How Possible Is The Existence Of Extraterrestrial Life?
Extraterrestrial Life – When aliens arrive in the movies, they typically come from distant galaxies. Extraterrestrial life, however, could exist right here in our solar system, nestled in briny oceans under the surface of icy worlds close to home.
Many thinkers have been led astray by anthropic assumptions, while others were simply led astray by ignorance. Due to lack of information tells us that it’s prudent to guide ourselves by the notion that we are not special. That is generally the Copernican principle. This principle places the Sun back in the middle of our solar system where it belongs. The sixteenth-century Italian monk Giordano Bruno suggested publicly that an infinite universe was filled with planets that harbor life.
So far, life on Earth is the only life we know in the universe. But there are compelling arguments to suggest we are not alone. Indeed, most astrophysicists agree there may be life elsewhere in the universe. And, maybe life exists on other planets or moons inside our own solar system. The numbers are, well, astronomical: If the count of planets in our solar system is not unusual, then there are more planets in the universe than the sum of all sounds and words ever pronounced by every human who has ever lived. There is no reason for declaring Earth as the only planet in the cosmos with life.
The Possibility of Extraterrestrial Life!
In 2016, scientists announced the discovery of three, Earth-size, rocky planets orbiting around a red dwarf star that’s about the size of Jupiter. Planets in this system gather around their home star in tightly packed orbits—TRAPPIST-1b circles its star once per day. And because red dwarfs are cooler than our sun, experts think that several of these planets could be habitable, despite proximity to their star.
The closely packed solar system begs a tantalizing question: Are these planets exchanging life via space rocks? Some theories say that life on Earth may have come from Martian rocks. And if that’s the case, Harvard University researchers argue that the odds of the same thing occurring in the TRAPPIST-1 system are magnitudes higher.
Seeking forward, we first need to determine if life indeed exists in TRAPPIST-1. Telescopes prepared to launch soon will be able to probe planets’ atmospheres in the system. They will be able to detect bio-signatures associated with life as we know it on Earth. Scientists could also search for “red edge” spectral signals that hint at the presence of vegetation.
If life exists…
…Researchers could then theoretically verify the panspermia hypothesis, as well. If “red edge” signals are the same on several TRAPPIST-1 planets, that would indicate life sprung forth from a singular source.
Life relies on “left-handed” amino acids and right-handed sugars. If organisms on TRAPPIST-1 planets all adhere to the same chirality rules, that’s a good sign that life hopped from a planet to another. But if the rules were different on each planet, it would be an indication that life evolved in isolation.
Alan Stern, the principal investigator of NASA’s New Horizons mission, has another theory to add to all this, which he shared at the recent 49th annual meeting of the American Astronomical Society’s Division for Planetary Sciences.
As Space.com reports, Stern floated the idea that perhaps intelligent life does exist in other parts of the galaxy. But they live in dark oceans found deep beneath the surfaces of whatever planet they live on. Such oceans should exist in our galaxy, as they do in our own solar system. Look no further than oceans on Pluto, Jupiter’s moons, or Saturn’s moon Titan for evidence of that. Buried oceans would also give life more time to evolve. As it would also protect them from anything that typically only affects the surface.
“Impacts and solar flares, and nearby supernovae, and what orbit you’re in, and whether you have a magnetosphere, and whether there’s a poisonous atmosphere — none of those things matter,” Stern said to Space.com.
Why is Extraterrestrial Life discovery still a dream?
Basically, Earth is unique. The Rare Earth hypothesis argues that planets with complex life, like Earth, are extremely rare and intelligent extraterrestrial life is highly improbable. Hence we are one of a kind.
Dr. Aditya Chopra, suggest that alien beings are all dead. Life on “habitable” planets failed to emerge quickly enough to stabilize the planet and pave the way for more life.
Earth was subjected to the Great Filter – Five mass extinction events – but evolved complex creatures. Moreover, Earth had a head start. In a study, Dr. Peter Behroozi said that compared to all the planets that will ever form in the Universe, the Earth is actually quite early. The last star will burn out 100 trillion years from now, and 92% of planets are yet to be born. We are the first but not necessarily last.
Approx. 46.5 light – years is the distance to the edge of the observable universe (that’s significant distance). We’ve scanned for extraterrestrial life to just around 40,000 light years from Earth; we haven’t even outpassed the bounds of our galaxy, which is 100,000 light – years wide. Extraterrestrial life could simply be too far away for our current technology to reach.
Seth Shostak, from the Search for Extra-Terrestrial Intelligence (SETI) Institute, while speaking to Futurism predicted that we would find intelligent alien life within the next 20 years. He even betted everyone “a cup of coffee” that the existence of intelligent extraterrestrials will be confirmed within the next two decades. He further added, “in the last 20 years, understanding of the cosmos has expanded significantly it is now known just how many planets there are that could host alien life.”
Moreover, he gave a hope by further saying, “We may find microbial life—the kind you’d find in the corners of your bathtub. We may find that a lot sooner, but that remains for the future. But it’s going to happen, I think, in your lifetime.”
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