Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands at ???


Is 9th point even to consider -- do we move because of Universe expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to picture...)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for opinion:
Because Universe is expanding faster than the speed of light the Universe
is 156 billion light-years wide even though it is 13.7 billions years old:
http://www.space.com/scienceastronom...ay_040524.html

"Boyan" wrote in message
...
Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands at
???

Your movement is a relative thing - specifically relative to a coordinate
system. So for the above to make sense you need to specify the coordinate
system you want to use. Expansion of space is a geometrical property rather
than something like your movement. It is like the galaxies as say points on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a higher
space for the balloon to be contained in - mathematically we can describe it
without such.



Is 9th point even to consider -- do we move because of Universe expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to picture..
..)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for opinion:
Because Universe is expanding faster than the speed of light the Universe
is 156 billion light-years wide even though it is 13.7 billions years old:
http://www.space.com/scienceastronom...ay_040524.html

Please understand what SR is saying - it does not say things can not appear
to happen faster than light. What is says is that you can not send
information faster than light. The fact that galaxies appear to be receding
faster than light can not be used to send information so is not in violation
of relativity.

Thanks
Bill

Boyan wrote:
|snip|
Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.
|snip]

Whenever life get you down, Mrs. Brown
And things seem hard or tough
And people are stupid, obnoxious or daft
And you feel that you've had quite enu-hu-hu-huuuuff

Just remember that you're standing on a planet that's evolving
And revolving at 900 miles an hour
That's orbiting at 19 miles a second, so it's reckoned
A sun that is the source of all our power
The sun and you and me, and all the stars that we can see
Are moving at a million miles a day
In an outer spiral arm, at 40,000 miles an hour
Of the galaxy we call the Milky Way

Our galaxy itself contains 100 billion stars
It's 100,000 light-years side-to-side
It bulges in the middle, 16,000 light-years thick
But out by us it's just 3000 light-years wide
We're 30,000 light-years from galactic central point
We go round every 200 million years
And our galaxy is only one of millions of billions
In this amazing and expanding universe

The universe itself keeps on expanding and expanding
In all of the directions it can whiz
As fast as it can go, at the speed of light you know
Twelve million miles a minute and that's the fastest speed there is
So remember, when you're feeling very small and insecure
How amazingly unlikely is your birth
And pray that there's intelligent life somewhere up in space
Because there's bugger all down here on Earth

Monty Python: The Galaxy Song

It's not unlike my saying I am related or part of the moving stream of all of my
ancestors and relatives into the present, but I think he is saying he is also a
physical part of all of these 'realities' he lists, but since time is a part of
his
scenario he is claiming a physical connection in the present to realities which
do not presently exist. This has a religious component ?
Leo



Bill Hobba wrote:

"Boyan" wrote in message
...
Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands at
???

Your movement is a relative thing - specifically relative to a coordinate
system. So for the above to make sense you need to specify the coordinate
system you want to use. Expansion of space is a geometrical property rather
than something like your movement. It is like the galaxies as say points on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a higher
space for the balloon to be contained in - mathematically we can describe it
without such.



Is 9th point even to consider -- do we move because of Universe expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to picture..
.)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for opinion:
Because Universe is expanding faster than the speed of light the Universe
is 156 billion light-years wide even though it is 13.7 billions years old:
http://www.space.com/scienceastronom...ay_040524.html

Please understand what SR is saying - it does not say things can not appear
to happen faster than light. What is says is that you can not send
information faster than light. The fact that galaxies appear to be receding
faster than light can not be used to send information so is not in violation
of relativity.

Thanks
Bill

"Leo Sorenson" wrote in message
...

First please do not top post.

It's not unlike my saying I am related or part of the moving stream of all
of my
ancestors and relatives into the present, but I think he is saying he is
also a
physical part of all of these 'realities' he lists, but since time is a
part of
his
scenario he is claiming a physical connection in the present to realities
which
do not presently exist.

I have no idea what you are trying to say.

This has a religious component ?

Not as far as I can see.

Thanks
Bill

Leo





Bill Hobba wrote:

"Boyan" wrote in message
...
Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited
imagination
and using Google.com I came up with this. Clarifying this is
appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands
at
???

Your movement is a relative thing - specifically relative to a
coordinate
system. So for the above to make sense you need to specify the
coordinate
system you want to use. Expansion of space is a geometrical property
rather
than something like your movement. It is like the galaxies as say
points on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a
higher
space for the balloon to be contained in - mathematically we can
describe it
without such.



Is 9th point even to consider -- do we move because of Universe
expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it,
right?
(Not that it is practical for our life, but it is interesting to
picture..
.)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for
opinion:
Because Universe is expanding faster than the speed of light the
Universe
is 156 billion light-years wide even though it is 13.7 billions years
old:
http://www.space.com/scienceastronom...ay_040524.html

Please understand what SR is saying - it does not say things can not
appear
to happen faster than light. What is says is that you can not send
information faster than light. The fact that galaxies appear to be
receding
faster than light can not be used to send information so is not in
violation
of relativity.

Thanks
Bill

"Boyan" wrote in message ...
Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands at ???


Is 9th point even to consider -- do we move because of Universe expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to picture...)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for opinion:
Because Universe is expanding faster than the speed of light the Universe
is 156 billion light-years wide even though it is 13.7 billions years old:
http://www.space.com/scienceastronom...ay_040524.html

Very interesting post. You give me a chance to talk about what I
denote by Hierarchical Inertial System (HIS). All movement is relative
to some inertial system, but all inertial systems are NOT equivalent,
they are in a hierarchical relationship. A HIS can be used only to
describe the movements of the bodies that belong to it, the ones that
participate in the fixing of the center of mass. You show an excellent
description of the hierarchy (well, taken out the rotational ones that
are not inertial). Earth (more exactly Earth-Moon), Solar System,
Galaxy, Local Group,…, you are rising here in the hierarchy, every
step in the up direction implies a better model to describe Nature.
The corresponding centers of mass represent relative rests, every one
"more rest" than the precedent.
N.Bohr used a HIS in his 1913 hydrogen atom model (not with that
denotation, of course). He started fixing the center of mass of the
proton-electron system, making abstraction of the rest of the
Universe. Inside a HIS every belonging body can has a velocity, its
own velocity (that we can consider absolute in the context of the
given HIS, or relative to the HIS if you want), not a relative one
referred to other body. Both, electron and proton, have velocities in
the Bohr's model, determining the computed kinetic energies.
My HIS model do not address the existence or not or a highest inertial
system at the top that includes all Universe, but it does not reject
it, simply leaves that problem open.
I do not know if I you consider my explanation valid for your $1 000
000!

RVHG

"Rafael Valls Hidalgo-Gato" wrote in message
om...
"Boyan" wrote in message
...
Picture me how I 'WALK' & I shall give you $1.000.000 :-)


OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is
appreciated.


Imagine this example:

1) I am walking through train carriages at 3 km/h.

2) I am traveling with train at speed of 100 km/h.

3) I am rotating, with train, around Earth at 1,670 km/h.

4) I am orbiting, with Earth, around Sun at 107,000 km/h.

5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.

6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.

7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.

8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.

9) I am moving, with everything, through space while Universe expands at
???


Is 9th point even to consider -- do we move because of Universe
expansion?
Are presented velocities correct? Are there other motions in space?


This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to
picture...)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?


While here I'd like to point you to this article and ask you for
opinion:
Because Universe is expanding faster than the speed of light the
Universe
is 156 billion light-years wide even though it is 13.7 billions years
old:
http://www.space.com/scienceastronom...ay_040524.html

Very interesting post. You give me a chance to talk about what I
denote by Hierarchical Inertial System (HIS). All movement is relative
to some inertial system, but all inertial systems are NOT equivalent,
they are in a hierarchical relationship.

A note to the original poster. This guy is speaking ****. The POR
guarantees the equivalence of all inertial systems.

Rest of rubbish mercifully snipped.

Thanks
Bill

"Bill Hobba" wrote in message
...

"Boyan" wrote in message
...

Picture me how I 'WALK' & I shall give you $1.000.000 :-)

OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.

Imagine this example:

1) I am walking through train carriages at 3 km/h.
2) I am traveling with train at speed of 100 km/h.
3) I am rotating, with train, around Earth at 1,670 km/h.
4) I am orbiting, with Earth, around Sun at 107,000 km/h.
5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.
6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.
7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.
8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.
9) I am moving, with everything, through space while Universe expands

Your movement is a relative thing - specifically relative to a coordinate
system. So for the above to make sense you need to specify the coordinate
system you want to use. Expansion of space is a geometrical property
rather
than something like your movement. It is like the galaxies as say points
on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a
higher
space for the balloon to be contained in - mathematically we can describe
it
without such.

First, thank you very much for your reply Bill! I can see you are
physicist by profession, can I ask a bit more about what you do?

I don't understand - of course the coordinate system I had in my mind is
the biggest coordinate system we have, thus Universe. How "I" (all of us)
move within this Universe? Can we imagine / picture this? Today I had
this idea, could we model all this in computer? (Well, approximately.)

I still would like to ask with what speed Universe is expanding?
And if that "motion" moves us in perspective of Universe?
If I imagine a point (Earth) on the inflating balloon (Universe)
then every point moves from each other at certain speed.
I've read (link below), that expansion of Universe accelerates.
So, if I tried to make a 3D computer animation, which speed
should I use for observable galaxies to move away from one another?

I found an interesting article talking about expansion and that galaxies
are moving away from our galaxy at speeds higher than light, and thus
in time we will cease to see those galaxies since expansion is so
fast that light from those galaxies will never reach us (true?):
http://curious.astro.cornell.edu/que...php?number=575

Please let me know if steps above are correct (hierarchy of motion),
so making 3D animation in computer would resemble "reality" well.
I'd make it so that at first camera shows whole observable Universe,
then it zooms in toward Earth in steps, passing to local supercluster,
then local group of galaxies, then Milky Way, Solar System etc.

(Anyone has an internet address with good collection of space photos?)


Is 9th point even to consider -- do we move because of Universe
expansion?
Are presented velocities correct? Are there other motions in space?

This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to
picture.)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?

While here I'd like to point you to this article and ask you for opinion:
Because Universe is expanding faster than the speed of light the Universe
is 156 billion light-years wide even though it is 13.7 billions years
old:
http://www.space.com/scienceastronom...ay_040524.html

Please understand what SR is saying - it does not say things can not
appear
to happen faster than light. What is says is that you can not send
information faster than light. The fact that galaxies appear to be
receding
faster than light can not be used to send information so is not in
violation
of relativity.

Thanks
Bill

Yes, I read that somewhere already, makes sense. Though since you
mentioned that let me ask you this: How does quantum computer work
then (will work)? If you entangle two atoms and then take them far
apart, when you change state of one atom the other atom changes
state instantly. How is that possible if information can not travel
faster than light? What makes the other atom change instantly?

Thanks for your efforts in advance!

Boyan

"Boyan" wrote in message
...
"Bill Hobba" wrote in message
...

"Boyan" wrote in message
...

Picture me how I 'WALK' & I shall give you $1.000.000 :-)

OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is
appreciated.

Imagine this example:

1) I am walking through train carriages at 3 km/h.
2) I am traveling with train at speed of 100 km/h.
3) I am rotating, with train, around Earth at 1,670 km/h.
4) I am orbiting, with Earth, around Sun at 107,000 km/h.
5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.
6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.
7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.
8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.
9) I am moving, with everything, through space while Universe expands

Your movement is a relative thing - specifically relative to a
coordinate
system. So for the above to make sense you need to specify the
coordinate
system you want to use. Expansion of space is a geometrical property
rather
than something like your movement. It is like the galaxies as say
points
on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a
higher
space for the balloon to be contained in - mathematically we can
describe
it
without such.

First, thank you very much for your reply Bill! I can see you are
physicist by profession, can I ask a bit more about what you do?

I am not a physicist - I am a programmer/analyst by profession. However I
did a double degree in applied math and computer science and started my
masters in math - did not finish - bit too much hard work. Physics is a
hobby of mine - but having the background in math allowed me to approach it
a bit differently. However some genuine physicists do post here - they are
the people who you should listen to, not me.


I don't understand - of course the coordinate system I had in my mind is
the biggest coordinate system we have, thus Universe. How "I" (all of us)
move within this Universe? Can we imagine / picture this? Today I had
this idea, could we model all this in computer? (Well, approximately.)

I do not see how we can have motion without a coordinate system - the
expansion of the universe is not really motion is the usual sense AFAICS -
it is like the measure of the change in radius of the expanding balloon.


I still would like to ask with what speed Universe is expanding?

And if that "motion" moves us in perspective of Universe?

I am not quite sure what you mean by this. I think of the expansion as like
the increase in the radius of an expanding balloon. Since we are part of
the balloon then I suppose in a sense we are part of that expansion - but I
am pretty sure such effects would be undetectable.

If I imagine a point (Earth) on the inflating balloon (Universe)
then every point moves from each other at certain speed.
I've read (link below), that expansion of Universe accelerates.
So, if I tried to make a 3D computer animation, which speed
should I use for observable galaxies to move away from one another?

I found an interesting article talking about expansion and that galaxies
are moving away from our galaxy at speeds higher than light, and thus
in time we will cease to see those galaxies since expansion is so
fast that light from those galaxies will never reach us (true?):
http://curious.astro.cornell.edu/que...php?number=575

The article looks good.


Please let me know if steps above are correct (hierarchy of motion),
so making 3D animation in computer would resemble "reality" well.
I'd make it so that at first camera shows whole observable Universe,
then it zooms in toward Earth in steps, passing to local supercluster,
then local group of galaxies, then Milky Way, Solar System etc.

(Anyone has an internet address with good collection of space photos?)


Is 9th point even to consider -- do we move because of Universe
expansion?
Are presented velocities correct? Are there other motions in space?

This is how we move through space and we don't even consider it, right?
(Not that it is practical for our life, but it is interesting to
picture.)

So, in more of "fun spirit" I'd ask this:
By above example (or something similar but "fixed") if you walk
for 10 meters, how many kilometers you travel in space-time?

While here I'd like to point you to this article and ask you for
opinion:
Because Universe is expanding faster than the speed of light the
Universe
is 156 billion light-years wide even though it is 13.7 billions years
old:
http://www.space.com/scienceastronom...ay_040524.html

Please understand what SR is saying - it does not say things can not
appear
to happen faster than light. What is says is that you can not send
information faster than light. The fact that galaxies appear to be
receding
faster than light can not be used to send information so is not in
violation
of relativity.

Thanks
Bill

Yes, I read that somewhere already, makes sense. Though since you
mentioned that let me ask you this: How does quantum computer work
then (will work)?

That is not really something I am up on. But please understand that is
would be built on the principles of QM which in no way violates relativity.
Thus is would not in be able to send information faster than light.

If you entangle two atoms and then take them far
apart, when you change state of one atom the other atom changes
state instantly.

Not quite. You see you are making an assumption that measurable properties
exist independent of our actually measuring them - such a view we might call
'naive reality'. Now QM casts doubt on this assumption (to understand this
a bit better you should have a look at the Kochen-Specker Theorem
http://plato.stanford.edu/entries/kochen-specker/ ). Now if nothing
actually exists unless we measure it then there is nothing to change
instantaneously when we measure an entangled state so there is no problem.
But even if there is (and we certainly have no evidence nature does not work
that way - with caveats as explained in the Kochen-Specker Theorem) the
effect can not be used to send information so it does not violate
relativity.

How is that possible if information can not travel
faster than light?

As explained above it can not be used to send information faster than light.

What makes the other atom change instantly?

Assuming you believe in naive reality the answer is nature is just like
that - simple as that.

Thanks
Bill


Thanks for your efforts in advance!

Boyan

"Boyan" wrote in message ...
"Bill Hobba" wrote in message
...

"Boyan" wrote in message
...

Picture me how I 'WALK' & I shall give you $1.000.000 :-)

OK, was kidding a bit. But I do wonder if someone here can portray me
a picture of how we move through space... By my own limited imagination
and using Google.com I came up with this. Clarifying this is appreciated.

Imagine this example:

1) I am walking through train carriages at 3 km/h.
2) I am traveling with train at speed of 100 km/h.
3) I am rotating, with train, around Earth at 1,670 km/h.
4) I am orbiting, with Earth, around Sun at 107,000 km/h.
5) I am moving, with Solar System, with respect to the
nearby stars at 72,000 km/h.
6) I am spinning, with Solar System, in spiral around
Milky Way centre at 828,000 km/h.
7) I am moving, with our Galaxy Milky Way, toward
the center of the Local Group at 144,000 km/h.
8) I am moving, with Local Group of galaxies (Local Supercluster),
at about 2,200,000 km/h relative to the universe as a whole.
9) I am moving, with everything, through space while Universe expands

And the fact that you aren't aware of 3-8 at all should tell you a lot
about inertial frames. The laws of physics don't care what inertial
frame you're in -- they aren't sensitive to absolute speed at all.


Your movement is a relative thing - specifically relative to a coordinate
system. So for the above to make sense you need to specify the coordinate
system you want to use. Expansion of space is a geometrical property
rather
than something like your movement. It is like the galaxies as say points
on
an expanding balloon - that such expansion occurs does not depend on a
coordinate system. But that is simply an analogy - we do not need a
higher
space for the balloon to be contained in - mathematically we can describe
it
without such.

First, thank you very much for your reply Bill! I can see you are
physicist by profession, can I ask a bit more about what you do?

I don't understand - of course the coordinate system I had in my mind is
the biggest coordinate system we have, thus Universe. How "I" (all of us)
move within this Universe? Can we imagine / picture this? Today I had
this idea, could we model all this in computer? (Well, approximately.)

The problem with the "rising raisin bread dough" model of the
expansion of the universe is that it conveys with it the notion of an
outer surface to the loaf, and hence by interpolation, the center of
the loaf. This is not a good model for our universe.

Let's take a finite universe, but in two dimensions: the surface of
the Earth. Here is a case where, supposing we are limited to traveling
(indeed existing) ONLY on the surface, we know that 1) the surface is
finite because if I keep going in a straight line in this universe,
veering neither left nor right, I end up back where I started; 2) the
universe is curved, because any two lines I set up as parallel end up
intersecting. Now, I'm going to ask two simple questions:
1. Where is the center of this 2-dimensional surface? Where ON THE
SURFACE can I point and say, this is the center of this surface?
2. If the surface was expanding (seen by the fact that the
Chicago-NewYork distance is increasing by 1 km every year and the
NewYork-Houston distance is increasing by 2 km every year) then what
is the speed of expansion of the surface?


I still would like to ask with what speed Universe is expanding?
And if that "motion" moves us in perspective of Universe?
If I imagine a point (Earth) on the inflating balloon (Universe)
then every point moves from each other at certain speed.
I've read (link below), that expansion of Universe accelerates.
So, if I tried to make a 3D computer animation, which speed
should I use for observable galaxies to move away from one another?

Note the above example. The speed with which two cities would separate
on an expanding earth would depend on the distance between them. There
is no constant number.

PD