A signal beamed at Earth from Mars in 2023 has finally been decoded by a father and daughter team in the United States. In 2023, a coded message was beamed at Earth from Mars. After over a year, this simulated extraterrestrial signal was finally decoded.1 day ago

The European Space Agency’s (ESA) ExoMars Trace Gas Orbiter Mars probe beamed the signal at us in May 2023 as part of “A Sign in Space,” a multi-week art project led by Daniela de Paulis, the current Artist in Residence at the SETI Institute in Mountain View, California and the Green Bank Observatory in West Virginia. The project was intended as an experiment to test what types of techniques might be useful for decoding signals that might be detected as part of SETI (search for extraterrestrial intelligence) efforts.

After over a year, a father-daughter team has decoded that signal. Ken and Keli Chaffin were able to decipher the message after “following their intuition and running simulations for hours and days on end,” according to an ESA statement. 

A father and daughter team based in the U.S. have decoded a mock “alien signal” beamed from ESA’s ExoMars Trace Gas Orbiter a year ago — but the meaning of the extraterrestrial message remains a mystery

father-daughter team has decoded a mock “alien” message after a year of trying. Now, citizen scientists are trying to figure out what the decoded missive truly means for Earth.

The message turned out to be an image depicting the structure of five amino acids, the building blocks of proteins. It was the brainchild of a group of “simulated extraterrestrials,” according to A Sign in Space, which included de Paulis, as well as a computer scientist, a poet, a radio engineer, a physicist and space lawyer, and several astronomers and astrobiologists.

A father-daughter team decoded an “alien message” that an online community tried to crack for a year. ESA’s ExoMars Trace Gas Orbiter sent the mock alien message to Earth from Mars in May 2023 as part of a citizen science project.  

The message was heard by the three observatories and the data were made available to the public. The messages had two challenges; first, to extract the signal from the raw data and second to decode it.  

Ken and Keli Chaffin from the US were the first to decode the signal, sent from ESA’s ExoMars Trace Gas Orbiter, as part of a citizen science project in May 2023. According to experts, the exercise will help determine whether or not humanity is ready to make first contact with an alien civilization.

Brainchild of simulated extraterrestrials

The project is the brainchild of a group of “simulated extraterrestrials,” which included de Paulis, as well as a computer scientist, a physicist and space lawyer, a poet, a radio engineer, and several astronomers and astrobiologists. 

Amid all this, the answer to what aliens are trying to convey by sending pictures of five amino acids is still not clear. The mystery still needs to be solved. Now, the citizen scientists are connecting on the discord servers and debating on the meaning of the message. 

The signal wasn’t actually sent by extraterrestrials. It was a simulated alien signal beamed from Mars by the European Space Agency’s ExoMars Trace Gas Orbiter as part of an art project called “A Sign in Space.”
While the signal itself wasn’t from aliens, the decoding process engaged thousands of citizen scientists worldwide. It was a father-daughter team, Ken and Keli Chaffin, who finally cracked the code after months of effort. The decoded message revealed a diagram depicting the structure of five amino acids, the building blocks of life.
This event highlights the power of citizen science and the excitement surrounding the possibility of extraterrestrial communication.

The wow signal

The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University’s Big Ear radio telescope in the United States, then used to support the search for extraterrestrial intelligence. The signal appeared to come from the direction of the constellation Sagittarius and bore expected hallmarks of extraterrestrial origin. The Wow! signal represented as “6EQUJ5”. The original printout with Ehman’s handwritten exclamation is preserved by Ohio History Connection. Astronomer Jerry R. Ehman discovered the anomaly a few days later while reviewing the recorded data.
METI president Douglas Vakoch told Die Welt that any putative SETI signal detections must be replicated for confirmation, and the lack of such replication for the Wow! signal means it has little credibility. In August 2024, the Planetary Habitability Laboratory published a preprint reporting observations made in 2020 at the Arecibo Observatory in Puerto Rico—where they conclude that the Wow! signal was likely caused by a rare astrophysical event, in which stellar emissions energizing a cold hydrogen cloud caused it to suddenly surge in brightness.

• Decoding an alien signal depends on various factors:
  Signal Strength and Clarity: A strong, clear signal is more likely to be decipherable. Weak or distorted signals may be challenging to interpret.
  Signal Format: The format of the signal (e.g., digital, analog, modulated) will influence decoding methods. A simple, well-structured signal is easier to decode than a complex one.
  Underlying Language or Code: If aliens use a language or code similar to ours, decoding might be easier. However, if they use a completely different system, it could be extremely difficult.
  Our Technological Capabilities: Our current technology and understanding of signal processing and cryptography will play a significant role. Advancements in these fields could improve our ability to decode alien signals.
  International Collaboration: A global effort involving scientists, mathematicians, and linguists could significantly increase our chances of decoding an alien signal.
  While we can’t definitively say whether we could decode an alien signal today, the recent success in decoding the simulated alien signal from Mars shows that with dedicated effort and technological advancements, it’s not entirely impossible.

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