Post by Andrei Tchentchik on Apr 6, 2019 11:08:23 GMT 2
(.#173).- The Fermi paradox.
The Fermi paradox.
Advances in the pursuit of extraterrestrial intelligence continue over the decades. The theories of some researchers have engendered the famous Fermi paradox.
The Fermi paradox. © Albert Ziganshin, Shutterstock
The Fermi paradox. © DR
Many questions about extraterrestrial life
Drake, Cocconi, Morrison were not the only ones or the first scientists to question the existence of extraterrestrial life. In 1822, the mathematician Gauss proposes to draw a rectangle triangle visible from space to prove our knowledge of the Pythagorean theorem to possible Martians. The scientist Camille Flammarion wondered about the plurality of worlds.
The physicist Enrico Fermi exclaimed, "But where are they? In 1950 when he went to the canteen with his colleagues. His reasoning is simple. Imagine that around a star older than the Sun, a civilization wanted to colonize the galaxy. It travels at 1% of the speed of light, which is not much, but we are still very far away.
In 500 years, this civilization has traveled 5 light-years, which is equivalent to the nearest stars. She settles on a planet for 500 years and leaves. At this rate, it would take 20 million years to colonize the entire galaxy, that is half a day in the cosmic calendar.
Paradox and cosmic calendar. If an alien passed on Earth between 24 and 28 December of the astronomical calendar, he only met with dinosaurs ... © DR
These arguments were first used by scientists to insist on our listening to the sky and the existence of technological civilizations around the stars near the Sun. They were later taken up by astronomers explaining that since we had not captured anything, life was not present in the universe other than on Earth; therefore, we were alone.
The famous Fermi paradox
From this was born the paradox, today unresolved. We can make many assumptions, ranging from "They are here, I met an ET yesterday" to "We are alone" through the "cosmic zoo" (they observe us), or "They came and then left" but none has been verified!
Carl Sagan said, "Extraordinary postulate, extraordinary evidence. If an alien visited the Earth between December 24 and December 28 of the cosmic calendar, he met only dinosaurs ... But it can not be claimed that this happened with evidence and strong arguments .
F I N .
The Fermi paradox.
Advances in the pursuit of extraterrestrial intelligence continue over the decades. The theories of some researchers have engendered the famous Fermi paradox.
The Fermi paradox. © Albert Ziganshin, Shutterstock
The Fermi paradox. © DR
Many questions about extraterrestrial life
Drake, Cocconi, Morrison were not the only ones or the first scientists to question the existence of extraterrestrial life. In 1822, the mathematician Gauss proposes to draw a rectangle triangle visible from space to prove our knowledge of the Pythagorean theorem to possible Martians. The scientist Camille Flammarion wondered about the plurality of worlds.
The physicist Enrico Fermi exclaimed, "But where are they? In 1950 when he went to the canteen with his colleagues. His reasoning is simple. Imagine that around a star older than the Sun, a civilization wanted to colonize the galaxy. It travels at 1% of the speed of light, which is not much, but we are still very far away.
In 500 years, this civilization has traveled 5 light-years, which is equivalent to the nearest stars. She settles on a planet for 500 years and leaves. At this rate, it would take 20 million years to colonize the entire galaxy, that is half a day in the cosmic calendar.
Paradox and cosmic calendar. If an alien passed on Earth between 24 and 28 December of the astronomical calendar, he only met with dinosaurs ... © DR
These arguments were first used by scientists to insist on our listening to the sky and the existence of technological civilizations around the stars near the Sun. They were later taken up by astronomers explaining that since we had not captured anything, life was not present in the universe other than on Earth; therefore, we were alone.
The famous Fermi paradox
From this was born the paradox, today unresolved. We can make many assumptions, ranging from "They are here, I met an ET yesterday" to "We are alone" through the "cosmic zoo" (they observe us), or "They came and then left" but none has been verified!
Carl Sagan said, "Extraordinary postulate, extraordinary evidence. If an alien visited the Earth between December 24 and December 28 of the cosmic calendar, he met only dinosaurs ... But it can not be claimed that this happened with evidence and strong arguments .
F I N .
