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? 09:12 [Keiichi S] Naked-eye nebula11:03 [Nolan Mosley] LEO satellites and the ozone layer13:11 [Nanp90] Making the Earth invisible for alienes📺 VIDEO VERSIONhttps://youtu.be/cuXXPrp3_PU📰 GUIDE TO SPACE NewsletterNo ads. Subscribe for FREE: https://universetoday.com/newsletter🎧 PODCASTSUniverse Today: https://universetoday.fireside.fm/Astronomy Cast: http://www.astronomycast.com/📩 CONTACT FRASER[email protected]⚖️ LICENSECreative Commons Attribution 4.0 International (CC BY 4.0)