There's two systems, which collectively fall under "RCS"

RCS stands for "Reaction Control System"

The two types of RCS control are directional thrusters and reaction wheels

Directional thrusters are the most commonly used.
Did you learn about vectors in math?

Knowing basic vector calculations helps to visualize this

Reaction wheels are used to spin the spacecraft along the longer axis, while RCS thrusters are used to translate and rotate the spacecraft along the other axes

Ok. I got what you’re saying. In order to propel a heavy space vehicle in a vacuum requires an incredible force...especially as there is nothing to push against. Agreed?

Not an incredible force, just a force in general

The "nothing to push against" doesn't matter here, as the rocket engine is a self contained system. The fuel being ejected out the back is why the rocket moves forwards.

How much fuel is needed to lift off from earth, carry that craft to the moon (bearing the weight of a Land Rover, btw), landing successfully, taking off again and coming back to earth?

It depends on the type of fuel used, and the engines used in each stage

For example, Ion engines use Xenon gas, while conventional rockets tend to use kerosene, or a mixture of liquid hydrogen and liquid oxygen.

Certain boosters also use solid fuel, but those are mainly for support

So how much fuel is needed?

In this instance

It depends on the kind of fuel. What mission do you want to analyze?

The engine efficiencies matter as well

First moon landing

There's a reason people say "this isn't rocket science"

It's complex stuff

And even the tiniest change can throw off everything. Case in point, the Challenger Shuttle disaster. The entire shuttle blew up because a singular rubber ring cracked, because it was slightly too cold that morning.

@Dusty Garlic Wtf?

My friend posted this I’m no longer friends with them

🤔

||*Riiiiiiiiiiight*||

Lol jk have a nice day

😂

Don’t worry about it, man, just try not to troll the mods.

K

@Dusty Garlic I have taken your image posting privileges away.

K

Lol

!mute @Dusty Garlic

Dusty Garlic#5920 (294743497028665346) is now muted for '**Unspecified.**', alright? <:THUMBSUP6:403560443345371137>

Shoot, what did he say, I didn’t get to see it?

He claimed to be s flat earther

Oh, that’s it? Eh

Then posts shit like that

He’s a troll

Oh, nvm, lol

In total, for the Saturn V rocket