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Category: alien life – Page 15

However, Dr. Robin Wordsworth of Harvard University and Dr. Charles S. Cockell of the University of Edinburgh argue that this focus has left unexplored possibilities for life in environments that don’t resemble our own.

In a preprint paper accepted for publication in the journal Astrobiology, researchers challenge conventional assumptions about extraterrestrial life and explore the feasibility of life existing in structures created by living organisms themselves.

As researchers suggest, life-supporting conditions created solely by biological structures could indeed exist, making it entirely possible for some forms of life to thrive in space habitats vastly different from those on Earth.

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According to astrophysicist Erik Zackrisson’s computer model, there could be about 70 quintillion planets in the universe. However, most of these planets are vastly different from Earth — they tend to be larger, older, and not suited for life. Only around 63 exoplanets have been found in their stars’ habitable zones, making Earth potentially one of the few life-sustaining planets. This could explain Fermi’s paradox — the puzzling lack of evidence for extraterrestrial life. While we continue searching, Earth might be truly special.

After reading the article, Harry gained more than 55 upvotes with this comment: “If life developing on Earth the way it has is 1 in a billion, then this would imply that there is life on at least a billion other planets (?)”

The prevailing belief among astronomers is that the number of planets should at least match the number of stars. With 100 billion galaxies in the universe, each containing about a billion trillion stars, there should be an equally vast number of exoplanets, including Earth-like worlds — in theory.

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What if reality ISN’T REAL? Join us… and find out!

Subscribe: https://wmojo.com/unveiled-subscribe.

In this video, Unveiled takes a closer look at simulation theory — the suggestion that everything you THINK is real, is actually an artificially generated sim!

This is Unveiled, giving you incredible answers to extraordinary questions!

Find more amazing videos for your curiosity here:
Is NASA About to Announce Alien Life? — https://youtu.be/lXT-2cQqiWU?
10 Big Questions About Parallel Universes — https://youtu.be/KjLmRVHHgMY?

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When considering the potential for life on exoplanets, scientists often focus on the habitable zone, the region around a star where conditions might allow liquid water to exist. However, new research suggests that this concept alone oversimplifies the dangers these planets face. It’s not just about being in the right place; it’s also about avoiding interstellar chaos.

While identifying exoplanets in the habitable zone is a crucial step in the search for extraterrestrial life, their environments can be treacherous. In a study soon to be published in The Astronomical Journal, researchers led by Tisyagupta Pyne from Visva-Bharati University highlight the threats lurking in dense stellar neighborhoods. Stellar flybys and catastrophic supernovae explosions have the power to disrupt entire planetary systems, stripping atmospheres or ejecting planets into interstellar space.

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String theory could reshape our understanding of the Universe’s accelerating expansion and unlock the mysteries of dark energy.

The accelerating expansion of the Universe might not be just an unexplained phenomenon — according to a new proposal by theoretical physicists, it could be a fundamental feature woven into the very fabric of reality.

The researchers suggest that space is not an empty vacuum but that instead our whole Universe is a complex quantum object called the Glauber-Sudarshan state, where countless interacting strings are constantly born and disappear. This hypothesis breathes new life into string theory, which has long aimed to unify all the fundamental forces of nature.

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Could Earth be a cosmic sanctuary for observation? The Zoo Hypothesis suggests so.

In 1950, Italian-American physicist Enrico Fermi famously asked, “Where is everybody?” The question has since become the basis of the Fermi Paradox, addressing the conflict between the high probability of extraterrestrial life and the complete lack of evidence for its existence. Several hypotheses have been proposed to explain this, including the Zoo Hypothesis, first introduced in 1973 by Harvard astrophysicist John A. Ball. This theory posits that advanced alien civilizations may know of Earth and its inhabitants but choose to avoid contact, allowing humanity to develop naturally without interference.

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A new study by Penn State and the SETI Institute explored alien signal detection in the TRAPPIST-1 system using innovative techniques focused on planetary alignments.

Astronomers have developed a new technique to search for radio signals from planets beyond our solar system, particularly those aligned with both each other and Earth. These signals would be similar to those used for communication with rovers on Mars. Penn State astronomers, in collaboration with scientists at the SETI Institute, spent 28 hours using the Allen Telescope Array (ATA) to scan the TRAPPIST-1 star system for signs of alien technology. This effort represents the longest focused search for radio signals from TRAPPIST-1 to date.

Although no evidence of extraterrestrial technology was found, the project introduced a new method for future searches. The research has been accepted for publication in the Astronomical Journal.

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A team of engineers and planetary scientists at Western University’s Institute for Earth and Space Exploration, in Canada, has found that it might be possible to produce food for space travelers by feeding bacteria asteroid material, resulting in the growth of an edible biomass.

In their paper published in the International Journal of Astrobiology, the group describes how they tested the idea by calculating how much asteroid material would be needed and what they found.

Prior research has shown that future spacecraft traveling to remote parts of the solar system or beyond could not possibly hold enough food to sustain astronauts. Such craft could not support the growth of enough food onboard, either.

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Can rocky exoplanets orbiting stars smaller than our Sun support life as we know it? This is what a recent study published in Nature Communications hopes to address as an international team of researchers examined the atmospheric stability of exoplanets orbiting M-dwarf stars, which typically range from 7.5 percent to 50 percent of our Sun’s mass and surface temperatures of approximately 3,500 degrees Celsius (6,300 degrees Fahrenheit) with our Sun boasting surface temperatures of approximately 5,000 degrees Celsius (9,000 degrees Fahrenheit). This study holds the potential to help astronomers better understand the conditions for finding life beyond Earth and where we can find it.

For the study, the researchers examined TRAPPIST-1, which is an M-dwarf star located approximately 40 light-years from Earth while boasting seven rocky exoplanets, several of which orbit within its star’s habitable zone (HZ). Using computer models, the team simulated the formation and evolution of the orbiting exoplanets to ascertain if their individual atmospheres could remain stable over time to form a habitable environment. In the end, the team found that the exoplanets that orbit close to their star likely do not possess stable atmospheres, but found promising results for exoplanets orbiting farther out, specifically TRAPPIST-1 e.

“One of the most intriguing questions right now in exoplanet astronomy is: Can rocky planets orbiting M-dwarf stars maintain atmospheres that could support life?” said Dr. Joshua Krissansen-Totton, who is an assistant professor of Earth and space sciences at the University of Washington and lead author of the study. “Our findings give reason to expect that some of these planets do have atmospheres, which significantly enhances the chances that these common planetary systems could support life.”

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In a remarkable encounter off the coast of Alaska, human scientists had what they describe as a “conversation” with a humpback whale named Twain. Dr. Brenda McCowan from the University of California Davis was at the heart of this unexpected exchange.

Dr. McCowan and her team, known as Whale-SETI, have been studying how humpback whales communicate. They’re aiming to understand whale communication systems to help in the search for life beyond Earth.

Using an underwater speaker, the team played a recorded humpback “contact” call into the ocean. To their astonishment, Twain approached their boat and began responding.

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