Are Aliens Listening To Us?

Video Description

Neil deGrasse Tyson and Chuck Nice dive into cosmic puzzles: Gas giants vs. rocky worlds — Giant planets are mostly atmosphere with a tiny dense core; heavy elements sink while lighter gases like hydrogen and helium stay only if gravity is strong enough (thanks to Maxwell–Boltzmann speeds). Hiding from aliens — Early radio/TV broadcasts leaked into space, but today’s cable and encryption mean far less leakage. Perfect stealth would make signals indistinguishable from cosmic noise. Problem is, the Pioneer and Voyager plaques literally gave away Earth’s “return address.” From 'Answering Fan Queries About Strange Matter, the Insides of Black Holes & More': https://youtu.be/i7vGoILa5qk?si=X8WyLHbwZHAdozHm Get the StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk TikTok: https://www.tiktok.com/@neildegrassetyson