Are We Alone In The Galaxy?

are we alone in the universe this question has been in the minds of scientists for centuries capturing the imagination of people everywhere and driving countless other questions of the unknown many scientists believe that Earth isn't the only place in the UN Universe to host life but considering just how big the universe is with an estimated 2 trillion galaxies perhaps then a better question is are we alone in the Milky Way according to a new study published in the astrophysical journal researchers from the University of Nottingham suggest that the Milky Way galaxy is home to 36 communicating intelligent alien civilizations but how did they arrive at this very specific number they say the estimate is actually conservative and it's based on the assumption that intelligent alien life forms on other planets in a similar way to how it does on Earth the scientists assume that Earth is not special if we imagine a planet much like ours orbiting a star like our sun hosting a civilization that develops technologically in a similar way to humans and under the assumption that it takes 5 billion years for intelligence life to form then there would be at least 36 earthlike civilizations in our galaxy previous calculations of alien life have been based on the Drake equation which includes seven factors needed to find the number of intelligent civilizations but the estimates have been extremely broad ranging from zero to a few billion civilizations with this new method the researchers refined the equation using new data and assumptions they found that there are ly between 4 and 21 civilizations with 36 the most likely number however finding these civilizations is another issue entirely scientists said they would be thousands of light years away but let's begin by exploring Proxima centor B the nearest exoplanet that may potentially Harbor alien life this intriguing World orbits within the habitable zone of Proxima centor the habitable zone or the goldilock zone is the region around a star where the conditions are just right for liquid water to exist on a planet's surface in this Zone the temperature is ideal neither too hot which would cause water to evaporate if the planet were too close to its star nor too cold which would cause water to freeze if the planet were too far away this temperature range offers the potential for Life as we know it to thrive Proxima centor B is very similar in size to Earth with a mass of of approximately 1.17 Earth masses this suggests it's only about 10% larger in diameter than our world the planet is likely tidily locked meaning one side of the planet always faces the star receiving constant daylight while the other side is In Perpetual Darkness there could be three distinct climate zones due to Tidal locking a hot sun-facing side a cold dark side and a potentially habitable Twilight Zone in between if alien life exists on Proxima centor B the unique conditions of being tidily locked could lead to extraordinary adaptations on the perpetually lit side life forms might have evolved to withstand continuous exposure to the Stars radiation possibly developing protective mechanisms or using the constant light to their advantage perhaps through photosynthesis like processes On the Dark Side organisms could have adapted to the extreme cold and constant Darkness possibly relying on geothermal energy or other forms of heat different from Starlight to survive now if intelligent alien life exists on Proxima centor B the implications would be astonishing first it would suggest that intelligent life is likely common throughout the Galaxy considering the Milky Way hosts an estimated 400 billion stars the odds that the only two planets with intelligent life happen to be neighbors would be astronomically low second the discovery could provide clues into the nature of space travel among extraterrestrial civilizations if these neighboring beings have not yet made contact it could indicate that even for a more advanced alien Society Interstellar travel is an even bigger challenge than we thought or it might also suggest that they are technologically less advanced than we are positioning Humanity as the potential first Interstellar visitors in this scenario we would be the aliens arriving on their planet however before we get ahead of ourselves it's crucial to remember that these ideas remain purely speculative the existence of extraterrestrial life let alone intelligent life beyond Earth has yet to be confirmed another intriguing candidate for hosting alien life is Kepler 62e a superar located about 1200 light years away and here's why this exoplanet stands out it's approximately 1.6 times the size of Earth which suggests it might have similar mass and gravity it orbits within the habitable zone of its star which is smaller and cooler than the sun creating potentially ideal conditions for liquid water there's a strong hypothesis that Kepler 62e could be a water world covered mostly or completely by oceans this could mean a variety of of Aquatic Life forms might exist there if Kepler 62e has an atmosphere it's thought to be very cloudy warm and humid extending to the polar regions if it truly is a water world this could make the development of civilization as we know it more challenging yet it does not eliminate the possibility of advanced marine organisms the concept of Life on Kepler 62e is still speculative but it's a top candidate in the search for alien in life due to these promising characteristics however its great distance from Earth means that our current technology doesn't allow us to study it in detail to confirm these possibilities Glee 667cc is another Super Earth with the potential to host alien life the planet has a radius 1.7 times that of Earth and is about 23 light years away Glee 667 cc is part of a triple star system which could mean that if you were standing on the planet you might see three suns in the sky its host star is a red dwarf with about a third as much mass as the sun as a result stars like Glee 667 C can live up to 150 billion years or 15 times longer than the sun's lifespan even if alien life does not currently exist on Glee 667cc the system's potential lifespan of one 150 billion years offers an extended window for life to emerge and evolve this prolonged period of stability far exceeds that of our own Sun providing more than enough time for complex life forms to develop at a later stage in the planet's history G 667 cc is among five other planets that orbit the red dwarf star three of which are within the habitable zone this makes this system a prime candidate for the potential of alien life however whether life actually exists there remains a mystery as we currently lack the technology to detect life at such a distance directly the study of exoplanets like Glee 667 CC helps astronomers understand the conditions under which life might arise and how common habitable worlds might be in our galaxy Kepler 22b is another fascinating alien world categorized as a super Earth and is about 2.4 times Earth's radius the planet's composition is still a matter of debate it could be covered in a vast Ocean or it might even be gaseous but if it is an ocean world it's possible that life could exist in such an environment as suggested by some scientists involved in the Kepler project the idea of an ocean world is particularly interesting because it opens the possibility of Aquatic Life forms however with a staggering distance of about 640 light years separating us from Kepler 22b it's currently beyond our reach for direct exploration using today's technology now picture an advanced alien civilization on Kepler 22b peering through sophisticated telescopes aimed at Earth what they'd be observing is our planet as it was back in the year 1384 they would see Earth's Medieval Era this delay is due to to light the fastest thing in the universe taking 640 years to travel from our world to theirs yet even as vast as 640 light years may seem it represents less than 1% of our Milky Way staggering bread of 100,000 light years so far our exploration of exoplanets has barely touched a tiny fraction of the potentially habitable worlds that might exist out there drawing on data from the kep Space Telescope estimates suggest there could be up to 300 million potentially habitable planets within our galaxy alone considering this estimating only 36 potential alien civilizations in the Milky Way seems extraordinarily conservative now let's imagine for a moment that each Galaxy hosts just one single civilization if true with the estimated 2 trillion galaxies in the observable universe there would be a minimum of 2 trillion civiliz izations out there faced with these numbers it's humbling to realize that our civilization might just be a tiny Speck as viewed from the broad Cosmic perspective as we gaze out into the Stars we must ask ourselves what Legacy will We Leave Behind in this Cosmic sea of possibilities

Channel: Science Time

Views: 101,816

Keywords: are we alone in the galaxy, are we alone in the universe, the fermi paradox, alien life, intelligent alien life, alien life on other planets, proxima b, 36 alien civilizations, kepler 22b, gliese 667 cc, we are not alone in the universe, evidence of alien life, why havent we found aliens, intelligent aliens, how aliens would look like, aliens on other planets, life beyond, universe, science, are we alone in the milky way, science time

Id: c53yK1MJOYI

Length: 10min 54sec (654 seconds)

Published: Sat Apr 27 2024