@BenHouston3D oh wow 🤩

@BenHouston3D This is so amazing. I wonder if it's possible to also visualize where/when burns occur, or what proportion of the Δv along this path comes from lunar/earth gravity vs fuel expenditure… if that makes any sense.

@BenHouston3D orbital mechanics is weird

@BenHouston3D just think of the maths involved in working this out!

@BenHouston3D This looks way more complex and far more interesting than the static images the BBC has been showing.

@BenHouston3D it’s pretty wild to watch this and think, “I technically know all of the math required to figure out how to do this, and yet, I never could put it together to do this.”

@BenHouston3D wow

@BenHouston3D That gravity assist to slow down after chasing the moon around its orbit for a bit is blowing my mind.

@BenHouston3D I love this so much. Thank you for sharing 🌈

@BenHouston3D #astronomy #Nasa hashtags help!

@BenHouston3D that's a really cool animation, thx!

@BenHouston3D aaand now I have to reinstall Kerbal

@BenHouston3D Physics are awesome!

@BenHouston3D The percision of this maneuver is neat because it confirms I am too stupid to work at NASA. Thanks for sharing.

@BenHouston3D as someone with >100 certified hours on KSP, I can confirm that this is how you do it

@BenHouston3D Very cool

This is so cool to see visualized.

@BenHouston3D

Here's the formula:
🛰️ + 🌛 + 🌎 = 🤯

@BenHouston3D Kinda looks like a crash landing. I hope it brought a parachute! 😅

@BenHouston3D orbital mechanics: it works.

@BenHouston3D
cc
@astrojuanlu

that second time where Artemis does the loop around the moon to change its trajectory to a perpendicular direction is amazing 👏 very elegant

Nunca me va a dejar de asombrar la locura que es la navegacion con gravedad como la que hace Artemis. Es como un reloj, pero mas grande..

@BenHouston3D

@BenHouston3D this is the kind of stuff NASA does expertly

@BenHouston3D Thanks, Ben, for sharing this!

I have been trying to find a graphic of the mission, and am blown away by how different this is from the old Apollo flight path.

@BenHouston3D Great illustration of orbital mechanics.

@BenHouston3D It's a thing of beauty. I will be working on my KSP recreation of this over the next few days, for sure! #KerbalSpaceProgram

@BenHouston3D Just like KSP.

@BenHouston3D how does it works?

@BenHouston3D @phocks Rich Parnell Sr is a steely-eyed missile man also

@BenHouston3D in awe of the orbital mechanics at work here and the computation that must lie behind it. Did any of the Apollo missions employ moves like this?

@BenHouston3D

That is *so* cool!

@BenHouston3D I like the way it literally just falls down to Earth

@BenHouston3D how does it decrease its speed enough on the way back? Does it have that much thrust?

@BenHouston3D

Wikipedia has both this animation and a side-by-side "elevation" animation to better illustrate how wildly 3d this flight is ... no doubt it's on NASA, too, somewhere.

https://en.m.wikipedia.org/wiki/Artemis_1#Mission_profile_animation

@BenHouston3D this is called gravity assist right?

@BenHouston3D I would *never* be able to pull this off in ksp

@BenHouston3D this makes me feel very inadequate about my Kerbal Space Program skills

@BenHouston3D Fantastic graphic. Is it my imagination or does Artemis slow down on its first approach to the moon? That seems pretty weird. But then orbital mechanics is all weird, right 😃

@BenHouston3D
Amazing! Had to watch that 3 times before I completely understood it.

@BenHouston3D neato 🌯

@BenHouston3D for those that haven’t tried it the app ‘space flight simulator’ allows you to model how real space dynamics work. Taught me a lot in understand how these orbital dynamics work (yes and without the maths 😀)

@BenHouston3D No doubt even more spectacular in 3D...

@BenHouston3D I wasn't expecting such sharp corners, when the speed drops to almost nothing.

@BenHouston3D the last moon encounter needs a *BONK* noise

@BenHouston3D They are using the Oberth effect in what is called a powered fly-by maneuver or also an Oberth maneuver. This means that with the same amount of momentum change (i.e. consumed fuel) it is possible to gain/lose much more kinetic energy, when being deep in a gravitational well (of the moon in this case).

@BenHouston3D

I couldn't get my head around the static earth and moving moon model, I needed this diagram!

@BenHouston3D #space is awesome!

@BenHouston3D Awesome video. Would be cool to show an inset centered on the moon, to show the sphere of influence shift.

@BenHouston3D amazing

@BenHouston3D Thats a very creative solution. The acceleration, deceleration into an outside-track orbit and re-acceleration into re-interception is a set of maneuvers I never would have dreamed of.

It makes me wonder how it was conceived. It reminds me of AI systems that are given a task to cross a chasm, so the AI just grows longer legs.

Does NASA use AI to come up with trajectory solutions?

@BenHouston3D this is so cool. Feels like space magic ... probably because the dots are, obviously, not quite to scale!

@BenHouston3D the three body solution

@BenHouston3D that is so cool. Then I see the pink dot go outside the green circle and I think, what if they just go flying off into space? They definitely need to get it right haha. Good thing there are people working there that are smarter than me

@BenHouston3D I'm in awe of the people who calculated these kinds of trajectories without the aid of computers back in the 60's and 70's.

@BenHouston3D I wonder how often this can be done before slowing the moon down ;)

@BenHouston3D Just amazing that we can calculate a trajectory like this in advance

@BenHouston3D
Really amazing.
So … space travel is run by the world’s most advanced pool players?

@BenHouston3D Rocket science! I studied astrophysics many years ago. There's some interesting math in there.

@BenHouston3D Dang Newton and his crazy laws…

@BenHouston3D
@andreasdotorg
Oh, that is a lovely way to do it

@BenHouston3D That's pretty damn slick!

@BenHouston3D That is one heck of a spirograph.

@BenHouston3D. Indeed amazing!