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Can weak plasma rockets get us to Mars? | Gary Li | TEDxUCLA


this is me sitting next to the Saturn 5

this is me sitting next to the Saturn 5 rocket at the NASA Johnson Space Center

rocket at the NASA Johnson Space Center

rocket at the NASA Johnson Space Center now I don’t think this picture does the

now I don’t think this picture does the

now I don’t think this picture does the Saturn 5 justice because you can’t see

Saturn 5 justice because you can’t see

Saturn 5 justice because you can’t see all the amazing things that it’s

all the amazing things that it’s

all the amazing things that it’s accomplished

accomplished

accomplished the Saturn 5 was the only rocket to have

the Saturn 5 was the only rocket to have

the Saturn 5 was the only rocket to have ever gotten humans to the moon and it

ever gotten humans to the moon and it

ever gotten humans to the moon and it still holds a record as being the most

still holds a record as being the most

still holds a record as being the most powerful rocket ever built

powerful rocket ever built

powerful rocket ever built well it really amazed me was how large

well it really amazed me was how large

well it really amazed me was how large this rocket really was in person I mean

this rocket really was in person I mean

this rocket really was in person I mean literally took up this entire hangar the

literally took up this entire hangar the

literally took up this entire hangar the size of a football field but Rockets

size of a football field but Rockets

size of a football field but Rockets weren’t always this big here’s a look at

weren’t always this big here’s a look at

weren’t always this big here’s a look at a few rockets from the past with the

a few rockets from the past with the

a few rockets from the past with the Statue of Liberty there to give you a

Statue of Liberty there to give you a

Statue of Liberty there to give you a scale for how large Rockets really are

scale for how large Rockets really are

scale for how large Rockets really are now the smallest rocket here was

now the smallest rocket here was

now the smallest rocket here was actually the very first to get us into

actually the very first to get us into

actually the very first to get us into space but just getting the space wasn’t

space but just getting the space wasn’t

space but just getting the space wasn’t enough for us we want to travel further

enough for us we want to travel further

enough for us we want to travel further from the edges of the atmosphere to the

from the edges of the atmosphere to the

from the edges of the atmosphere to the moon and beyond and then we want to send

moon and beyond and then we want to send

moon and beyond and then we want to send heavier cargo like humans or even space

heavier cargo like humans or even space

heavier cargo like humans or even space stations so to meet all these challenges

stations so to meet all these challenges

stations so to meet all these challenges we to build these Rockets bigger and

we to build these Rockets bigger and

we to build these Rockets bigger and stronger over time until eventually we

stronger over time until eventually we

stronger over time until eventually we got to the Saturn 5 a rock is so big we

got to the Saturn 5 a rock is so big we

got to the Saturn 5 a rock is so big we get humans to the moon and back now

get humans to the moon and back now

get humans to the moon and back now today we’re looking beyond the moon to

today we’re looking beyond the moon to

today we’re looking beyond the moon to an even more ambitious goal sending

an even more ambitious goal sending

an even more ambitious goal sending humans to Mars Mars is over 200 times

humans to Mars Mars is over 200 times

humans to Mars Mars is over 200 times further away than the moon so humans

further away than the moon so humans

further away than the moon so humans will need a massive amount of cargo if

will need a massive amount of cargo if

will need a massive amount of cargo if they want to survive the journey there

they want to survive the journey there

they want to survive the journey there and back so NASA is now building an even

and back so NASA is now building an even

and back so NASA is now building an even larger rocket called the Space Launch

larger rocket called the Space Launch

larger rocket called the Space Launch System or SLS for short the SLS delivers

System or SLS for short the SLS delivers

System or SLS for short the SLS delivers a second rocket into space which is what

a second rocket into space which is what

a second rocket into space which is what ultimately takes you and your cargo to

ultimately takes you and your cargo to

ultimately takes you and your cargo to Mars now I hope that you can see that

Mars now I hope that you can see that

Mars now I hope that you can see that throughout history we’ve just made

throughout history we’ve just made

throughout history we’ve just made Rockets bigger and stronger to solve all

Rockets bigger and stronger to solve all

Rockets bigger and stronger to solve all our problems and it’s worked out pretty

our problems and it’s worked out pretty

our problems and it’s worked out pretty well for us so far we’ve even landed

well for us so far we’ve even landed

well for us so far we’ve even landed humans on the moon but today we finally

humans on the moon but today we finally

humans on the moon but today we finally hit a ceiling even the gigantic SLS

hit a ceiling even the gigantic SLS

hit a ceiling even the gigantic SLS won’t be able to deliver the massive

won’t be able to deliver the massive

won’t be able to deliver the massive amount of cargo that we need for getting

amount of cargo that we need for getting

amount of cargo that we need for getting means to Mars and it’s just not feasible

means to Mars and it’s just not feasible

means to Mars and it’s just not feasible to build a rocket even larger than this

to build a rocket even larger than this

to build a rocket even larger than this so what we need to do is think of a

so what we need to do is think of a

so what we need to do is think of a different approach and that’s the focus

different approach and that’s the focus

different approach and that’s the focus of my talk today I want to share with

of my talk today I want to share with

of my talk today I want to share with you a new rocket technology that’s

you a new rocket technology that’s

you a new rocket technology that’s revolutionising the way we travel in

revolutionising the way we travel in

revolutionising the way we travel in space for the past three years at the

space for the past three years at the

space for the past three years at the UCLA plasma and space propulsion lab

UCLA plasma and space propulsion lab

UCLA plasma and space propulsion lab I’ve been researching thousand Rockets

I’ve been researching thousand Rockets

I’ve been researching thousand Rockets plasma rockets are fundamentally

plasma rockets are fundamentally

plasma rockets are fundamentally different than the conventional ones

different than the conventional ones

different than the conventional ones that we’ve been talking about which are

that we’ve been talking about which are

that we’ve been talking about which are known as chemical rockets because

known as chemical rockets because

known as chemical rockets because instead of creating chemical explosions

instead of creating chemical explosions

instead of creating chemical explosions they create plasmas which are basically

they create plasmas which are basically

they create plasmas which are basically gasses compose the positively charged

gasses compose the positively charged

gasses compose the positively charged particles called ions and negatively

particles called ions and negatively

particles called ions and negatively charged particles called electrons by

charged particles called electrons by

charged particles called electrons by shooting these ions out the back your

shooting these ions out the back your

shooting these ions out the back your rocket can move forward very efficiently

rocket can move forward very efficiently

rocket can move forward very efficiently now the main downside to this technology

now the main downside to this technology

now the main downside to this technology is that plasma rockets are extremely

is that plasma rockets are extremely

is that plasma rockets are extremely weak now they’re barely strong enough to

weak now they’re barely strong enough to

weak now they’re barely strong enough to even lift up a single piece of paper and

even lift up a single piece of paper and

even lift up a single piece of paper and that’s just seemed bizarre to you

that’s just seemed bizarre to you

that’s just seemed bizarre to you because you typically associate rockets

because you typically associate rockets

because you typically associate rockets with being explosive and powerful

with being explosive and powerful

with being explosive and powerful well plasma rockets are exactly the

well plasma rockets are exactly the

well plasma rockets are exactly the opposite they’re so weak they can’t even

opposite they’re so weak they can’t even

opposite they’re so weak they can’t even lift themselves off the surface of the

lift themselves off the surface of the

lift themselves off the surface of the earth and that means they can only be

earth and that means they can only be

earth and that means they can only be used in space that also means we still

used in space that also means we still

used in space that also means we still need the old chemical rockets for

need the old chemical rockets for

need the old chemical rockets for launching off the earth so with this in

launching off the earth so with this in

launching off the earth so with this in mind how can Rockets this week even be

mind how can Rockets this week even be

mind how can Rockets this week even be useful to us well plasma rockets have

useful to us well plasma rockets have

useful to us well plasma rockets have one big thing going for them they can be

one big thing going for them they can be

one big thing going for them they can be as much as 10 times more fuel efficient

as much as 10 times more fuel efficient

as much as 10 times more fuel efficient than traditional chemical rockets so

than traditional chemical rockets so

than traditional chemical rockets so let’s take a second to understand what

let’s take a second to understand what

let’s take a second to understand what fuel efficiency really means I’m sure

fuel efficiency really means I’m sure

fuel efficiency really means I’m sure that most of you already know that a

that most of you already know that a

that most of you already know that a Prius is much more fuel efficient than a

Prius is much more fuel efficient than a

Prius is much more fuel efficient than a big rig well plasma rockets are

big rig well plasma rockets are

big rig well plasma rockets are basically the Priuses of space

basically the Priuses of space

basically the Priuses of space while these chemical rockets are your

while these chemical rockets are your

while these chemical rockets are your big rigs but what does this have to do

big rigs but what does this have to do

big rigs but what does this have to do with sending cargo to Mars

with sending cargo to Mars

with sending cargo to Mars well let’s compare these two Rockets

well let’s compare these two Rockets

well let’s compare these two Rockets assume that they’re about the same size

assume that they’re about the same size

assume that they’re about the same size and mass and for simplicity composed of

and mass and for simplicity composed of

and mass and for simplicity composed of only cargo and fuel the chemical rocket

only cargo and fuel the chemical rocket

only cargo and fuel the chemical rocket requires an enormous amount of fuel to

requires an enormous amount of fuel to

requires an enormous amount of fuel to deliver a relatively small amount of

deliver a relatively small amount of

deliver a relatively small amount of cargo I told you in the beginning that

cargo I told you in the beginning that

cargo I told you in the beginning that this amount wasn’t enough now the plasma

this amount wasn’t enough now the plasma

this amount wasn’t enough now the plasma rocket on the other hand requires less

rocket on the other hand requires less

rocket on the other hand requires less fuel allowing to take significantly more

fuel allowing to take significantly more

fuel allowing to take significantly more cargo and that bonus cargo is exactly

cargo and that bonus cargo is exactly

cargo and that bonus cargo is exactly what you need if you want to get humans

what you need if you want to get humans

what you need if you want to get humans to Mars so somehow a weak plasma rocket

to Mars so somehow a weak plasma rocket

to Mars so somehow a weak plasma rocket can deliver more cargo than a powerful

can deliver more cargo than a powerful

can deliver more cargo than a powerful chemical rocket how does that make sense

chemical rocket how does that make sense

chemical rocket how does that make sense you don’t only see people moving cargo

you don’t only see people moving cargo

you don’t only see people moving cargo with Priuses right well that’s because

with Priuses right well that’s because

with Priuses right well that’s because transportation in space is very

transportation in space is very

transportation in space is very different from transportation here on

different from transportation here on

different from transportation here on earth in space you’re not chained to the

earth in space you’re not chained to the

earth in space you’re not chained to the ground by gravity you’re basically

ground by gravity you’re basically

ground by gravity you’re basically floating so plasma rocket can be weak

floating so plasma rocket can be weak

floating so plasma rocket can be weak and still move very heavy objects and

and still move very heavy objects and

and still move very heavy objects and that’s why the plasma rockets fuel

that’s why the plasma rockets fuel

that’s why the plasma rockets fuel efficiency is the deciding factor for

efficiency is the deciding factor for

efficiency is the deciding factor for moving heavier cargo to Mars

moving heavier cargo to Mars

moving heavier cargo to Mars now moving cargo to Mars isn’t the only

now moving cargo to Mars isn’t the only

now moving cargo to Mars isn’t the only thing that plows are kids can do of

thing that plows are kids can do of

thing that plows are kids can do of course they can even get you to Mars

course they can even get you to Mars

course they can even get you to Mars faster than a chemical rocket now how

faster than a chemical rocket now how

faster than a chemical rocket now how does that make sense because how does a

does that make sense because how does a

does that make sense because how does a weaker rocket beat a more powerful one

weaker rocket beat a more powerful one

weaker rocket beat a more powerful one in a race or in other words how does the

in a race or in other words how does the

in a race or in other words how does the space tortoise beat the hare let’s all

space tortoise beat the hare let’s all

space tortoise beat the hare let’s all goes back to the original idea of fuel

goes back to the original idea of fuel

goes back to the original idea of fuel efficiency the chemical rocket requires

efficiency the chemical rocket requires

efficiency the chemical rocket requires use up its fuel very quickly so it can

use up its fuel very quickly so it can

use up its fuel very quickly so it can give a spacecraft one explosive push to

give a spacecraft one explosive push to

give a spacecraft one explosive push to send it to Mars and this one push does

send it to Mars and this one push does

send it to Mars and this one push does give it the speed that it needs to get

give it the speed that it needs to get

give it the speed that it needs to get there but the problem is after you run

there but the problem is after you run

there but the problem is after you run out of fuel you still have to cruise

out of fuel you still have to cruise

out of fuel you still have to cruise through space for at least six months

through space for at least six months

through space for at least six months before arriving and that’s a pretty long

before arriving and that’s a pretty long

before arriving and that’s a pretty long time

time

time now these plasma rockets on the other

now these plasma rockets on the other

now these plasma rockets on the other hand don’t have the same limitations

hand don’t have the same limitations

hand don’t have the same limitations because they’re more fuel-efficient they

because they’re more fuel-efficient they

because they’re more fuel-efficient they can slowly and steadily push you for a

can slowly and steadily push you for a

can slowly and steadily push you for a longer period of time and you can

longer period of time and you can

longer period of time and you can imagine that if you speed up fast enough

imagine that if you speed up fast enough

imagine that if you speed up fast enough you can actually pass the chemical

you can actually pass the chemical

you can actually pass the chemical rocket and get there even quicker

rocket and get there even quicker

rocket and get there even quicker studies have already shown that future

studies have already shown that future

studies have already shown that future plasma rockets could get you there and

plasma rockets could get you there and

plasma rockets could get you there and as little as a few weeks and we’re well

as little as a few weeks and we’re well

as little as a few weeks and we’re well on our way to getting to that point but

on our way to getting to that point but

on our way to getting to that point but the main idea here is that these

the main idea here is that these

the main idea here is that these chemical rockets that we’re using today

chemical rockets that we’re using today

chemical rockets that we’re using today have this hard sealing of a six-month

have this hard sealing of a six-month

have this hard sealing of a six-month travel time that’s the best we can do

travel time that’s the best we can do

travel time that’s the best we can do while these plasma rockets have the

while these plasma rockets have the

while these plasma rockets have the potential to break through that ceiling

potential to break through that ceiling

potential to break through that ceiling and get there significantly faster and

and get there significantly faster and

and get there significantly faster and this means everything for astronauts and

this means everything for astronauts and

this means everything for astronauts and future passengers like you or me

future passengers like you or me

future passengers like you or me but my otherwise died of radiation

but my otherwise died of radiation

but my otherwise died of radiation poisoning or even extreme boredom paws

poisoning or even extreme boredom paws

poisoning or even extreme boredom paws and rocket technology is only improving

and rocket technology is only improving

and rocket technology is only improving with time one day we’ll be able to send

with time one day we’ll be able to send

with time one day we’ll be able to send heavier spacecraft anywhere in the solar

heavier spacecraft anywhere in the solar

heavier spacecraft anywhere in the solar system and get them there faster so you

system and get them there faster so you

system and get them there faster so you can just imagine the possibilities we

can just imagine the possibilities we

can just imagine the possibilities we can have an interplanetary taxi chilling

can have an interplanetary taxi chilling

can have an interplanetary taxi chilling humans between the Earth and Mars in

humans between the Earth and Mars in

humans between the Earth and Mars in just a few weeks or even send Space

just a few weeks or even send Space

just a few weeks or even send Space Station’s to orbit around the moons of

Station’s to orbit around the moons of

Station’s to orbit around the moons of Jupiter when NASA thinks there might be

Jupiter when NASA thinks there might be

Jupiter when NASA thinks there might be life and this is just not possible with

life and this is just not possible with

life and this is just not possible with the chemical rockets we have today so

the chemical rockets we have today so

the chemical rockets we have today so you can already see that plasma rockets

you can already see that plasma rockets

you can already see that plasma rockets are just beginning to revolutionize the

are just beginning to revolutionize the

are just beginning to revolutionize the way we travel in space and now I want

way we travel in space and now I want

way we travel in space and now I want take a step back so we can look at the

take a step back so we can look at the

take a step back so we can look at the bigger picture because they’re more fuel

bigger picture because they’re more fuel

bigger picture because they’re more fuel efficient a weak plasma rocket can

efficient a weak plasma rocket can

efficient a weak plasma rocket can deliver more cargo than a powerful

deliver more cargo than a powerful

deliver more cargo than a powerful chemical rocket and as a bonus I can

chemical rocket and as a bonus I can

chemical rocket and as a bonus I can even get you to Mars faster so I hope

even get you to Mars faster so I hope

even get you to Mars faster so I hope that this shows you that a weak rocket

that this shows you that a weak rocket

that this shows you that a weak rocket can do incredibly useful things in space

can do incredibly useful things in space

can do incredibly useful things in space and none of this would have been

and none of this would have been

and none of this would have been possible without a major change in

possible without a major change in

possible without a major change in perspective maybe bigger and stronger is

perspective maybe bigger and stronger is

perspective maybe bigger and stronger is not always better because in the right

not always better because in the right

not always better because in the right situations sometimes something weak can

situations sometimes something weak can

situations sometimes something weak can do unexpectedly powerful things it could

do unexpectedly powerful things it could

do unexpectedly powerful things it could even bring us to Mars

even bring us to Mars

even bring us to Mars [Applause]

”

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