A Simple Level.

So if there is no direction in space then here's a simple way to prove it, the next time they go to space, if that's really even possible, take a carpenters level up there with them and when they go on a space walk they could take the level out with them and document what the bubble does, on film of course. With no gravity present it shouldn't react the same way it would normally, actually it shouldn't react at all, and they couldn't fake this in a pool.

if there is no direction in space

Sorry, I'm new here, but who has claimed there is "no direction in space?"

I asked the question in another post that what keeps the Earth from falling through space and someone replied that there is no up or down in space so where would it fall to.

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there?

Technically there is no such thing as zero-g.  I am not sure how the term zero-g originated, but it is describing things appearing to float in orbit.

What is happening when something is orbiting is it is falling.  Just falling fast enough and high enough above the Earth to continue falling.

When something passes the highest part of its orbit it begins to speed up.  It continues to do so until it reaches the low point.  Once it reaches the low point it begins to slow down as it travels back to the high point.

Imagine throwing a ball on Earth.  When you throw it it immediately begins to slow down and continues to do so until it reaches the high point.  Once it passes that point it begins to speed up as it heads towards the ground.

The more force I use the higher the ball will go.  Use enough force to get it high enough and traveling at or more than 7.8km/s it will continue to fall pass the Earth. Throw it with enough force that the ball reaches around 11 km/s it will escape the Earth's gravity and begin orbiting the Sun.

By escape Earth's gravity I mean it get's far enough away that the Earth's gravity will have less influence compared to the Sun's.  Earth's gravity will still have an influence along with the rest of the planets in our system.

As for your question about the level. yes it would behave differently since it is in free fall.  The bubble would be influenced more by the forces on it from being handled by the astronaut than anything else.

There are some problems with the experiment regarding the air bubble expanding and evaporation of the water, but we can just consider it a thought experiment and not consider the factors that would cause those issues.

There is already plenty of evidence of 0g in space.
For example, this video here:


If this can be faked, then so can any experiment involving a spirit level.

It will still react to various things, like people pushing it.

Gravity is still present, there just isn't a normal force like from standing on something.

Earth is constantly "falling" through space, towards the sun. This results in us orbitting the sun due to our sideways motion.
The same applies to the moon orbitting Earth, and the ISS (and the water on it) orbitting Earth.

Gravity (alone) isn't what causes spirit levels to form the bubble or water to form a level.
It is caused by a solid object pressing against the water, and then the air pressing against the water and the water pressing back.

In orbit (not just in space), these normal forces dont exist as the water and air and everything else is falling together.

This also happens in free fall (note: need to overcome wind resistance if you are in free fall in Earth's atmosphere).

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

Who says there's no gravity in space? There's plenty of gravity in space.

Astronauts, the ISS and satellites in general are 'weightless' because they are free-falling, that is they are yielding to gravity completely. An object only has weight when it resists gravity, not when it yields to it.

I asked the question in another post...

Could you maybe quote this post?

Technically there is no such thing as zero-g.  I am not sure how the term zero-g originated, but it is describing things appearing to float in orbit.

It's called microgravity.

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon?

There is gravity.  The moon is in orbit.

It holds the moon in place but astronauts just float around up there?

They are also in orbit.

I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc.

The object that is orbiting the larger object is falling toward that larger object.  It has enough lateral velocity though that it continuously misses.

So which one is it? Is there gravity in space or isn't there?

There is gravity.

Or are astronauts just immune to gravity in space?

No.

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

Quote from: Overworld on December 23, 2016, 11:11:39 PM

if there is no direction in space

Sorry, I'm new here, but who has claimed there is "no direction in space?"

                                                                                                                                                                                                                                                                                                                                   "There is no "up" in space. Earth has nowhere to fall to." this comment was made by "RocksEverywhere" on my post "I thought perpetual motion didn't exist"         

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

If you could go out into space, far away from earth, which direction would be up?

Quote from: Definitely Not Official on December 24, 2016, 01:37:55 AM

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

the gravitational attraction of the ISS to the astronauts is very small compared to the force they could push themselves away with.  Gravity does not behave differently.

If you could go out into space, far away from earth, which direction would be up?

                                                                                                                                                            Well apparently there IS gravity in space so you could take a level with you, but then again from what I've heard so far gravity doesn't seem to behave in any kind of predictable manner so just take a wild guess. I mean according to the inverse square law the Earths gravity increases in strength the further out it goes but they don't mention if that is a constant or if it ever decreases, not to mention the sun's gravity which is holding all the planets in it's orbit, so apparently space is awash in gravity but it seems very selective in nature, it just holds everything perfectly in place except for astronauts on space walks, they have to be tethered. And why do meteors hit the Earth? Wouldn't Earth's gravity grab a hold of them and hold them in orbit? If it's because they have their own propulsion then what is propelling them? It's been said elsewhere in this forum that it's because there is no gravity in space so there is nothing to slow them, or anything else, down from their Big Bang inertia but we've just established that space is awash in gravity so...And apparently we are constantly falling toward the sun which means there is an up and down in space but nevertheless wherever you are on the "globe" everything is upright. And a if we are falling toward the sun eventually we have to slingshot around it, and again gravity seems to display selective, intelligent properties, instead of slinging us out into space it adjusts and holds us perfectly in place etc. etc.

Quote from: Overworld on December 24, 2016, 04:04:31 PM

Quote from: Definitely Not Official on December 24, 2016, 01:37:55 AM

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

the gravitational attraction of the ISS to the astronauts is very small compared to the force they could push themselves away with.  Gravity does not behave differently.

                                                                                                                                                          Okay, what about Earth's gravitation? If it's holding the ISS in place why does it not hold the astronauts in place? And why would they push away? And if they did shouldn't the gravity pull them back to it? So it's strong enough to hold a massive structure in place but not an astronaut? And how does gravity decide exactly where to hold the ISS, the moon or satellites? Gravity seems to behave like an intelligent tractor beam.

Quote from: frenat on December 24, 2016, 04:39:24 PM

Quote from: Overworld on December 24, 2016, 04:04:31 PM

Quote from: Definitely Not Official on December 24, 2016, 01:37:55 AM

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

the gravitational attraction of the ISS to the astronauts is very small compared to the force they could push themselves away with.  Gravity does not behave differently.

                                                                                                                                                          Okay, what about Earth's gravitation? If it's holding the ISS in place why does it not hold the astronauts in place? And why would they push away? And if they did shouldn't the gravity pull them back to it? So it's strong enough to hold a massive structure in place but not an astronaut? And how does gravity decide exactly where to hold the ISS, the moon or satellites? Gravity seems to behave like an intelligent tractor beam.

they are still orbiting the Earth.  If they pushed away from the ISS, the gravitational attraction of the ISS to the astronauts is not great.  They would then have a slightly different orbit around the Earth.
There is no "deciding" where to hold the ISS, moon, or satellites.  Orbits are determined by the mass of the object being orbited and the speed of the orbiting object.  More speed gives you a bigger orbit.  Less speed a smaller orbit.

I mean according to the inverse square law the Earths gravity increases in strength the further out it goes

Actually the opposite is true. Earth's gravity becomes exponentially LESS strong the further away you travel.

Do you know how an inverse square works?

And how does gravity decide exactly where to hold the ISS, the moon or satellites? Gravity seems to behave like an intelligent tractor beam.

Gravitation does not decide anything it is not "intelligent".

An astronaut in space has the combined gravitational fields of all objects acting together,

The moon is about 384,000 km away from the astronaut and the centre of the earth about (radius of earth + 400 km), so the moon's effect is very small.
The ISS has a mass of about 400,000 kg and the earth has a mass of almost 6 × 10²⁴ kg.

The huge mass of the earth wins out (about 133 kg force)  by a huge margin over the ISS (about 4 mg force) and the moon (about 0.5 g force) - If my calculations are correct.

If ISS and astronaut are in a stable orbit around the earth gravitation provides the centripetal acceleration needed to keep them there.

Quote from: Logick on December 23, 2016, 11:14:04 PM

Quote from: Overworld on December 23, 2016, 11:11:39 PM

if there is no direction in space

Sorry, I'm new here, but who has claimed there is "no direction in space?"

                                                                                                                                                                                                                                                                                                                                   "There is no "up" in space. Earth has nowhere to fall to." this comment was made by "RocksEverywhere" on my post "I thought perpetual motion didn't exist"       

Note for those watching, this is the comment in question:

Quote from: Overworld on November 28, 2016, 11:28:50 PM

But weight is a force and the Earth is very heavy.

There is no "up" in space. Earth has nowhere to fall to.

The issue is that "up" in space is ambiguous.
I think what he meant was that there is no universal "up" direction where everything should be falling "down".
But yes, he was technically wrong.

Also, in that thread other people, including myself, answered you.
I pointed out 2 of your questions were related, effectively having the same answer.
That was your question about what is propelling Earth/keeping it in motion, and why Earth doesn't fall.

The answer was that Earth does "fall". That falling is what is propelling (and steering) Earth, keeping it in motion and keeping it orbiting the sun.
As it falls it also moves sideways. And as it moves sideways, the direction of "down" will change as well, as it will point to the barycenter of the Earth-Sun system (approximately).

                                                                                                                               Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

The gravitational attraction of the ISS is pretty much nothing.
Gravity is fairly predictable with a possible exception of very large distances (galactic scales).
The force due to gravity is given by the formula:
F=GMm/r^2, which G is a constant 6.67E-11 N m^2/kg^2=m^3/ s^2 kg, M is the mass of one object, m is the mass of the other object and r is the distance between them.
The acceleration due to gravity for the object with mass m is GM/r^2.

For someone just outside the ISS:
Earth has a mass of 5.97E+24 kg. The distance to the centre of Earth is roughly 6800 km (6400 km radius, 400 km orbital height) or 6 800 000 m (6.8E+6 m).
This means their acceleration due to Earth's gravity is 8.62 m/s^2. (On Earth, it is a lot higher).
For the ISS it is a lot less.
The ISS's mass is ~420 000 kg (4.2E+5 kg). So if you treat it as a point particle, with the astronaut 1m away from the centre (which would still be inside it), then the acceleration would be 2.8 E-5 m/s^2.

If you assume this magically stays constant (which it doesn't, it will drop as the astronaut drifts away), and an astronaut pushes themselves away at a staggering rate of 1 cm /s (which is VERY slow), then it would take them over 350 seconds just to stop, which is quite some time.
In those 350 seconds, the person would have moved an extra 178 cm, or 1.78 m. This will increase their distance from the centre to 2.78 m and thus their acceleration drops to 3.6E-6 m/s^2.

You can also calculate the escape velocity of an object. This is the velocity at which gravity (so ignoring with resistance) will slow the object down continually without stopping it. So it will lose speed as it goes away and the rate it will lose speed will also drop and it will forever be approaching a speed of 0, but never quite getting there. If you are below that velocity, then gravity alone is enough to stop you moving away from the object and bring you back to it. If you are above it, instead of approaching 0, you will approach some other speed with you continuing to move away from the object.
This is similar to the formula for acceleration, it is:
v=sqrt(2GM/r)

So for Earth (with an enlarged radius of 6400 km), the escape velocity is 11160.7 m/s or over 11 km/s. That is very fast. You would need some pretty decent rockets to achieve that.
For Earth, at ISS' orbit, it is lower, but not by much. It is still over 10.8 km/s.
For our hypothetical person location 1m away from the hypothetical point particle ISS, it is only ~0.0075 m/s or 7.5 mm/s.

What this means is that if an astronaut on the ISS, even in this best case hypothetical situation, manages to push themselves away at a speed of 7.5 mm/s, they will never be coming back unless they manage to intersect the orbit or are otherwise rescued.
That is why they are tethered.

Perhaps one thing to note is that the mass of an object (assuming the density stays the same) scales as r^3, which means the escape velocity scales as a function of sqrt(r^3/r), or r, and the acceleration will scale as a function of (r^3/r^2) or r. This means for something tiny like the ISS, it will have basically no gravity detectable by man. It is too small for us to feel it.
But for something massive like Earth, it will be very easy for us to notice it unless we are in free fall.

Well apparently there IS gravity in space so you could take a level with you, but then again from what I've heard so far gravity doesn't seem to behave in any kind of predictable manner so just take a wild guess.

No. It behaves in a predictable manner, it can just be difficult to understand if you don't spend time to think about it and take note of all factors.

I mean according to the inverse square law the Earths gravity increases in strength the further out it goes but they don't mention if that is a constant or if it ever decreases,

It decreases the further out you go. If you double your distance then the force/acceleration due to gravity will be 1/4 of what it was.

The only part we aren't very sure if it does act the same is on the galactic scale of tens of thousands of light years.

not to mention the sun's gravity which is holding all the planets in it's orbit, so apparently space is awash in gravity but it seems very selective in nature, it just holds everything perfectly in place except for astronauts on space walks, they have to be tethered.

No. Nothing is held perfectly in place. This is what allows us to launch rockets and satellites.

Gravity isn't some sentient force guiding planets along a path.
And sometimes people don't even understand the true path.
For example, many think Earth's path is an ellipse. It isn't. It has an ellipse as a base, but it has sinusoidal perturbations due to the moon (and to a lesser extent by other objects).

Objects like the ISS are in orbit around Earth. You can consider this as falling towards Earth, while also moving sideways.
When you are falling, if you throw something away, gravity doesn't magically bring it back to you. It just keeps on making you both fall.
The same applies with the astronauts and the ISS.
As they are falling, if the astronaut pushes the ISS away, they get separated, gravity wont magically bring them back together.

And why do meteors hit the Earth? Wouldn't Earth's gravity grab a hold of them and hold them in orbit?

No. It won't. Some meteors can be "put" in "orbits" (or exist in them) such as at L4 and L5. But there are infinite possible orbits that exist (especially if you include hyperbolic and parabolic ones). Everything near Earth, which is just being affected by gravity (so no standing on things or air resistance or rockets) is in an orbit. It is just lots of these orbits intersect with Earth, at which point other forces act to bring it out of orbit.

So when a meteor does come near Earth, it will typically enter an orbit. If it is travelling fast enough that will be a hyperbolic orbit, meaning it will just pass us and leave.
If it is slow enough, it will be an elliptical orbit, often getting far enough away to be pulled away by another massive object. But like I said, some times these orbits will intersect Earth resulting in them hitting us.

If it's because they have their own propulsion then what is propelling them?

Not quite. It is more we specifically put the ISS into a specific orbit and made its velocity match that required for that particular orbit. For any particular altitude, there is only 1 velocity for a circular orbit. Any slower, and it is in an elliptical orbit which reaches a lower point, potentially crashing into Earth (such as whenever you throw a ball, ignoring the wind or release something in a vacuum chamber). If it is faster, it could be an elliptical orbit or a parabolic or hyperbolic one (and this is assuming your velocity is perpendicular to "down")

And apparently we are constantly falling toward the sun which means there is an up and down in space but nevertheless wherever you are on the "globe" everything is upright. And a if we are falling toward the sun eventually we have to slingshot around it, and again gravity seems to display selective, intelligent properties, instead of slinging us out into space it adjusts and holds us perfectly in place etc. etc.

Again, up and down is relative. Relative to the solar system, the sun can be considered down.
Earth, and everything on it, is falling towards the sun, and it is falling at pretty much the same speed so we don't notice any difference in the acceleration of us and Earth.
We are also constantly moving sideways, so we are constantly "slingshotting" around it. It is like a ball on a string being spun around.


Relative to Earth, the centre of Earth is down. This is because Earth's gravity is pulling us down. For the ISS, its mass is too low to have any significant gravity to pull the astronauts to it.

There is nothing selective or intelligent about it.

Okay, what about Earth's gravitation? If it's holding the ISS in place why does it not hold the astronauts in place? And why would they push away? And if they did shouldn't the gravity pull them back to it? So it's strong enough to hold a massive structure in place but not an astronaut? And how does gravity decide exactly where to hold the ISS, the moon or satellites? Gravity seems to behave like an intelligent tractor beam.

It isn't holding it in place.
It is causing it to continually alter course resulting in it orbiting Earth rather than flying off into space.
There isn't a magic path it tries to keep the ISS on.

Again, it is just like falling. If you push an object away while falling, it moves away. You both falling doesn't magically bring you together.

Due to the astronauts velocity, it will be "held" in orbit as well. But there is no intelligence making the orbits (other than man setting them up). So they won't be brought back together, they will have their own orbits.

It is just like a path of a falling object, actions that object does will affect the path it takes, gravity doesn't decide, it just results in an acceleration/force based upon a simple formula (which can get quite complex when you consider all bodies).

The same applies to other satellites including the moon (a natural satellite).

If you could go out into space, far away from earth, which direction would be up?

The opposite direction to down.

Quote from: Definitely Not Official on December 24, 2016, 01:37:55 AM

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

Why would gravity hold them to the ISS? I don't understand what you mean...

Quote from: frenat on December 24, 2016, 04:39:24 PM

Quote from: Overworld on December 24, 2016, 04:04:31 PM

Quote from: Definitely Not Official on December 24, 2016, 01:37:55 AM

Quote from: Overworld on December 23, 2016, 11:26:02 PM

Which brings up a new question, if there is no gravity in space then how is the Earth's gravity holding the moon? It holds the moon in place but astronauts just float around up there? I hear that there is no gravity in space but then I hear that the Earth's gravity holds the moon, satellites, the ISS etc. in place, and the sun holds all the planets in orbit etc. etc. So which one is it? Is there gravity in space or isn't there? Or are astronauts just immune to gravity in space?

There is gravity in space. The reason things float inside say the ISS is that the ISS is orbiting the earth, and thus is in a constant state of free fall. Essentially the ISS is constantly falling. Everything inside it is falling at the same rate, so there is no relative acceleration, and the impression that there is no gravity is given.

                                                                                                                                                          Okay then what about when they are on space walks, they have to be tethered or they will just float out into space? Wouldn't the gravity hold them to the ISS? So gravity behaves differently in space? It seems gravity behaves like a selective tractor beam.

the gravitational attraction of the ISS to the astronauts is very small compared to the force they could push themselves away with.  Gravity does not behave differently.

                                                                                                                                                          Okay, what about Earth's gravitation? If it's holding the ISS in place why does it not hold the astronauts in place? And why would they push away? And if they did shouldn't the gravity pull them back to it? So it's strong enough to hold a massive structure in place but not an astronaut? And how does gravity decide exactly where to hold the ISS, the moon or satellites? Gravity seems to behave like an intelligent tractor beam.

Gravity doesn't hold things together, it pulls them. The ISS isn't held together, it's just in orbit. It's similar to how athletes in hammer throw essentially pull the hammer towards them, and the result is the hammer moving in circles around them. Objects orbiting the earth are basically in a state of constant free fall, as I have already told you. How does that correspond to gravity holding astronauts together?

So if there is no direction in space then here's a simple way to prove it, the next time they go to space, if that's really even possible, take a carpenters level up there with them and when they go on a space walk they could take the level out with them and document what the bubble does, on film of course. With no gravity present it shouldn't react the same way it would normally, actually it shouldn't react at all, and they couldn't fake this in a pool.

they would put up a nice CGI and nobody would care anyway

Quote from: Space Cowgirl on December 24, 2016, 04:04:56 PM

If you could go out into space, far away from earth, which direction would be up?

The opposite direction to down.

And what way would be down?

they would put up a nice CGI and nobody would care anyway

And that's the other issue.
People like you don't care about the truth. You just want to be right.
Any evidence provided that goes against your view, you will just dismiss.

People like you don't care about the truth. You just want to be right.
Any evidence provided that goes against your view, you will just dismiss.

So, you wonder into a forum called The FLAT EARTH SOCIETY, of your own volition, and set forth to conquer that with which you disagree. Furthermore you expect FES to roll over and worship your ideas and opinions above their own.

People like you don't care about the truth.

People like you - I feel sorry for.

Quote from: JackBlack on December 25, 2016, 12:05:27 PM

People like you don't care about the truth. You just want to be right.
Any evidence provided that goes against your view, you will just dismiss.

So, you wonder into a forum called The FLAT EARTH SOCIETY, of your own volition, and set forth to conquer that with which you disagree. Furthermore you expect FES to roll over and worship your ideas and opinions above their own.

Quote from: JackBlack on December 25, 2016, 12:05:27 PM

People like you don't care about the truth.

People like you - I feel sorry for.

No. I don't expect them to roll over and worship me or my opinions. I don't even expect them to give a damn about facts and evidence that is presented.

Some people may not be completely indoctrinated into the flat Earth cult. It is these people I am here for. To point out all the bullshit "supporting" a flat Earth so they dont' get indoctrinated.
All it takes for bullshit to triumph is for smart, rational people to say nothing.

I don't really care if pathetic people feel sorry for me. They have no reason to.

Some people may not be completely indoctrinated into the flat Earth cult. It is these people I am here for. To point out all the bullshit "supporting" a flat Earth so they dont' get indoctrinated.

So, you view yourself as the Savior?