Elusive planet nine could be hiding in this place in the Solar System, scientists say

Discovering planet nine can help explain origin and evolution of Solar System, scientists say

The Independent

An advanced #extraterrestrial civilization could potentially detect ๐Ÿ”ญ signs of life on Earth. But the #scale of the #universe ๐ŸŒŒ is incredibly vast. Even at the speed of light, signals ๐Ÿ“ถ from #Earth ๐ŸŒ have only reached a very small portion of our #galaxy. https://newspaceeconomy.ca/2023/07/15/can-extraterrestrial-life-detect-us/

#SETI #FermiParadox #Astronomy

Can Extraterrestrial Life Detect Us?

In theory, an advanced extraterrestrial civilization could potentially detect signs of life on Earth. This article reviews a few ways that they might do so.

New Space Economy

Any civilisation ๐Ÿ‘ฝ reading our messages could be billions of years ahead of humans. โ€œIf so they will be vastly more powerful and may not see us as any more valuable than we see bacteriaโ€ https://www.theguardian.com/science/2016/sep/23/stephen-hawking-warns-against-seeking-out-aliens-in-new-film

#SETI

Stephen Hawking warns against seeking out aliens in new film

Beware responding to signals from far off stars, physicist tells viewers in Stephen Hawkingโ€™s Favorite Places โ€“ a virtual journey across the cosmos

The Guardian

๐Ÿ‘ฝ โ€œLook at the mess we made when #Covid hit. Weโ€™d be like headless chickens ๐Ÿ“. 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.โ€ https://www.theguardian.com/science/2022/dec/29/if-aliens-contact-humanity-who-decides-what-we-do-next

#SETI #Alien #Extraterrestrial #Contact

If aliens contact humanity, who decides what we do next?

Scientists setting up โ€˜post-detection hubโ€™ in Scotland are concerned humans would react โ€˜like headless chickensโ€™

The Guardian

Given the currently 5983 confirmed #planets ๐Ÿช https://exoplanetarchive.ipac.caltech.edu, the 100โ€“400 billion stars in the #MilkyWay ๐ŸŒŒ https://en.wikipedia.org/wiki/Milky_Way and 200 billion to 2 trillion #galaxies https://en.wikipedia.org/wiki/Galaxy in the observable ๐Ÿ”ญ #universe, do you expect #intelligent life exists

#SETI #exoplanets #FermiParadox

In the Universe
23.4%
In the Milky Way
54.7%
In our Solar System
4.7%
I know that I know nothing
17.2%
Poll ended at .
NASA Exoplanet Archive

Our so-called #radio bubble, which streams out in all directionsโ€”north and south, east and westโ€”thus measures just 200 light years in diameter. Thatโ€™s a flyspeck in a #galaxy ๐ŸŒŒ that measures 100,000 light years ๐Ÿ“ across and a #universe that is a staggering 94 billion light years https://time.com/6242921/why-extraterrestrials-havent-contacted-earth

#SETI #METI

Anyone Hoping for Aliens to Contact Earth Will Have to Wait Another 400 Years At Least

A new paper argues Earth's bubble of radio signals sent into the universe is still very small, and unlikely to have reached other life forms

Time

Unintentional "leaked signals" are millions-fold weaker than intentional #METI signals ๐Ÿ“ถ. Given the number of messages already sent to target stars https://en.wikipedia.org/wiki/Active_SETI#Transmissions, do you expect a reply

#DarkForest #SETI #FermiParadox #Extraterrestrial #DoctorWho

In my lifetime
10.8%
Until the time of my great-great-grandchildren
16.2%
Possibly after the next 1000 years
59.5%
As a measure to #exterminate all life on Earth
13.5%
Poll ended at .
Active SETI - Wikipedia

Only a fraction of the vast multidimensional parameter search space ๐ŸŒŒ has been explored so far โ€”a situation compared to searching for a needle in a #cosmic haystack. Either #technoemissions are sufficiently rare that none has illuminated Earth during the 65 yr of #SETI searches, or they have indeed intersected our planet but have so far eluded detection. Should the current commitment to the search for life elsewhere persist, a discovery ๐Ÿ“ก could be closer than ever https://iopscience.iop.org/article/10.3847/1538-3881/ae394b
Undetected Past Contacts with Technological Species: Implications for Technosignature Science

Undetected Past Contacts with Technological Species: Implications for Technosignature Science, Grimaldi, Claudio

#Earth ๐ŸŒ can be found on one of the #MilkyWayโ€™s ๐ŸŒŒ outlying spiral arms โ€“ the #Orion-Cygnus arm, sitting at a point roughly halfway from the #galactic centre to its outer rim. To reach either, youโ€™d have to travel about 25,000 lightyears https://www.skyatnightmagazine.com/space-science/where-earth-in-milky-way

Picture : https://commons.wikimedia.org/wiki/File:236084main_MilkyWay-full-annotated.jpg

#BreakthroughListen will scan the the skies ๐ŸŒŒ with the aid of the #MeerKAT Telescope ๐Ÿ”ญ*. They are targeting a million nearby stars โœจ https://www.dailymotion.com/video/x9xium4

* ๐Ÿ—บ๏ธ https://graphhopper.com/maps/?point=Karoo+Array+Telescope&layer=Esri+Satellite

#SETI #Extraterrestrial

Dailymotion

#BreakthroughListen : Join the search by harnessing your computer's ๐Ÿ’ป spare processing power http://seti.berkeley.edu

#SETI #Berkeley

Berkeley SETI