Intelligent Extraterrestrial Civilizations And The Radio Signal From Ganymede

Date:Jan 19, 2021


Although it was immediately confirmed that it was not a sign of intelligent life, the importance of inquiring about space issues reappeared.

The National Aeronautics and Space Administration (NASA) reported that it captured a radio signal from Ganymede - one of Jupiter's moons - through Juno soda, although it immediately ruled out that it was a sign of intelligent life.

Juno is a mission belonging to the New Frontiers program and was sent into space in 2011. For months it has been in the area collecting data on the activity of the planet, its spots and its electrical activity.

While the probe was in one of Ganymede's polar regions, it detected a radio signal, which was reported to be of natural origin and caused by electrons that “oscillate at a slower speed than they rotate, which causes the waves to amplify. of radio very quickly ”, explained Patrick Wiggins, NASA ambassador in Utah, according to El Confidencial.

“The process is called cyclotron maser instability (CMI). The electrons that generate the radio signal can also cause auroras in the far ultraviolet spectrum, a phenomenon also observed by the camera on Juno, "added Wiggins, which is also known as" decameter radio emission. "

Ganymede is one of Jupiter's Mondays but is slightly larger than Mercury. It also has a magnetic field and it is believed that under the initial ice on its surface there could be a sea of salt water.


Share the galaxy

In July 2020, a study by scientists from the University of Nottingham (England) published that the human race would share the Milky Way with up to 36 intelligent alien civilizations, taking into account a series of events that occurred on Earth that were extrapolated to other celestial bodies.

As reported by The Astrophysical Journal, they worked with two scenarios called "strong and weak Copernican astrobiological conditions", where the possibility of planets such as Earth in habitable zones, stars rich in metals such as the Sun and the history of star formation were analyzed. .

Experts postulate that life tends to form between 4,500 and 5,500 million years (as on Earth), therefore in the galaxy there must be 36 civilizations with a communicational development similar to ours if they had developed near a star like the sun.

“If spread evenly across the galaxy, this would imply that the closest communicating intelligent civilization (or CETI as they called it) is 17,000 light-years away and probably hosted by a low-mass M dwarf star, far exceeding our ability to detect it in the near future and making interstellar communication impossible ”, they explained.

The search for intelligent extraterrestrial civilizations would also give clues to the future of humans, “If we discover that intelligent life is common, this would reveal that our civilization could exist for much longer than a few hundred years. Alternatively, if we find that there are no active civilizations in our galaxy, it is a bad sign for our own long-term existence, ”said Christopher Conselice, Professor of Astrophysics at the University of Nottingham.