Summary
Researchers from Columbia University propose a theoretical method for extraterrestrial civilizations to cloak their planets from detection. By utilizing lasers to fill in the missing starlight that occurs when a planet transits in front of its star, these civilizations could effectively hide their presence from observers. The study, published in the Monthly Notices of the Royal Astronomical Society, outlines how this cloaking device could be constructed with a power requirement comparable to that of solar arrays used in space.
The concept extends beyond mere invisibility; it could also manipulate atmospheric signatures to obscure biosignatures, such as oxygen and ozone, which are indicative of life. The researchers suggest that this technology could serve as a protective measure against potential threats from more advanced civilizations, echoing concerns raised by notable scientists like Stephen Hawking regarding the dangers of contact between differing technological societies.
Additionally, the same laser technology could be employed to signal one's existence to other civilizations by altering the shape of the transit signature, making it appear artificial. This dual capability raises important questions about the implications of revealing or concealing one's presence in the universe, highlighting the need for careful consideration of humanity's future interactions with potential extraterrestrial life.
Show Notes
NSF Graduate Fellow Alex Teachey of the Cool Worlds Lab explains our new paper which devises a method to cloak entire planets from extraterrestrial civilizations! This was a really fun little paper which started out from the idea of how to broadcast or signal our presence, but as we worked on it we realized it could also be used a cloaking device too. As always, ask us your questions in the comments below and we'll get back to you!::More about this Video::► Kipping & Teachey (2016): "A Cloaking Device for Transiting Planets" http://arxiv.org/abs/1603.08928► BBC article on Stephen Hawking's comments about avoiding alien contact: http://news.bbc.co.uk/2/hi/8642558.stm► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk::Playlists For Channel::Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorldsCool Worlds Research ► http://bit.ly/CoolWorldsResearchGuest Videos ► http://bit.ly/CoolWorldsGuestsQ&A Videos ► http://bit.ly/CoolWorldsQAScience of TV/Film ► http://bit.ly/ScienceMovies::Follow us::SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribeCool Worlds Lab http://coolworlds.astro.columbia.eduTwitter https://twitter.com/david_kippingInstagram https://www.instagram.com/cool.worldsTHANKS FOR WATCHING!! Learn more about your ad choices. Visit megaphone.fm/adchoices
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