1,050 views

8:00

Watch
- Search Videos
  
  Advanced search »
- Submit a New Video
Discuss
About
- Try clicking on the various channels to see videos posted to that channel - if you're into music you can click the Music channel to get more music sifts - go on and explore! Use the "hotness" when you have opened the channel link to get videos that have gotten a lot of votes, or use "newness" to have a look at the new sifts.
  When browsing sifts you like, have a look at the Related Posts list to see other related videos, click the tags under the video title to see more sifts tagged with the same tags or have a look at other sifts from the same user in the More Posts By list. If the sifted video is in a play list, have a look at the play list to see other interesting videos the Sift users have linked together.
  Enter the Sift Lounge to chat with online sifters about anything and everything, or read interesting posts in the Sift Talk forum.
  The Top New Videos list is always full of interesting, current videos. It is always recommended that you have a look through the Top New Videos, but also have a look at these:
  - Upcoming Unsifted Videos - active video submissions that neither are published to the front page nor archived to the submitter's personal queue
- Have you seen a really funny, surprising, scary, interesting, cute or in any other way extra good quality video?
  Post and share it here - VideoSift is the best video aggregator on the Web, where we share, discuss, promote, and interact with the best videos out there on the web. Post it here, and share it with the large community of video-interested users. And - you are guaranteed to find more very good videos here already!
  Mind you, we only share videos you discover that someone else has made; if you "self link," by posting a video you have made, have posted or have interests in, you risk the ban hammer - read the posting guidelines before posting. The sift is NOT for promoting your own videos - it is for sharing videos others have made.
  Submit a Video Now »
Login

How Close Can You Orbit A Black Hole?

submitted by Aard Vark

(oritteropo)
7 years 11 months 3 weeks ago

One thing I should point out is that Mr. Manley consistently gets Karl Schwarzschild's name wrong. It's Schwarz Schild (black shield) and pronounced more like shield (except the d is a t sound and it's a shorter i sound than in English) and less like the pronunciation in the video.

YouTube description:

Black holes are weird. In particular the orbits as you get close don't behave like Keplerian orbits in Newtonian physics, which leads to many misunderstandings about how close you could get to a black hole. Many sci--fi writers make the mistake of presuming that the point of no return is the Event Horizon, when in fact there are limits even further out.