posted on 01/04/2022 17:47 / updated 01/04/2022 18:10
NASA’s Perseverance Rover Can Capture Sounds From Mars – (Credit: Reproduction / NASA)
The sounds of Mars captured by a NASA (United States Space Agency) robot helped scientists to better understand the conditions on the planet. With the recordings, it was found that the speed of sound is different from Earth and that, in some seasons of the year, the planet emits less sounds than in others. (Listen to the sounds at the end of the story).
the microphone of perseverance rover — robot that is part of the mission Mars 2020 Perseverancewhose main objective is to study the planet’s astrobiology — managed to capture the sounds and, from the recordings, a study identified that the speed of sound is slower on the Red Planet than on Earth, with a deep silence prevailing in most of the time.
The study — published in the journal nature this Friday (4/1) — reveals how fast sound travels through the extremely thin atmosphere, composed mainly of carbon dioxide, and what it might sound like to human ears. In addition, scientists used the audio recordings to probe subtle changes in air pressure on the planet.
The big difference found is that on Mars the speed of sound is slower than on Earth, where sounds normally travel at 767 miles per hour (343 meters per second). But on Mars, bass sounds travel at about 240 meters per second, while higher sounds move at 250 meters per second.
See more images from the mission perseverance
According to Sylvestre Maurice, an astrophysicist at the University of Toulouse, in France, and lead author of the study, the scientists believed that the robot’s microphone was broken, given the silence on the planet. “One of the most striking features of sound recordings is the silence that seems to prevail on Mars,” he said.
For Baptiste Chide, who also participated in the study, the Martian silence is a consequence of Mars having a thin atmosphere. “Mars is very quiet because of low atmospheric pressure.”
However, they explain that the pressure there changes with the seasons, so in the coming months Mars could get “noisier”. “We are entering a season of high pressure. Perhaps the acoustic environment on Mars is less quiet than when we landed,” explained Chide.
Listen to the sounds of the planet: