February 21, 2019
વિદ્યા રિયલ લાઇફમાં પણ રેડિયો જોકી
NASA’s new Mars lander has captured the first sounds of the “really unworldly” Martian wind. The Jet Propulsion Laboratory released audio clips of the alien wind Friday. The low-frequency rumblings were collected by the InSight lander during its first week of operations at Mars. The wind is estimated to be blowing 10 mph to 15 mph (16 kph to 24 kph). These are the first sounds from Mars that are detectible by human ears, according to the researchers.
Thomas Pike of Imperial College London said the rumbling is “rather different to anything that we’ve experienced on Earth, and I think it just gives us another way of thinking about how far away we are getting these signals.” The noise is of the wind blowing against InSight’s solar panels and the resulting vibration of the entire spacecraft. The sounds were recorded by an air pressure sensor inside the lander that’s part of a weather station, as well as the seismometer on the deck of the spacecraft.
The low frequencies are a result of Mars’ thin air density and even more so the seismometer itself — it’s meant to detect underground seismic waves, well below the threshold of human hearing. The seismometer will be moved to the Martian surface in the coming weeks; until then, the team plans to record more wind noise.