12775 utenti della rete avevano questa curiosità: Spiegami: In space, if the ISS is traveling at 17,150 miles per hour how does it look so stationary in the video from the Dragon capsule. Also How does it dock so precisely when it is moving so fast.
Spiegami: In space, if the ISS is traveling at 17,150 miles per hour how does it look so stationary in the video from the Dragon capsule. Also How does it dock so precisely when it is moving so fast.
Ed ecco le risposte:
Why does it seem like that car infront of you isn’t moving when he’s doing 75 mph? Because you’re doing 75 mph.
Except the car infront of you is the ISS and you’re Crew Dragon.
It’s moving 17,150 mph relative to us, but what matters for docking is how quickly it’s moving relative to the ISS. We are completely irrelevant at that point. At the point of docking, they’re basically moving at the same speed relative to us, so their speed with respect to each other is basically 0. It’s like if you’re in a car and your friend’s car pulls up next to you. You guys can be driving as fast as you want, but you can still do things like pass stuff back and forth between the cars without having to take their speed relative to the road into account. This is basically the whole idea behind reference frames. In their view, it’s the road that’s moving quickly, and that’s perfectly valid. Neither of those reference frames us any more valid or right than the other. Physics is the same in both of them. That’s the beauty of relativity.
You can extend the same idea to the Earth. The Earth is orbiting the Sun, the Solar System is moving through the galaxy, the galaxy is moving in our local group, our local group is moving with respect to other clusters. That’s a ton of motion, but everything seems still here.
To my understanding, it’s all about relativity. Yes, the ISS is moving incredibly fast, but so is the dragon capsule. It’s kind of like if you’re running with a friend. You’re both moving quickly, but your friend won’t look like they’re moving fast, or at all, relative to your pace, if that makes sense. That’s why docking can be so precise. The ISS is moving very close to the same speed, so it’s not like the dragon capsule will go crashing through the space station. They’ll just start going the exact same speed. Source: Took physics and astronomy
If you are eating a cheesburger in your car traveling at 60 MPH, the cheeseburger is also traveling 60 MPH.
Now if someone throws a cheesburger into your mouth at 60 MPH, there can be problems.