Why We Should Launch Rockets From the Moon
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- čas přidán 25. 06. 2024
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Half a century ago, astronauts got on top of a really big rocket and sent a tiny little capsule on a 384,000 km trip to the moon and back. And they were able to do it because a lot of extremely smart and dedicated people pushed engineering and chemistry to the limits in order to create a 36-story tower of carefully-controlled space fire powerful enough to escape Earth’s gravity. I went to NASA in Houston to talk to astronaut Don Pettit about how they did it, and if we’ll be able to do it again.
Special thanks to Don Pettit and NASA
Special thanks to our Brain Trust Patrons:
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Launching big tubes of space fire is hard. I’m grateful to my favorite astronaut Don Pettit for explaining the physics of the rocket equation to me in simple terms that my biologist brain could handle 🤓
Is that at the background a Voltron toy? You definitely have a taste, speaking of cartoons.
Could the engines affect leaving planets and moons?
But just going to the Moon would require every rocket sent there to climb the Earth’s gravitational well. Would the benefit come from continuous missions where the rocket left off and returned to the Moon?
Does joe also work in scishow? Or am i mistaking
Ur suggestion is illegal by the world government just fyi
That comment just struck me: "it takes three to five days to get to the moon." Just nonchalant 3-5 days. Imagine telling that to Columbus.
Yeah guy had to wait for months just to reach another continent. Now we get to the moon in 3-5 days. Really explains how far we've come.
right
It takes four hours if you push at just 1g and do a turnover halfway and break at 1g.
Putting things to perspective is 'tight.
GL hf with the Artemis program.
I want us to industrialize the moon A.S.A.P.
Thanks.
📡🧙♂️🐺🌹🌚🌍
Love.
@@praneelgogoi7769 He never believed that he found a different landmass, he was as stubborn, stupid, and awful, as is famous now.
Maybe if you don't go fast enough to the moon, then it consumes too many resources (such as breathable air, which Columbus had an endless supply of).
"I was told there would be no math"
Well, this is literally rocket science...
TWA FTW
do you even ksp bro
haha
Its OK to be dumb it's not rocket science .
Caught a couple “being cool by being dumb” comments. 😔
"The sky is not the limit!"
I like that.
"But gravity does"
Yep, the limit is much closer than that.
@@dayrkflaugh I like that
Flatties punching air right now
prefect
That one missing tail section on that dinosaur model is gonna bug me all day.
It fell behind the bookshelf (which is anchored to the wall) 🤦♂️
Do u have ocd
I hate your pfp, idk why I tried to click on it
@@samarnadra this comment deserves so many more likes
@Shibu Thomas
That's not what OCD is.
I can't handle the amount of freakin mIND-BLOWING INFORMATION IN THIS VIDEO !!!!! JOE, HECK
As a Texan, I love how you're clearly at a Buc-ee's when filling up your car.
Lol
I said the same thing
Kids, the sky is not the limit
.
.
But Gravity *Is*
Paraphrased from Joe Hansen
Correct
I too watched the video.
@@imveryangryitsnotbutter it was strong, they get a pass
well gravity is not the limit either. because we can send things to space! while it may take lots of resources, we can do so many things to make it so we use less resources! however it would also take lots of resources to make those things. it would also take way more to get those things functioning.
also i was the only person who disliked this post.
i see a video about something called boob lights? just wanted to say that
Also: "Kids, don't use random capital letters."
"We've been to space! I can't even believe we have to do this!"
I can't stop laughing...because science! I want a D.A.F.E. shirt.
LOL
🤣🤣🤣🤣
(Edited for misquote)
what... did you just say? i literally understood nothing about what you just said.
@@dogvader Just watch the video to the end
Where can I get that shirt- cannot find it online!
@@mikefelber5129 Check the description for Merch
Don't acknowledge....FE
Ignore or disregard... ?
Hmmm.
Get yourself a partner that looks at you the way Joe looks at Don.
I wish my wife would look at me like that
You wouldn't want to leave those two alone in a spacecraft for more than 2 orbits.
@@dahawk8574 lmao...
Agree.
Better yet if you also look at them the same way.
“We’re already pretty good at engineering planes”
*meanwhile at Boeing*
...
@Hyperbeeno perfect answer both fact are true
they are really good but too greedy for is own sake
They are actually not bad at it, greed just took over..
Ride in a 747 you'll see what I'm saying
@@EuriEuropa yes but they can make a software for that plane and now thay are in that position with zero confidence
Lmao
Perhaps, but what percent of even that one model (they make many models and have been doing so for many decades) plane's flights resulted in a crash? I mean, when they "grounded" them, every single one was flown to Seattle without incidence.
I think everyone keeps forgetting that this needs an industrial scale energy and resource infrastructure built on the freaking moon...
Even Elon Musk said the Moon is useless.
And a lot of fuel taken up. The benefit would be a more efficient ship/payload could be launched like that.
@CL Melonshark I can't find the quote, but I do remember him saying it when ask why he was focused on Mars and not the Moon. He only switched to the moon when the US administration made it clear that is what they are willing to fund. So he'll have to go there to keep NASA grants flowing while getting to Mars on his own money.
charlidog2 fuel would be created on the moon......
@@RobOfTheNorth2001 oh so now he goes for the Moon. Well at least he is going for the Moon, but do recalled people criticizing me on what Elon Musk said about the Moon. I may not know Rocket science, but I was aware that the Moon is important for Space travel, and this video prove my critism.
I love how Joe told us to not get scared by a mathematical equation. I wish my physics teacher can do that too.
The bit starting at 0:38 was not entirely accurate. Joe points only to the CM (Command Module), but the CM, the SM (Service Module), and the LM (Lunar Module) all went to the moon. The CM and SM came back to earth (as did the LM ascent module for Apollo XIII). The SMs for every Apollo mission all returned to earth and burned up during re-entry.
The graphic at 3:48 shows all these parts as part of the "1%", though.
This indicates that 99% of the mass was needed to get the final percent into a trans-lunar trajectory.
The service module was sufficient to brake into lunar orbit and re-accelerate into a trans-Earth trajectory.
I wonder what percent of mass was the command module?
I would do a little online research myself ... it's just that I'm really high right now
khrdina,
Joe's exact quote is "...to the Moon and back."
We could extend to him the benefit of doubt and interpret his word "back" as meaning "returning safely BACK to the surface of the Earth". With that easy to make interpretation, it is perfectly accurate to state that the entire Saturn V accomplished the safe return to Earth of only the CM. Absolutely no other part of the rocket got back to Earth safely.
It's accurate. The capsule is the only bit that comes back.
To deeper your rocket knowledge, you can go to Everyday Astronaut and Scott Manley's channel.
Or just download KSP
@@vinos1629 That's Kerbal Space Program for those who don't know.
My first thought after watching this was: If the Earth was 10%-15% larger we couldn't have a space program, does that mean if the Moon wasn't knocked off of Earth by that meteor we would be too large for space travel?
I suppose even if we weren't too large not having a moon would cause loads of other issues, but that was my first thought.
probably. elon musk has said that if the earth was just a bit smaller ssto would be feasible, and a bit larger and we would need a super heavy rocket to get a small load to orbit.
@@geohiekim8705 And yet Musk still doesn't seem to get that Mars' much smaller gravity well means it'll never be able to hold an atmosphere thick enough to be terraformed.
@@vituperation doesn't need one, Humans can live comfortably at pressures of 75% sea level.
@@vituperation You don't seem to get that going to Mars is not about terraforming. It's about finding humanity a new home and a way to get there before the sun vaporises Earth...and Mars.
@@kirkc9643 that won't happen for a billion years. Our biggest problem right now is that we are slowly turning earth into Venus. There's only so much pollution and co2 the atmosphere can take before it turns into a runaway greenhouse effect. And there's no reversing it when that happens. At this rate, within a couple hundred years or less the temperature swings will be so bad that the oceans will boil away and life will be unsustainable on Earth.
I’m so Texan I could tell he was at a Bucee’s just from that clip
@@docpossum2460 If he was headed into Houston, then it must be Katy.
Hell yeah b u c e s
Lmao yeah the south knows a bucees when we see one 😂
Yeah that one was in katy
Me a Floridian what you guys are doing across the gulf
The rocket equation -- it's a beautiful thing
Can't we just sacrifice some Kerbals and wing it?
I may or may not have introduced Don to KSP while we were shooting
It's Okay To Be Smart I hope he loves it if he does play it or watch it
Kerbin is 0.1 the size and about 0.01 the mass of Earth. So much easier for them to wing it for exactly the reasons talked about in the video ;)
Of course, Realism Overhaul exists... The real hard mode for KSP
@@travcollier true, but fuel capacity and/or energy efficiency was greatly nerfed to compensate for it
@@travcollier to escape key in you need ~3k m/s Δv ,for earth ~11k m/s Δv .
You heard it here first, folks. The 1% depends entirely on the work of the 99% to get anywhere.
we've been knew
It is the way
And what gets all the credit? The 1%. Those bastards.
The Bernie-Rocket would be a flat barge.
Powered by gerbil cages.
@@dahawk8574 Yeah, he only started the current progressive movement. The one that's now the narrative in Washington. He's such a reject, stuck in the past.
7:11 I guess you must have never played Minecraft the limit is 256 blocks up.
what noobs amirite ? 🙄😂
That’s byte limit that’s why
"I was told there would be no math." -me entering Psychology
Meth*
"Going to Mars is really hard"
Dr Zubrin: *Doubts*
Now that we've overheated the Earth, let's get started on Lunar warming
Good luck with that :-D
Actually, if you could create an atmosphere on the moon and heat it, it would go a long way to make it inhabitable :-)
For this you just need more gravity and a magnetic field. Simple really.
"If the only tool you have is a hammer every problem starts to look like a nail."
With you, it's Global Warming. That's your hammer.
Someones says, "Lovely soup but a bit hot."
You say, "Just imagine how hot it's going to be with global warming."
You must be a very boring person to live with.
I'm guessing you're thinking, "But just imagine how boring I'd be when Global Warming starts."
@@MrStringybark Actually, I don't give a damn about global warming, since I build amateur solid-fuel rockets and I ride 2-stroke motorcycles.
I was just making a joke, Karen
@@SirRandom First of all. Have you heard of Poe's Law?
Some smart people are known to use aLtErNaTiNg CaPs
to show sarcasm or satire. Don't worry none, we all realise it's new to you but you'll pick it up after a while.
BTW. It's soooo cute you learnt a new word today, Ka-ren.
" I was street racing back when ships still ran on moon water "
That guy be like,
***moves his head closer and closer while explaining***
I like that strategy!
9:00 "frozen H2O" it's just ice man
dang i’m here early,
i’m here for the moon nation, where do i sign up
Sign right here next to Satan's signature please
Why are you asking me?
Yeah, why are you asking us?
I have always read how the moon has an abundance of He-3. And yet nobody uses them
@@echoscience3922 yeah. Because we're not up there. Hard to use something we can't access
I love how you make it so simple for us to understand the video
The Rocket Equation "it's a beautiful thing"
If every video of yours had a correlated Brilliant lesson, I'd be very motivated to complete those math and science lessons.
I grew up in Huntsville Alabama, so I’ve kind of always had an idea just how massive the Saturn V rocket is. You can see it from halfway across town, and if you actually go to the space and rocket center, it’s unbelievably huge
10:50 my OCD is going crazy!
Same. But I pretend that's the way it is suppose to go. That makes it easier. 😂
I wonder when they might realize. Why research artificial gravity. When you can build a space ship around the moon. When earth is did and done for. Raid all the resources of the earth to build a death star.
Great series of videos, thanks for these. One point in this one at about 6.5 minutes, the statement "if earth was 10 - 15% bigger, we would not be able to get off. More correctly, the statement should be "if the mass of earth..." For example, if the diameter of earth was larger, but the mass stayed the same, it would be easier to launch a rocket.
amen someone noticed this also, when I was watching and it got to this part I started frowning in disbelief.
Wow! That clears up a lot of the confusion as to why returning to the Moon is so important for advancing space exploration! Thank you.
I wonder what the next decade holds for us in terms of space exploration and discoveries. The concept of putting rockets on the moon is interesting no doubt.
glad to see you like to remain educated
Damn thanks for teaching me something new and interesting
I'm so glad you posted again! i have literally binge watched every episode.
SAYKM?
It’s been a few years since I’ve seen a vid from this channel but I’m glad to see it’s still doing really well
Elon musk: does something cool with spacex
Everyone: Look what we did and what _we_ did and are going to do!
8:10 I absolutely agree. I don't think humans would have ever made the push into space without a moon to sustain our curiosity or to have an achievable goal.
I like it, u had authentic astronaut in your content
That's the best simplification of the rocket equation for beginners I've ever seen! 👍
There was an old story about what ppl needed to discover America.. forgot its origin, but something like this:
You need a carriage and 2 horses. Those horses need lots of food so you would need another carriage and 4 more horses, those 4 more horses need food too so....
Then they got to the beach and realized what they need is a boat..
10:51 My internal perfectionist was crying at this moment
Wonderful explanations and demonstrations. One of the better descriptions of the rocket equation. Also great imagery of the size of the payload vs the size of the total rocket.
They way this man talks is as if he is creating whole rockets in his head between words. Complete thought between words, it's incredible.
He must get interrupted a lot.
Let's put rockets and *permanent bases*
Permanent bases (industrial-scale spacecraft manufacturing and/or industrial-scale rocket propellant synthesis) are a requirement for the Moon to save us any energy and/or time at all. If we don't have these things, then going there is a detour, not a shortcut. It would take more energy than going straight to a target from Earth since all of it still has to be lifted into orbit from Earth anyway. And establishing an industrial base like that is multiple decades out. So at the very least on the timeline this video has been disappointingly misleading.
why?
When you have played KSP, you will eventually learn all of this and more WITHOUT any equations ... ✌
I don't know why NASA uses only two boosters they just have to add more smh
How many kerbals were lost during trails?
@@MPostma72 none, we just revert to space centre when they blow up!
Perfectly awesome LEGO background!
Wow, such a fascinating video, and you simplified it so well.
how long would take for humans to destroy the moon by taking resources from it?
well it's gonna look the same anyway
Yes let’s make the moon a gas station.
My personal favorite part of this video is the fully-assembled Voltron in the background!!
This is one of my favorite videos on CZcams!
Species after us: Humans went extinct because they had a space program.
lol
My fingers are rockets
Wow! I loved your video, you explained everything so I could understand. Thank you
This is awesome! Thank you, Joe!
were could we go to refuel
him: the moon
me:minimus
KSP!
“We’ve gotten pretty good at the aviation industry”
Boeing 737:
Statistically we are very good
11:42 "Making CZcams videos is not rocket science.
Rocket science is rocket science."
Joe, 2019 (It's Okay To be Smart)
I see you using the tip of your LEGO Saturn V as a rocket model. You can't put anything past me!
Ah, the rocket equation. That explains why its so hard to get my big m'ass out of my easy chair.
My husband gave me the same Lego Saturn V for christmas! So cool to build
That fuel visualization is pretty awesome, thanks for that.
HAPPY NEW YEAR!!!
I was told there was no math.
Reallty can be often disapointing
I suspect 99% of the audience didn’t get the Chevy Chase reference.
That is one of the best gravity well representation we've seen, seriously =D
Greatly explained!
I learned absolutely nothing new watching this but still got excited for the future. Here's hoping that people won't ruin it for themselves.
Doesn't the moon have Helium-3 on it, too?
It does, but we can't do fusion yet, so it's pointless
@@YounesLayachi well if we can do fusion in the future then going to the moon now would be pretty useful to prepare Helium-3 mining
*Why We Should Put Rockets on the Moon:*
1. So there would be someone left Outer Space in case the Earth turns into Dr. Stone
Kars turned into Dr Stone when he entered the vacuum of space ;)
Lol
I'm 10 billion percent certain that all astronauts should be gorgeous celebrities so that all girls in 3700 years look like Kohaku
rocket science - awesome video. thank you
great episode, much props
I just have one problem with the idea of using ice from the moon.
What if we run out of ice on the polar caps?
If you Google "How much water is on the moon" you will find an article from airspacemag dot com that estimates between 100 million and a billion metric tons _at each pole._ Should be enough to reach Mars or the Asteroid belt, which all also have plenty of water in them.
@@mcarp555 it is still an estimate, not unfounded but still an estimate
@@kausardatta6821 even if it was 1% of that estimate (1million metric tons) and it takes about 1000tons to refuel a space shuttle that would be enough to fuel 1000 shuttles which is probably enough to get to mars and we know that mars has around 562 trillion tons of water which would be hard to run out of
3:15 he's pretending to fill up an Audi e-Tron
sorry it's a hybrid my bad ignore me
I noticed lol
Gorrium it’s an a3 Etron which is a hybrid
So he even cut the hole in the rear fender, so he could stick the nozzle in? Weird! He’s really committed to the bit huh?
@@thelobster9417 thank you for bringing this to my attention, my bad I didn't see the A3 or an obvious exhaust pipe
No I won’t ignore you…
You admitted you were wrong and apologised for it, that’s something more people need to do.
Joe totally has a crush on Don Pettit. He's always laughing and giggling whe he talks to him. Cute.
Wait wait wait! Everything is Physics!!!!!!!!!!!!!!!!!!!!!!!!
Also, I love how we explain gravity with gravity.
"I love talking to Don because of how his brain works"
Does that mean you love talking to me, because my brain works normally
kinda
Well... yes, and no. I´m all for building stuff on the moon and expand into space. But. At the same time, I´m not blind enough to ignore all that stuff is _a lot_ of launches and years away. Like, you would have to build the equivalent of a small city on the moon before seeing any amount of lunar-produced propellant, and any return on investment is even farther away.
In fact, I´m pretty sure that by the time we do that, the problem of cheaply putting payloads on LEO and staging from there will be mostly solved, 85% fuel on our rockets or not. And as a wise man once said, orbit is halfway to anywhere. In fact, any rockets going to the moon are already 90% of the way to anywhere already.
Well that's all well and good for the one rocket. The idea is that we build more rockets once we're there. Why would we just give up on the moon and build our 10% efficient rockets down here when we could have our 70% efficient rockets up there?
@@The_Jovian Well, the usual argument is that if you want to do X in space, you could spend your budget on building moon infrastructure, then do X cheaply. Or, you could have X done instead, expensively, but for less total money, and sooner. I think the first thing is to define X, anyhow, because right now everybody has a different idea of what X should be.
In any case, all humans leaving Earth will have to, you know, leave Earth. So we won´t get rid of the need to launch stuff to LEO. So why don´t we just focus our efforts on doing _that_ sustainably (AKA, fully reusable rockets). Then we can build the infrastructure elsewhere to go further, only cheaply. After all, fuel is a tiny, _tiny_ fraction of a rocket´s cost.
Amazing video. Really epic and easy to understand!
You convinced me with the cool rocks 👍
Carl Sagan.
With a lightsaber.
Riding a velociraptor.
Ugh finally I am not commenting on a 3 year old video:D
Damn that gravity well visualisation was simple yet totally understandable
6:34 I like how you guys just casually bring up probably one of the most significant solutions to the Fermi Paradox that I have never heard anywhere else.
"Super Earths" are considered to be far more hospitable to life because more gravity equals a denser atmosphere that can shield from solar radiation and cosmic debris. They also constitute a large fraction of the potentially habitable exoplanets we find. Therefore they're more likely candidates for life.
And yet, with their larger gravity well, any civilization would have to lean more heavily on nuclear propulsion to launch even satellites with potentially disastrous consequences - from nuclear proliferation to accidental rocket detonations scattering fissile material. That's even if nuclear propulsion is enough to overcome the gravity of a planet 1.5-2x the size of Earth. They would also likely never be able to construct a space elevator given that it's barely possible under Earth's relatively smaller gravitational pull.
Calling e "just a mathematical constant" is honestly so insulting.
As a physicist, I was flinching, too.
@@franzusgutlus54 Indeed.
Idk, I think we should put moons on rockets
This should have so much more views
Somebody has to make and engagement ring with moon dust in it so someone can say, “I’ll love you to the moon and back” 🧡
Wait, so this means that we wouldn't be able to land on a super earth like the ones we've found so far and come back. Doesn't sound like a very good idea unless we find a way to beat the rocket equation itself.
Space elevator, space hook, space catapult
@@The_Jovian Great, let's just take everything we need to make those in the rocket with us then. Lmao
Plenty of cheese for the astronauts
Happy new yr Joe
5:58 Over on the right, SpaceX be like "final illustration, to follow"
It is not the the rocket equation, it is the Tsiolkovsky equation you noughty russophobes!
Hahahahahah jokes on you because space is a ploy by the *GOVERNMENT* to make us obey
Says the guy perpetuating literal _nonsense_ backed up by nothing but emotion and set against *physical proof* of said trips to space.
Instead, he thinks there is a *WORLDWIDE* conspiracy between *THOUSANDS* even *MILLIONS* of scientists and politicians which is run *PERFECTLY* by our most efficient and least leaky of all organizations, the *GOVERNMENT*
You can't make this kind of stupid up. He has to be a real person. Lmfao.
Darth Obscurity ermmmmm joke.................
@@georgepatrick4339 Yeah, hilarious joke, not like anyone is going to read it and think they have support, right?
You should look up Poe's law before you ever post stuff like this ever again without being more obvious or adding a /funny /s or something.
@@georgepatrick4339 I would be more then willing to bet the 4 people who liked your post thought you were serious.
Darth Obscurity fair enough I suppose feeding people’s stupidity
Thanks! This video is great.
Great editing on this vid.