[Q&A] Hiding Earth from Aliens, Truth About Pyramids, Crashing Into a Black Hole

Can we make Earth invisible for possible alien invaders? What's the deal with the pyramids and their alignment to stars? Can an interstellar ship casually crash into a black hole? And what's the difference between cosmology and astronomy after all? 🔴 [Q&A+] No ads. Bonus question. For FREE https://patreon.com/universetoday 00:00 Start 00:27 [Rod Tolosa] Possible life on Venus 03:16 [abstractedaway] Heium-rich dwarf stars as techosignatures 04:00 [kenji] The truth about pyramids 06:25 [Jakub Polášek] Most interesting citizen science projects in astronomy/space field right now 07:21 [Osiris Mpg] Could an interstellar ship crash into a black hole? 08:34 [FunkyCritter] Will Earth's spin stop eventually? 09:12 [Keiichi S] Naked-eye nebula 11:03 [Nolan Mosley] LEO satellites and the ozone layer 13:11 [Nanp90] Making the Earth invisible for alienes 📺 VIDEO VERSION https://youtu.be/cuXXPrp3_PU 📰 GUIDE TO SPACE Newsletter No ads. Subscribe for FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Astronomy Cast: http://www.astronomycast.com/ 📩 CONTACT FRASER frasercain@gmail.com ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0)