Why do astronauts on board ISS float around

Incorrect.

You just copy-pasted nonsense.

Try again, Buffalo Bill.

Explain this:



Look a bit closer, eh?

We know we can't explain it to you because your too stupid, but to those who aren't, here is the answer.

Once the rocket is in a circular orbit of the earth, it burns prograde to make it's orbit path elliptical and intersect with the moons orbit, when the rocket gets near the moon it is captured by the moons gravity, the rocket then burns retrograde so that is slows down so it goes into a circular orbit of the moon.

Does a prograde burn not make a circular orbit more elliptical.

Definitions
Prograde-the direction the rocket is currently moving
Retrograde-the opposite direction to prograde.
Burns (direction)- fires the engine to accelerate (direction)

Those are my own words.

An admin needs to ban you.

For being a self-confessed sock-puppet & sending me abusive PMs.

Now; explain what this represents IN YOUR OWN WORDS:

Quote from: Empirical on January 09, 2016, 11:17:09 AM

We know we can't explain it to you because your too stupid, but to those who aren't, here is the answer.

Once the rocket is in a circular orbit of the earth, it burns prograde to make it's orbit path elliptical and intersect with the moons orbit, when the rocket gets near the moon it is captured by the moons gravity, the rocket then burns retrograde so that is slows down so it goes into a circular orbit of the moon.

Does a prograde burn not make a circular orbit more elliptical.

Definitions
Prograde-the direction the rocket is currently moving
Retrograde-the opposite direction to prograde.
Burns (direction)- fires the engine to accelerate (direction)

Those are my own words.

Why hasn't he been banned?

He's a troll.

Why hasn't he been banned?

It's quite amusing to imagine him shouting into the void.

I have a question that I don't know the answer to. Maybe one of you space cowboys can answer it for me. NASA say,"Once in Earth orbit, the last stage of the Saturn rocket fires, boosting the Apollo spacecraft and its three-man crew into its flight trajectory to the moon." Okay they fire the last stage of a big rocket to put them into flight trajectory to the moon. My question is, how come when they leave the moon's orbit they don't need to fire a big rocket to put them into flight trajectory to the earth.

NASA says,"Upon return to Earth, the command and service modules separate, leaving the command module to plunge into the Earth's atmosphere at a velocity of 25,000 mph." I've looked at the command and service module and I don't see anything that looks like the last stage of a Saturn rocket.

Wouldn't they need the same power to get to earth as it does to get to the moon?

Another thing, Look a the command module, how does that thing enter the earth's atmosphere perfectly with the shield pointing down and not tumbling every which way and not burning up?

Your just saying I'm wrong with no justification. I gave an answer.

Quote from: Yendor on January 09, 2016, 10:15:40 AM

I have a question that I don't know the answer to. Maybe one of you space cowboys can answer it for me. NASA say,"Once in Earth orbit, the last stage of the Saturn rocket fires, boosting the Apollo spacecraft and its three-man crew into its flight trajectory to the moon." Okay they fire the last stage of a big rocket to put them into flight trajectory to the moon. My question is, how come when they leave the moon's orbit they don't need to fire a big rocket to put them into flight trajectory to the earth.

They do need a big rocket, just not nearly as big as the one that got them there.

It doesn't have to be as big for two reasons:

1. It takes less thrust to accelerate a given mass away from the Moon than from the Earth because the Moon is much less massive.

2. The CSM's engine doesn't have to accelerate nearly as much mass as the S-IVB had to. At TLI, the S-IVB's J-2 engine had to lift the Command Module with three astronauts and provisions for more than a week, the fully-fueled Service Module, and the fully-fueled LM with its tools, fuel, and supplies and the S-IVB stage itself with a partial fuel load. When leaving lunar orbit, the Service Propulsion System (the CSM's AJ-10 engine) had to lift the Command Module with three astronauts and provisions for three days plus a few hundred pounds of samples, and the Service Module with its partially-depleted fuel supply (probably about half at the start of the insertion burn, but that's a guess). Everything else was left behind or consumed.

Quote

NASA says,"Upon return to Earth, the command and service modules separate, leaving the command module to plunge into the Earth's atmosphere at a velocity of 25,000 mph." I've looked at the command and service module and I don't see anything that looks like the last stage of a Saturn rocket.

It may be small compared to a J-2, but that's still a pretty honkin' big rocket compared to the size of the craft it's bolted to.

Quote

Wouldn't they need the same power to get to earth as it does to get to the moon?

Nope. See above.

According to Wikipedia, the SM's AJ10-137 engine has about 9% as much thrust as the S-IVB's J-2 engine (91 kN vs 1001 kN).

Quote

Another thing, Look a the command module, how does that thing enter the earth's atmosphere perfectly with the shield pointing down and not tumbling every which way and not burning up?

Careful design, planning, and execution. They had very good rocket scientists and aerospace engineers working on it, and a well-trained crew aboard.

[Edit] Oops.. forgot the S-IVB in the list of things the S-IVB had to move but the SPS didn't.

I can draw a picture that shows a car working by having a small person inside turning the wheels, that doesn't mean that's how cars work.

No scientists will say that rockets get to the moon by sling shot. Once the ship is in low earth orbit, it accelerates prograde, this changes the orbit path to an ellipse, which intersects with the orbit of the moon.

When did I call you names, your the one resorting to profanity.
In the picture that path isn't a straight line, its an elliptical curve.
Conics curves are circles, ellipses, parabolas and hyperbolas. The path of an orbit will always be one of these curves, with a focus if the curve being the position of the planet. The prove of this is to complex for me to put here, if you want to argue this point look up the maths behind it and try and find something wrong with it.
When the ship is going in a circle path, it accelerates in the direction it is going, this causes the orbit path to change from a circle to an ellipse, the ship has to accelerate at the right time and amount so that the ellipse orbit will go past the moon. When the ship gets to the moon, it slows down relative to the moon, so that it starts orbiting it.

The circle around the earth is a circular orbit, the path between the earth and moon is a section of an elliptical curve around the earth, untill near the moon, when the rocket changes it's trajectory to a elliptic orbit around the moon, which is then stabilized to a circular orbit around the moon.

The circle around the earth is a circular orbit, the path between the earth and moon is a section of an elliptical curve around the earth, untill near the moon, when the rocket changes it's trajectory to a elliptic orbit around the moon, which is then stabilized to a circular orbit around the moon.

Quote from: Empirical on January 09, 2016, 04:32:25 PM

The circle around the earth is a circular orbit, the path between the earth and moon is a section of an elliptical curve around the earth, untill near the moon, when the rocket changes it's trajectory to a elliptic orbit around the moon, which is then stabilized to a circular orbit around the moon.

You think you're 'explaining' things, but you're just stringing words together.

It's pretty sad.

You may as well say: 'Santa accelerates to every house in his Sleigh, stops via a retrograde reindeer-burn, climbs down the chimney, eats milk & cookies & leaves presents, depending on who's been Naughty or Nice, then re-climbs the chimney, accelerates his sleigh again via a booster reindeer burn, and repeats the process until all presents are delivered'.

Toodle-pip, Chris Cringle!

Im sorry but physics isn't simple, I know you want to be special and be the only person knowing real physics, so you create your made up simple physics. But thats no how the real world works. Again, I sorry.