Thanks to our friends at Babbel for sponsoring today's video! Start speaking a new language in 3 weeks with Babbel 🎉 Get up to 60% OFF your subscription ➡️ HERE: https://bit.ly/StarTalkAug What could we do to hide from the aliens? Neil deGrasse Tyson and comedian Chuck Nice answer fan questions about human radio wave signals, strange matter, universes inside black holes, and other physics questions! Could a spaceship constantly accelerate? We talk about retrorockets, the Equivalence Principle, and space fueling stations. Learn how the paths of projectiles don’t actually follow a parabolic arch. Plus, how do photons experience redshift while also being destroyed upon creation? Are we on the other side of another universe's black hole? What is the difference between the horizon of our universe and the event horizon? What is strange matter? We break down the types of quarks and the mysterious things in particle accelerators. Plus, learn where the word “quark” comes from. Do gas giants have a solid core made of different things than ours? Find out about the formation of the solar system, Maxwellian distribution of velocities, and how big Jupiter’s atmosphere is. We also explore human radio and TV signals and how we could encrypt our signals so aliens don’t hear us. How many cosmic discoveries are made by people with no formal training? Can enthusiasts still contribute to science? We also discuss what needs to be revised about the model for the start of our universe. Plus, learn how aliens received the wrong directions to our solar system. Timestamps: 0:00 - Introduction 1:04 - Accelerating to Mars 4:14 - The Equivalence Principle 6:00 - Fueling in Space 6:50 - Orbit 9:08 - Time Dilation & Photons 13:46 - Universes within Black Holes 16:32 - What is Strange Matter? 26:17 - Do Gas Giants Have a Solid Core? 31:21 - Can We Hide Earth from Aliens? 39:07 - Amateur Astronomers Making Discoveries Check out our second channel, @StarTalkPlus Get the NEW 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 About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson