yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Why do planets orbit? (With Dan Burns)


less than 1m read
·Nov 10, 2024

The explanation for gravity is that matter bends space.

And so, you put mass in a place in space; it warps SpaceTime. Objects are not feeling a force of gravity; they're just following the natural curvature.

Um, and so you put matter and it warps SpaceTime. If I have another object, it also warps SpaceTime. They feel that, and they're attracted to each other.

And so that's Einstein's picture of gravity: objects warp SpaceTime, feel that curvature, and move accordingly.

You have more mass; it's going to bend SpaceTime more. And so if you have objects here, they are going to respond to that, right?

And so you put something there; now it's attracted. Well, instead of just letting go of one, what if I give it a sideways push?

Now it orbits. Now it's losing energy, which wouldn't happen in the solar system, right? Not noticeably.

There's some perturbations from other planets and things, but this one does lose energy and spirals in different directions.

But there was a preferred direction that distant formed from; it had a slight preference one way versus another.

And things going the opposite way got eliminated.

When it's all said and done, everything's going the same way.

More Articles

View All
Sal interviews the AP Calculus Lead at College Board | AP Calculus AB | Khan Academy
So this is Sal Khan, founder of the Khan Academy, and this is a very exciting Skype call that we’re on. I’m with Ben Hedrick, who’s the lead for AP Calculus. What do you do at the College Board? Uh, really anything with AP Calculus and AP Statistics is s…
Solving exponential equations using exponent properties | High School Math | Khan Academy
Let’s get some practice solving some exponential equations, and we have one right over here. We have (26^{9x + 5} = 1). So pause the video and see if you can tell me what (x) is going to be. Well, the key here is to realize that (26^0) is equal to 1. Any…
How To Deal With Setbacks
It’s like saying that you want to be a boxer, but like after you get really good at boxing, you’ll never have to take a punch again. It’s like, no, the sport, people, that’s the sport of the game we’re playing. All right, this is Michael Seibel with Dalt…
Navigating the High Cost of Housing | National Geographic
(traffic passing by) [Man] The hardest part was just kind of feeling like I was a failure. (building music) Why am I sleeping here with my kids in my car? (soft music) We’ve seen a great shift in the last few years as we came out of the recession where i…
$500 MILLION DOLLARS - Smarter Every Day 179
Five hundred million dollars— that’s a lot of money! If someone just handed you five hundred million dollars and said, “Here, go do something good for society,” what would you do? I don’t know if you know it, but society is kind of divided right now. It’s…
Finding Frozen Mummies in One of the World’s Tallest Mountain Ranges | Best Job Ever
It’s part of mankind to want to explore. You are tremendously curious about the world, and we want to understand it better. You can’t turn yourself off. [Music] I want to be able to go into any kind of environment, work with any kind of people. We reali…