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Tracy Drain

๐Ÿ‘ค Speaker
473 total appearances

Appearances Over Time

Podcast Appearances

Conversations
The giant spacecraft on its way to Jupiter's icy moon

Actually, the thing that gets us all the way out to Jupiter is more about the rocket that we use to launch off of the Earth and get out of the gravity well.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So we had the spacecraft flying.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

fold up its wings and sit on the top of a SpaceX Falcon Heavy launch vehicle.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

And that gets you going fast enough, but not actually enough to get all the way there.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So we had to play the game of solar system billiards where we went out and did a flyby of Mars to pick up a bit of velocity.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

And then we're actually coming back by the Earth on December 3rd of this year to get another gravity assist to give us our final kick to get going far enough out to.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So think of it this way.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

Here we are at the Earth, and Mars is also going in its orbit around the sun.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

You just have to go close enough to Mars, like graze its sphere of influence from a gravitational perspective.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

And so it's almost like as you get closer, gravity acts stronger.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So it's almost like you're holding hands with the planet, and it's going so fast that it slings you, and then you get a bit faster.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

Right.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

And so that makes our orbit bigger.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So we're in a bigger circular orbit, but then โ€“ not circular, elliptical โ€“ but then you come back by the Earth if you time it right.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

And you play the game with calculus and physics to know where the planets are going to be.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

So our orbit is โ€“

Conversations
The giant spacecraft on its way to Jupiter's icy moon

Kind of in a little elliptical orbit, and then we went by Mars.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

It puts us in a slightly different elliptical orbit, and then you head by the Earth, and that gets us in an even bigger one so that the end gets you all the way out to Jupiter.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

Sorry, your audience cannot see what I'm doing.

Conversations
The giant spacecraft on its way to Jupiter's icy moon

That's exactly right.