Those were good games

Wtf are the watchdog games?

They're games related to the concept of surveillance/mass manipulation

Where a company called Blume developed a "CtOS", a program that handles city infrastructure and stuff

And crime prediction algorithms/profiling are a major part of the second game.

You mean video games?

Yeah

O

I should have made that clear 😂

Yes you should have 😡

Sorryyy

😁

Yeah, they're really fun though. The main characters are hackers fighting against the establishment. In the second one, anyways.

Gohan. Back to the moon landing. Please explain how astronauts are able to manoeuvre spacecraft in the vacuum of space.

Right

Newton's Third Law of motion

By ejecting fuel from the nozzles or rocket engines, the spacecraft moves in the opposite direction

It's a self-contained system

Of course. But how can they actually drive it...or steer it?

That's actually a really good question, that I happen to know the answer to

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.