How Can Gravity Trap Light?

How can gravity trap light if light has no mass? In this video, we explore how curved spacetime bends light, why compactness matters, and what changes as we move from Earth and the Sun to neutron stars and black holes. From gravitational lensing and photon spheres to event horizons and black hole shadows, this is how gravity can make light disappear. WATCH ANOTHER VIDEO: Why Gravity Bends Spacetime https://www.youtube.com/watch?v=TUU-7U3bqQQ Ways to support us - Join this channel to get access to the perks: https://www.youtube.com/channel/UCdgpfQ5snGKcP-eqoVXI0pw/join - Check out our merch https://www.cosmoknowledge.com - Donate https://www.buymeacoffee.com/cosmoknowledge ---- Website ► https://cosmoknowledge.com/ Instagram ► https://www.instagram.com/itscosmoknowledge Facebook ► https://facebook.com/cosmoknowledge TikTok ► https://www.tiktok.com/@cosmoknowledge X ► https://x.com/cosmoknowledge A Cosmoknowledge production. Graphics: NASA/JPL-Caltech NASA/JPL-Caltech/R. Hurt (IPAC) Space Telescope Science Institute's Office of Public Outreach NASA's Goddard Space Flight Center/Clare Skelly Music: Dust Turns to Gold Tickle Slipping Cork Behind the Curtain Those Moments A big thank you to our lovely channel members: @feetxxxl @wantedanesthesiologist @THEGREATHYPERION @MrWfisher @dukedematteo1995 @davisgreen2099 @davidray9700 @kimberlytrue7183 @ahmetdiriker4311 @user-vj4qb8tu4z @IbelieveinValhalla @FirstLast-j9n @Asha1947 @sarahhoward3971 @ConstantinHarcota-p3u @Blasaint143 @jamesditto6285 @SWEETSHERENE1 @nathanrichardson2314 @KayBlakeney-g9w @bethkasser2516 @Ghost1127_ASK_NoGo @MikeWood-g2w @Skoney710 - Cosmoknowledge brings news from space. We love you, explorers!