured the first recording of a quake on Mars. On April 6, the seismometer on the Mars InSight lander recorded a short series of howls, grumbles and pings. One of those sounds — that grumble — is raising suspicions. It’s the first recorded sound from the Red Planet’s interior, and scientists say it’s likely a long-sought quake. NASA released the 40-second recording on April 23, 2019. It begins with a faint, eerie howling of the Martian wind. Next comes the low rumble of the possible Marsquake. A large ping toward the end is the spacecraft’s robotic arm moving.

Explainer: Seismic waves come in different ‘flavors’

InSight landed on Mars in November 2018. Its mission is to probe the Red Planet’s interior. InSight does this by tracking seismic waves rippling through the ground. Mars lacks Earth’s powerful quakes, which are caused by shifting tectonic plates. But as the planet cools and contracts, it has smaller quakes, crackles and rumbles. Scientists hope that InSight’s data will reveal Mars’ internal structure. That includes the size and density of its crust, mantle and core. Some of these data also might detail how heat flows through the planet’s insides as well as uncover hints of water there. This new recording isn’t long enough to provide much insight about the Martian interior, scientists say. But it shows Mars is seismically active. It also kicks off a brand-new field of research: Martian seismology.