A submarine that can dive through Titan’s
methane seas.
A celestial hopper that can harvest frozen
nitrogen as propellant.
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
design team at NASA behind them.
I'm Steve Oleson.
I run the NASA COMPASS team.
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?
How do you do it efficiently?
While the Constellation program was cancelled
by the Obama Administration, word got out
about COMPASS’s expertise.
This team can deliver a new spacecraft design
and scope the costs in just two weeks.
And it all starts with a wild idea.
A new technologist will bring their new power
system to us and say, "Here's a reactor.
I want to put it on the moon.
How would I package it?
How would I land it?
How would I operate it?"
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
submarines.
It's always something new, but we do about
16 designs a year.
Our mantra is, "Base it on physics."
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
process.
Imagine something flying through space has
to have obviously a structure to it.
It's going to need power.
You may be able to talk to it, right?
You have the science instruments that gather
data, so you got to send back the data with
a communication system.
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
is really the key.
I'm like the game show host.
One of my biggest roles is getting new creativity
out of people.
We often combine electric propulsion with
chemical propulsion, which one would think,
those are at odds with each other.
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?
That's the creativity.
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.
Titan is a wonderful place.
It has a very thick atmosphere.
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's those fascinating things to us.
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
its way through.
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
that can withstand those high temps.
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
that would power future missions.
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
to an asteroid by 2025.
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.
Bush said, "We're going back to the moon."
Then, of course, Obama came in and said, "We're
going to grab the asteroid, go to that."
Now, Trump is here.
Instead of grabbing the asteroid now, we're
going to basically send a crew to orbit the
moon.
The same vehicle that we came up with in 2012
is now the power propulsion element for the
Gateway.
A lot of things evolved, and a one-week study
evolved into now the power system and propulsion
system for what the astronauts are going to
ride on.
At the heart of all of these designs, the
COMPASS team enjoys the challenge.
They’re taking futuristic, sci-fi designs
and making them real.
Science fiction has led the way in a lot of
space exploration just with being able to
think out-of-the-box.
In fact, we have discussions on whether they're
a Star Wars fan or a Star Trek fan, right?
We all love those genres.
We grew up on them.Seeing science fiction
in the movies, reading the books, gives you
that mindset that anything is possible, and
that there are new worlds out there.
The COMPASS team is developing new concepts,
so the public can get a better window on all
these things, see these new, fascinating things
and maybe get a little better understanding
of maybe how unique we are or how unique we
aren't.
For more science documentaries, check out
this one right here.
Don't forget to subscribe and keep coming
back to Seeker for more videos.
