Instructional Video11:22
PBS

What Happens at the Event Horizon?

12th - Higher Ed
What really happens when you approach the event horizon of a black hole?
Instructional Video8:16
PBS

Can a Circle Be a Straight Line?

12th - Higher Ed
On this week's episode of Spacetime, Gabe talks about what it actually means for a line to be straight so we can better understand what we mean by the idea of "curved Spacetime". This is Part One of our series on General relativity, so...
Instructional Video9:23
PBS

Can You Trust Your Eyes in Spacetime?

12th - Higher Ed
Last time we talked about what curvature means, looked at geodesics, great circles on spheres, and tried to understand the notion of "straightness". This week on Spacetime, we take a detour into how geometry works in spacetime. Get...
Instructional Video10:50
Astrum

Could the Universe Be Larger than Infinity?

Higher Ed
Is the universe flat, spherical or hyperbolic?