How fast is the earth moving.

tkingdoll said:
"Due to rounding we are super-Einstein by one part in 186000 or so
- about 6 parts in a million 0.0006%. In any case special relativity does not apply to the stretching of the universe "
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Basically it means that the universe is expanding faster than the speed of light, in the sense that the radius of the visible universe is greater than c * age of universe. This poses no problems, because it is not a real 'speed' in the SR sense.
 
If I explain that, will you tell me how fast the earth is moving, relative to the constellation Hydra? :o
 
robinson said:
If I explain that, will you tell me how fast the earth is moving, relative to the constellation Hydra? :o
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The constellation of Hydra is not a single entity - it's just 'composed' of a number of stars which happen to lie in roughly the same direction. Some of those stars are moving towards us, some are getting further away; or conversely we are moving towards some of them and away from others.

So the answer is "It depends". :)

Your shot..
 
Gah!

Well, according to Kraan-Korteweg, Renée C. & Ofer Lahav. "Galaxies Behind The Milky Way." Scientific America. October 1998.

These measurements, confirmed by the Cosmic Background Explorer satellite in 1989 and 1990, suggest that our galaxy and its neighbors, the so-called Local Group, are moving at 600 kilometers per second (1.34 million miles per hour) in the direction of the constellation Hydra.
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Note they said, "in the direction of", neatly side stepping the issue of individual stars and stuff.

But this motion does no take into account the speed of the earth around the sun, around the galaxy, and the galaxy within the cluster, all of which make the actual motion of the earth quite complex.
 
heh

So that is your site? Cool. What is the measurement of the movement given by the calculator? I just see a number, no mps, mph, kph, just a number. And is it the motion relative to light expanding or what?

Have you ever viewed a three dimensional animation of the Earth moving through space time? Based on progressive viewpoints, expanding farther and farther out?
 
robinson said:
heh

So that is your site? Cool. What is the measurement of the movement given by the calculator? I just see a number, no mps, mph, kph, just a number. And is it the motion relative to light expanding or what?

Have you ever viewed a three dimensional animation of the Earth moving through space time? Based on progressive viewpoints, expanding farther and farther out?
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Not mine, it's a Quirkology site which is part of Richard Wiseman's stuff. The math was provided by John Brown.

My company designed and built it, what little of the site there is. And no less than FOUR other forum members contributed in one way or another :)

The calc says 'miles' next to it! What browser are you using?

No, I've never seen the animation you describe, but I would like to. Is there something like that online?
 
tkingdoll said:
The calc says 'miles' next to it! What browser are you using?

No, I've never seen the animation you describe, but I would like to. Is there something like that online?
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Tried it in Firefox and IE ... Ahh, it is there, it was my font color settings. I override font colors and backgrounds, so it was there, but invisible. I see it now.

No animation that I know of, I was thinking about making one. I need correct data however.

Rotation
Solar Orbit
Galaxy orbit
Galaxy movement relative to local group
Galaxy movement relative to constellation Hydra
Galaxy movement relative to ... ??? Would there be any point in using the edge of the known Universe?

Maybe from another point, like from "above" the local cluster, relative to Hydra

That would be cool.
 
robinson said:
Galaxy movement relative to ... ??? Would there be any point in using the edge of the known Universe?
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No, but it would make very good sense to use the velocity relative to the Hubble flow, or the comoving cosmic rest frame, or the cosmic microwave background radiation (CMB) - these are different ways of talking about the same thing, which has been discussed at length earlier in this thread. It is the most universal and final reference available.
 
Thabiguy said:
No, but it would make very good sense to use the velocity relative to the Hubble flow, or the comoving cosmic rest frame, or the cosmic microwave background radiation (CMB) - these are different ways of talking about the same thing, which has been discussed at length earlier in this thread. It is the most universal and final reference available.
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Uh... can you give me a point of view for them? As in, where would the camera be, looking at the Earth?
 
robinson said:
Tried it in Firefox and IE ... Ahh, it is there, it was my font color settings. I override font colors and backgrounds, so it was there, but invisible. I see it now.

No animation that I know of, I was thinking about making one. I need correct data however.

Rotation
Solar Orbit
Galaxy orbit
Galaxy movement relative to local group
Galaxy movement relative to constellation Hydra
Galaxy movement relative to ... ??? Would there be any point in using the edge of the known Universe?

Maybe from another point, like from "above" the local cluster, relative to Hydra

That would be cool.
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I believe I have some of that data. PM your email addy to me if you want it.
 
What you need are the relative angles of all of these motions.

I'll check for those.
 
Okay, using the Earth's rotational axis as our base for spherical coordinates, the Earth's orbit is at an angle of 23.439o, with the axis pointing to a position 270o round the equator (going round towards the east) and 66.55o up from the equator. The centre of the Galaxy is located 265.6o round the equator and -28.917o below the equator, with the North Galactic pole at 192.25o and 27.4 degrees above the equator, with an inclination angle of 62.6o. The Galaxy is heading towards the Hydra supercluster at a position 159o round the equator and 27.5o below the equator.
 
robinson said:
Tried it in Firefox and IE ... Ahh, it is there, it was my font color settings. I override font colors and backgrounds, so it was there, but invisible. I see it now.

No animation that I know of, I was thinking about making one. I need correct data however.
Click to expand...

If you make this (and it's good, of course), would you be interested in having a link to it on the earthmove site? I think it'd be a nice bit of extra info for our visitors.
 
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robinson said:
Uh... can you give me a point of view for them? As in, where would the camera be, looking at the Earth?
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I think what he was talking about is a reference frame for no motion. Not that we can identify a certain location, just that we can identify our speed with respect to the Big Bang.
 
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