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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ For the first time on the Mars, mini shakes were discovered science

For the first time on the Mars, mini shakes were discovered science



NASA's Navigation Mechanism InSight puts a shielded, dome-shaped shield over its seismometer.

JPL-Caltech / NASA

9459022). The instrument is designed to solve the mysteries of the planet's interior by detecting the bang thunder of marsquakes. But in just a few weeks, the car-sized cab has already heard something else: the minuscule tremors that are constantly shattering our red neighbor. If marsquakes are drum solos, these microseisms, as they are known, are the bass line.

The first signal became apparent at the beginning of February as soon as the groundmaker puts a protective shield over the seismometer, said Philip Lopnene, a planetary seismologist at the University of Paris, Didero, who heads the team that manages the instrument in a conversation today at the annual Moon Conference and the planet. "We believe these signals are waves coming from Mars." This is the first time he said that such microseisms were found on another planet.

On Earth, microseisms are ubiquitous, due largely to the spitting of oceans by storms and tides. Mars, despite the dreams of writers of science fiction, has no modern oceans. Instead, this newly discovered noise is probably caused by low-frequency waves of pressure from atmospheric winds that crack the surface, causing waves of longer wavelengths called relay waves even though InSight is not yet. Microseeds are an important indicator , that the earth's earth's index worked as he hoped. In recent decades seismologists have begun to see the microseism of the Earth not only as a nuisance but also as a valuable tool for understanding the peculiarities of the underground surface. This noise will be just as valuable on Mars, said Lognone, allowing the team's seismologists to explore the rigid surface crust in the immediate vicinity of the harbor.

But the pointer had a little time to listen. While the sand crawler in which the InSight landed, called "Homestead Hollow," there were not very large stones to complicate its placement, deployment still takes one month longer than planned due to two delicate tasks. First, the scientists had to carefully set the electrical rope connecting the sensor to the trigger to reduce the noise coming from the trigger. Then, they had to put a wind and a heat shield over the instrument

Since then, InSight spent most of its troubleshooting time on its second tool, a heat probe designed to dig up to 5 feet below the surface. The robot hand placed this tool in mid-February. Soon after the probe began to knock on the surface, the "mall", 40 centimeters long, stuck on a rock or some other plug just 30 centimeters down. Now the mission scientists are holding the knocking while waiting for the agency's engineers to assess their capabilities. It will last for several weeks, said Bruce Banner, chief research officer of InSight and geophysicist at NASA's JPL in Pasadena, California.

While microseasms are a thrill to hear, everyone who works with InSight awaits the main event: their first mars. You do not have to panic if you do not see it yet, "said Banner. "Before we get excited … [the mission is] just where we expected to be." The team expects to find about one marsak per month, but they are likely to come into clusters that are not perfectly distributed. Banner, who has been preparing this mission for decades, may be patient, he said. "Waiting is not over yet."


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