Post AxXCpqdWbhLCF3wlwu by seth73@berlin.social
(DIR) More posts by seth73@berlin.social
(DIR) Post #AxKqXpaXEhUstF275k by spaceflight@spacey.space
2025-08-18T16:35:26Z
3 likes, 5 repeats
Given the currently 5983 confirmed #planets 🪐 https://exoplanetarchive.ipac.caltech.edu, the 100–400 billion stars in the #MilkyWay 🌌 https://en.wikipedia.org/wiki/Milky_Way and 200 billion to 2 trillion #galaxies https://en.wikipedia.org/wiki/Galaxy in the observable 🔭 #universe, do you expect #intelligent life exists#SETI #exoplanets #FermiParadox
(DIR) Post #AxXCpqdWbhLCF3wlwu by seth73@berlin.social
2025-08-22T03:21:26Z
0 likes, 0 repeats
@spaceflight In the Universe, but apparently not in our Galaxy ;)
(DIR) Post #AxXCps3nJVwqepFGXA by spaceflight@spacey.space
2025-08-22T11:37:00Z
0 likes, 0 repeats
@seth73 intelligent life would probably avoid broadcasting 📣, as experience shows that civilizations with superior technology often oppress or destroy others
(DIR) Post #AxXCpt5xSxGzrpGVXs by StarProphet@noauthority.social
2025-08-25T17:05:58Z
0 likes, 0 repeats
@spaceflight @seth73 An intelligent lifeform, that masters cheap mass space travel, would rapidly saturate every star system in the Milky Way galaxy in only a few million years.So it's highly unlikely that there's another intelligent life form in the Milky Way.
(DIR) Post #AxXEuSpGlGkLkclkK8 by spaceflight@spacey.space
2025-08-25T17:29:15Z
0 likes, 0 repeats
@StarProphet would we have noticed that and how ?
(DIR) Post #AxXFlpaoqSKzi2SQhk by StarProphet@noauthority.social
2025-08-25T17:38:55Z
0 likes, 0 repeats
@spaceflight "would *we* have noticed that and how?"Likely there would be no "we."If there was a non-human intelligent lifeform in the Milky Way galaxy, we humans wouldn't exist. For the Earth's solar system would've been colonized billions of years ago, along with every other star system in the entire Milky Way galaxy. Even the dinosaurs wouldn't have existed.If a star-faring ET civ arose 10,000 years ago in the Milky Way (highly unlikely), their EM cone hasn't reached us yet.
(DIR) Post #AxXgxqdfTnIPBskESm by spaceflight@spacey.space
2025-08-25T22:43:36Z
0 likes, 0 repeats
@StarProphet what if the mixture of elements on earth is just not attractive to them ? 🤔
(DIR) Post #AxXhWEAeUiso1HZAES by StarProphet@noauthority.social
2025-08-25T22:49:50Z
0 likes, 0 repeats
@spaceflight "what if the mixture of elements on earth is just not attractive to them ?"Which elements do you think would be "unattractive" to an ET colonizing every world in the Milky Way galaxy?Earth has the same volatiles as Callisto, and the same minerals as the Moon.
(DIR) Post #AxYnUqTjtDbT8KB6Lg by spaceflight@spacey.space
2025-08-26T11:31:30Z
0 likes, 0 repeats
@StarProphet they could be anaerobic
(DIR) Post #AxtLm6DBvjxWSF2Feq by StarProphet@noauthority.social
2025-09-05T09:29:51Z
0 likes, 2 repeats
@spaceflight Being aerobic or anaerobic is no obstacle to a space faring civilization in the vacuum of space.
(DIR) Post #AxtzWXhjwRVhFrSe2K by spaceflight@spacey.space
2025-09-05T16:55:10Z
0 likes, 0 repeats
@StarProphet ...to fly to a planet with methane atmosphere https://en.wikipedia.org/wiki/Methanotroph
(DIR) Post #Axu7mYOXwRTrf9d3vk by StarProphet@noauthority.social
2025-09-05T18:27:46Z
0 likes, 0 repeats
@spaceflight Which is still no obstacle to any intelligent life form that traveled through the *vacuum of space*.Moon's vacuum environment, Mars's thin CO2 atmosphere, and Titan's N2 CH4 atmosphere are all unbreathable to humans. Humans solve that by bringing their own atmosphere with them. A solution that is well within an interstellar traveling intelligence's ability to solve.
(DIR) Post #Axw4zXaGMCi9MjWvqq by spaceflight@spacey.space
2025-09-06T17:05:52Z
0 likes, 0 repeats
@StarProphet First of all, humans have not yet solved the atmospheric problem. In addition, there is the problem of humanity's short-sightedness with regard to the Milky Way (similar to the recent situation with regard to the American continent).#Intelligent life would choose more suitable planets, provided that transport technology were advanced enough. There are also uninhabited islands on Earth that no one is interested in. The life there is unaware of the humanity around it.
(DIR) Post #AxxdSj1sTQHOrPUiv2 by StarProphet@noauthority.social
2025-09-07T11:06:53Z
1 likes, 2 repeats
@spaceflight Interstellar travel requires centuries of travel in pressurized compartments (if you’re a squishy organism), so any interstellar civilization will have no problem bringing their own atmosphere with them. The average human limit for stable civilization is 250 years. There are exceptions of course (the Roman Empire lasted 1,500 years, China is 5,000 years old, Pharaonic Egypt lasted 3,000 years).
(DIR) Post #AxxgXfjSSX4XwevgNE by spaceflight@spacey.space
2025-09-07T11:41:22Z
0 likes, 0 repeats
@StarProphet Are we still talking about possible interstellar travel that may not have reached us yet ?
(DIR) Post #AxxtHrHP3aouWub3RI by StarProphet@noauthority.social
2025-09-07T14:04:12Z
0 likes, 1 repeats
@spaceflight "Are we still talking about possible interstellar travel that may not have reached us yet ?"It takes Centuries/decades to cross the interstellar distances. Making it faster than that is harder than just making a pressurized tank to carry your atmosphere with you.
(DIR) Post #B05cnwmXUJQr23nXFo by spaceflight@spacey.space
2024-02-23T18:03:02Z
0 likes, 0 repeats
🔭 #PlanetNine is likely to be the fifth largest 📏 #planet 🪐 in the #SolarSystem 🌌 https://www.independent.co.uk/space/nine-planet-solar-system-b2500389.html#Astronomy #Telescope #JWST #Hubble #DarkMatter #SETI
(DIR) Post #B05cny64bAeT6vweLA by spaceflight@spacey.space
2024-02-24T17:07:17Z
0 likes, 0 repeats
An advanced #extraterrestrial civilization could potentially detect 🔭 signs of life on Earth. But the #scale of the #universe 🌌 is incredibly vast. Even at the speed of light, signals 📶 from #Earth 🌏 have only reached a very small portion of our #galaxy. https://newspaceeconomy.ca/2023/07/15/can-extraterrestrial-life-detect-us/#SETI #FermiParadox #Astronomy
(DIR) Post #B05cnzLhwWkgziGeLg by spaceflight@spacey.space
2024-04-29T19:51:00Z
0 likes, 0 repeats
Any civilisation 👽 reading our messages could be billions of years ahead of humans. “If so they will be vastly more powerful and may not see us as any more valuable than we see bacteria” https://www.theguardian.com/science/2016/sep/23/stephen-hawking-warns-against-seeking-out-aliens-in-new-film#SETI
(DIR) Post #B05cnzvVnPOMml1F9k by spaceflight@spacey.space
2024-05-01T19:20:42Z
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👽 “Look at the mess we made when #Covid hit. We’d be like headless chickens 🐓. We cannot afford to be ill-prepared, #scientifically, #socially, and #politically rudderless, for an event that could happen at any time and which we cannot afford to mismanage.” https://www.theguardian.com/science/2022/dec/29/if-aliens-contact-humanity-who-decides-what-we-do-next#SETI #Alien #Extraterrestrial #Contact
(DIR) Post #B05co10rkzGk9eX28m by spaceflight@spacey.space
2025-06-08T20:46:45Z
0 likes, 0 repeats
Number of #planets 🪐 discovered outside the #SolarSystem (5824) https://ourworldindata.org/grapher/cumulative-exoplanets-by-method#exoplanets #SETI #OurWorldInData
(DIR) Post #B05co1o8nmgUcTaNwe by spaceflight@spacey.space
2025-11-08T19:32:29Z
2 likes, 4 repeats
#Ocean 🌊 worlds, and the potentially #habitable ones among them, may be more common than scientists already thought. The researchers saw 10 to 1000 times more water 💧 than prior work had previously estimated. “There isn’t really a reasonable scenario where that much water is delivered by #comets ☄️" https://www.science.org/content/article/alien-worlds-may-be-able-make-their-own-water#astronomy #exoplanet
(DIR) Post #B05co4CJurDK22uiuW by spaceflight@spacey.space
2024-02-23T18:22:59Z
0 likes, 0 repeats
🔭 #Astronomers can see distant #galaxies better than the one that surrounds us, the #MilkyWay 🌌 https://www.washingtonpost.com/science/2024/02/20/radcliffe-wave-galaxy-structure/#Astronomy #Telescope
(DIR) Post #B05co5kO9g3kpzrReS by spaceflight@spacey.space
2024-04-20T08:01:21Z
0 likes, 0 repeats
Experiments show that even if only 1% of a cell’s 🦠 constituents are contained in a 15-μm ice grain, the #bacterial signatures would be apparent in the spectral 🔬 data. Cell densities in a typical ice grain of the most common size regime of 1 to 5 μm would be approximately 100 times higher than in the experiment https://www.science.org/doi/10.1126/sciadv.adl0849#SETI #Enceladus #EuropaClipper Cassini
(DIR) Post #B05coAqbC0zwehnyWe by spaceflight@spacey.space
2024-04-29T19:54:30Z
0 likes, 0 repeats
“How do you know we’re the only time there’s been a civilization on our own planet ? After a couple of million years, the chances are that any physical reminder of your civilization has vanished, so you have to search for things like sedimentary anomalies or isotopic ratios that look off.” https://www.scientificamerican.com/article/could-an-industrial-prehuman-civilization-have-existed-on-earth-before-ours/
(DIR) Post #B05coCYErFV3wLELBY by spaceflight@spacey.space
2025-05-30T12:29:00Z
0 likes, 0 repeats
The #Arecibo message* could be detected up to about 12,000 light-years away from the Earth which is nearly halfway to the galactic centre (the #MilkyWay 🌌 is 105,700 light-years in diameter and the #SolarSystem is 26,000 light-years from the galactic centre). However, since Arecibo message was broadcasted in 1974, it has travelled only about 50 light-years 📏 so far https://www.scientificeuropean.co.uk/sciences/space/how-far-human-civilisation-is-detectable-in-space* The message was aimed at #Messier13, about 25,000 light years from Earth https://en.wikipedia.org/wiki/Arecibo_message#SETI
(DIR) Post #B05coCxlKLutDVAiy8 by spaceflight@spacey.space
2025-06-13T15:09:44Z
0 likes, 0 repeats
Water 💧 may have been present as early as 100 million to 200 million years after the #universe came to be. "#Life could have originated much earlier than previously thought” https://www.smithsonianmag.com/science-nature/did-water-form-in-the-some-of-the-earliest-years-of-the-universe-180986670#SETI #Aliens
(DIR) Post #B05coE2PKZE6YCLwqe by spaceflight@spacey.space
2025-02-07T21:33:59Z
0 likes, 0 repeats
@VRubinObs is expected to come online later this year. #PlanetNine should be detectable by that #telescope 🔭 https://www.astronomy.com/science/does-planet-nine-existAn undiscovered #planet 🪐 isn’t the only possible explanation for the movements of #ETNOs. Gravitational effects could be caused by clusters of objects rather than one big one, or by a very distant small black hole ⚫ https://www.planetary.org/articles/is-planet-x-planet-nine-real#Astronomy #precision
(DIR) Post #B05coIqBTRQ5RjfkzQ by spaceflight@spacey.space
2025-09-10T15:25:20Z
0 likes, 0 repeats
#Enceladus’ subsurface ocean 🌊 has #hydrothermal vents on its seafloor. Enceladus’ ocean contains molecular hydrogen — which #NASA has called “candy for microbes” 🦠 — as well as other building blocks for life, Iike carbon dioxide and methane. It’s pretty similar to the conditions that allowed ocean life to propagate on early Earth. https://www.planetary.org/articles/where-are-the-ocean-worlds-in-our-solar-system#SpaceWater #SETI
(DIR) Post #B05coKSrR7x4Tym9ui by spaceflight@spacey.space
2025-07-18T22:44:58Z
0 likes, 0 repeats
A #Galactic Habitable Zone excludes stars too close to the galactic center. Our Sun is a nice distance away from the galactic center, about 28,000 light years. Keeping out of the way of the Galaxy’s spiral arms is another requirement of the Galactic #HabitableZone https://astrobiology.nasa.gov/news/galactic-habitable-zones/#NASA #astrobiology #SETI
(DIR) Post #B05coLZHKkgBuAmnYW by spaceflight@spacey.space
2025-05-16T17:13:23Z
0 likes, 0 repeats
"I feel it is unacceptable that we do not even fully understand our #SolarSystem, while 100 billion #planetary systems are in our Milky Way 🌌 galaxy alone, and 100 billion such #galaxies in the #universe. Before we try to understand #stars, galaxies, or the universe, we must first come to understand our own home: the solar system.” https://www.astronomy.com/science/have-astronomers-found-planet-nine#PlanetNine #Astronomy
(DIR) Post #B05coTXRhRy0cnzRoG by spaceflight@spacey.space
2025-06-16T20:34:27Z
0 likes, 0 repeats
Ordinary matter is composed of #baryons, which are the subatomic particles protons and neutrons needed to build atoms. About 76% 📊 resides in #intergalactic space, about 15% in #galaxy halos and the remaining 9% concentrated within #galaxies 🌌, primarily as #stars or gas. https://www.reuters.com/science/astronomers-locate-universes-missing-matter-2025-06-16#Astronomy