Name: How Mission Designers Invent Futuristic Spacecraft
Uploaded: 2020-03-25T02:13:32.000Z
Duration: 7 min 13 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

A submarine that can dive through Titan’s methane seas.

A celestial hopper that can harvest frozen nitrogen as propellant.

Relative clauses (Restrictive vs. nonrestrictive)

These are the types of futuristic spacecraft that could explore distant worlds for us.

But while they look straight from science fiction, there’s actually an in-house conceptual

COMPASS was begun in 2006 during the Constellation program.

We put the team together to basically design lunar landers.

How do you get people down to the surface?

While the Constellation program was cancelled by the Obama Administration, word got out

This team can deliver a new spacecraft design and scope the costs in just two weeks.

A new technologist will bring their new power system to us and say, "Here's a reactor.

To us, every new environment, every new place to go requires a new vehicle.

These vehicles, a lot of times, they are spacecraft, but there's other times, they're rovers and

It's always something new, but we do about 16 designs a year.

There could be technologies that needed to be developed.

We try to infuse those into our designs, but it's still something that is based on physics.

There are so many different spheres of expertise that go into designing a new spacecraft — like

propulsion, materials, software — and they’re all woven in simultaneously during the development

Imagine something flying through space has to have obviously a structure to it.

You have the science instruments that gather data, so you got to send back the data with

We have to have some kind of radiator, so the thermal systems keep us at the right temperature,

so that things don't get too hot, things don't get too cold.

Of course, propulsion to get us to stop or start or go wherever we want to go.

Finally, trajectories — so how do we get to there and get back again?

Ultimately though, we want to lay this whole thing out, so we have a computer configuration.

They look really great, and they could be feasible, but will it cost too much?

Is this something that's affordable for this approach?

We have people on the team to do all those things.

To get all of these team members to work together, they really need to think outside the box.

We do need them to know what the box is that they're trying to get out of, but communication

One of my biggest roles is getting new creativity out of people.

We often combine electric propulsion with chemical propulsion, which one would think,

But it turns out, chemical propulsion is really great when you're near a planetary body.

Electric propulsion is fantastic in deep space.

The technologies were already there, but how do you combine those together in a new way?

With all of these emerging discoveries, NASA’s problem isn’t trying to find places to go,

it’s figuring out which place to go first.

Except for the temperature, if I put you on Titan in a spacesuit, you could put on some

wings, and you could flap around and fly, because the gravity is so low, and the atmosphere

is so dense…. you can splash down in the sea and become a submarine.

So where do you even start when you have to conceptualize a submarine to float 1.27 billion

kilometers away on one of Saturn’s Moon.

The biggest challenge with the submarine was communications and basic going up and down.

A boat just has to float, so we did ballast systems.

The other big question was communications.

It turns out that the liquid methane is actually radio transparent.

Technically, if you have an orbiter above you, you can sit on the bottom, a kilometer

deep, and talk through all that liquid methane.

It looks like a regular submarine, but we've got a lot of different things, because the

environment, the physics are so different on that moon.

Compass’s spacecraft designs are based off of the limited data we have so far of these

worlds, and hopefully they’ll advance our understanding even further.

There's Europa with the 20 kilometers of ice and what could be below in the ocean.

We've designed a tunnel bot that would actually dig through there using a reactor to melt

For the Venus land-sailing rover, we basically came up with a design that has a wing that

you would just turn, and you would sail in the direction you want.

Again, the high temperature electronics are key to making that thing work.

Venus is a scorching 465 degrees Celsius, enough to melt most commercial electronics.

To get this land sail to cruise, a team of scientists are working on new integrated circuits

It's still in the conceptual design phases….You need to demonstrate the high temperature in

electronics first, and that's what we're doing with some demonstrations, working that now.

Once you get those, now you can start to explore.

Because Compass has to dream up the impossible, it pushes other teams to invent new technologies

And that has major benefits for us here on Earth.

A lot of things we've done have not flown yet, because it takes time.

One of the greatest things that we did was this thing called Fetch, which basically was

going to grab an asteroid, and we're talking something in, roughly, 10 meters diameter,

actually grab that with this bag and use electric propulsion to push it back.

This is one of the neatest things I think we've done, because this is completely out-of-the-box.

Can you actually grab an asteroid and move it back?

This project was part of Obama's Asteroid Retrieval Mission, which pledged to send astronauts

That mission was cancelled by Trump in 2017.

We have a joke here at NASA, that every solar cycle or 11 years or so, we switch from going

to Mars to the moon, and that's really what's happened.

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How Mission Designers Invent Futuristic Spacecraft

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