NASA has translated data collected from a probe into an eerie sound recording that shows what it sounded like when it flew past Venus on a mission to study the sun.
The natural radio signal was discovered by Parker Solar Probe when it reached the planet's upper atmosphere in July, 2020.
The space agency said the signal was the first direct measurement of the Venusian atmosphere in nearly 30 years and the data helped scientists study the atmosphere of "Earth's less hospitable twin".
Posting the audio on NASA's social media accounts, the probe picks up a low rumbling noise as it approaches the ionosphere.
When it reaches the upper atmosphere, it records a high-pitched whirring sound and it continues to grow for three seconds.
As the probe leaves the area, the sound drops back to a low rumble.
The team responsible for collecting the data explained: "During a brief swing by Venus, NASA’s Parker Solar Probe detected a natural radio signal that revealed the spacecraft had flown through the planet’s upper atmosphere.
"This was the first direct measurement of the Venusian atmosphere in nearly 30 years – and it looks quite different from Venus' past.
"A study published today in Geophysical Research Letters confirms that Venus’ upper atmosphere undergoes puzzling changes over a solar cycle, the Sun’s 11-year activity cycle.
"This marks the latest clue to untangling how and why Venus and Earth are so different.
"The data sonification in the video translates data from Parker Solar Probe’s FIELDS instrument into sound."
FIELDS detected a natural, low-frequency radio emission as it moved through Venus’ atmosphere that helped scientists calculate the thickness of the planet’s electrically charged upper atmosphere, called the ionosphere.
The new findings can give insight to how Venus' ionosphere changes and help scientists understand how Venus, once so similar to Earth, became the world of scorching, toxic air it is today.
Viewers were fascinated by the sound as some compared it to sci-fi movie sound effects in the 1960s.
One said: "Sounds like an alien spaceship in an old science fiction movie."
"I believe Star Trek called them Siren Calls," a second wrote and a third added: "OK, that seriously sounds like a 1950s/60s movie space ship landing."
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