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American Focus > Blog > Tech and Science > Aliens Could Eavesdrop on Our Radio Communications, NASA Study Says : ScienceAlert
Tech and Science

Aliens Could Eavesdrop on Our Radio Communications, NASA Study Says : ScienceAlert

Last updated: September 19, 2025 3:05 pm
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Aliens Could Eavesdrop on Our Radio Communications, NASA Study Says : ScienceAlert
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How Alien Civilizations Could Eavesdrop on Our Communications with Spacecraft

Recent research suggests that alien civilizations could potentially eavesdrop on our communications with spacecraft and rovers, presenting a fascinating avenue for potential extraterrestrial contact. Scientists from Pennsylvania State University and NASA’s Jet Propulsion Laboratory have shed light on how radio waves sent towards neighboring planets in our Solar System could be intercepted by intelligent beings elsewhere in the cosmos.

When mission scientists transmit instructions to Mars rovers or orbiters, a portion of the radio waves continues into space, traveling indefinitely. This means that any extraterrestrial intelligence positioned along this expanding line of radio waves could intercept our transmissions. Pinchen Fan, an astronomer at Penn State, highlights that based on the data from the last two decades, there is a 77 percent probability that alien civilizations could intercept our signals if they were in a position to observe the alignment of Earth and Mars.

Aliens Could Eavesdrop on Our Radio Messages to Mars – But We Could Do The Same to Them
An illustration of where we’re beaming our radio signals across the Solar System. (Zayna Sheikh)

The study analyzed data from NASA’s Deep Space Network (DSN), which facilitates communication with spacecraft beyond the Earth-Moon system. Aliens strategically positioned in alignment with our Solar System’s planetary plane edge would have the best chance of intercepting our transmissions, particularly if they were within a 23-light-year radius from Earth.

Interestingly, this phenomenon could also be used in reverse to detect potential alien civilizations. By observing nearby planetary systems where two planets align from our perspective, we might uncover radio signals from intelligent beings exploring their own neighboring planets. Fan suggests that advancements in exoplanet detection, such as NASA’s upcoming Nancy Grace Roman Space Telescope, could significantly expand our search area for extraterrestrial signals.

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The findings of this study were published in the Astrophysical Journal Letters, opening up new possibilities for interstellar communication and exploration.

TAGGED:alienscommunicationsEavesdropNasaradioScienceAlertStudy
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