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Offline dentstudent

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How fast is the earth moving...
« on: 10/12/2008 07:31:51 »
...if you combine all of the various orbits together?

We know how fast the earth is moving around the sun, but is it possible to add together the orbit around the sun, the solar system's orbit around the Milky Way, the Milky Way's orbit...and so on to give a single figure for the earth?

Thankyou!


 

Offline RD

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How fast is the earth moving...
« Reply #1 on: 10/12/2008 09:15:27 »
Quote
How fast is the earth moving... 

relative to what

Quote
We know how fast the earth is moving around the sun, but is it possible to add together the orbit around the sun, the solar system's orbit around the Milky Way, the Milky Way's orbit...and so on to give a single figure for the earth?

Some of these motions will be in opposite directions, e.g. for half the year Earth's orbit around the sun will be in the opposite direction to the solar system's orbit around the galactic centre.   [cf apparent retrograde motion of planets when viewed from Earth].
« Last Edit: 10/12/2008 09:22:50 by RD »
 

Offline Madidus_Scientia

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How fast is the earth moving...
« Reply #2 on: 10/12/2008 09:21:51 »
It's all relative.
 

Offline dentstudent

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How fast is the earth moving...
« Reply #3 on: 10/12/2008 09:28:28 »
Mmmm, yes I thought that the relatives might be an issue. Is it not possible to somehow "mark" where we were, and then identify the new coordinates some time later? Then assess the time and distance relative to the first mark?
 

Offline Madidus_Scientia

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« Reply #4 on: 10/12/2008 11:21:55 »
I don't think so, because the mark itself can only be relative to something else, there is no absolute static point
 

Offline xersanozgen

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How fast is the earth moving...
« Reply #5 on: 10/12/2008 12:14:37 »
29


Thanks for this question.
It is important. Generally we think world-centrically and human-centrically. But human is a poor companient of life and universe. Choosing the human or world for reference is a primary or primitive approach. We must want to think isolated from observer and the situation of observer.

If we would be on location out of universe and if we want to find the speed of earth, the answer will may be universal. And universal definitions and solutions have high importance. To see the entire of picture about universe and life is better and scientific. For example the velocity of light is according to out of universe. But we think it is according to world or any frame. If we find a relation between light and its source (or observer) we must the speed of them according to most external system like light's.

We are on the smallest matruska. Our perceivings and thinkings may be not universal. We must think universal. Question of this topic is important


The expanding speed of universe is 180 000 km/sec at present. We are dragged by this value of speed on a giant freezbe
« Last Edit: 10/12/2008 17:14:37 by xersanozgen »
 

lyner

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How fast is the earth moving...
« Reply #6 on: 10/12/2008 16:01:05 »
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The expanding speed of universe is 180 000 km/sec.
Between which two points?
 

Offline xersanozgen

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How fast is the earth moving...
« Reply #7 on: 10/12/2008 17:28:07 »
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The expanding speed of universe is 180 000 km/sec at present.
Between which two points?

Nice question. This value is for present time. It is a function by time. The definition like "Between two points" is not significant.
Perhaps the speed may be significant according to cosmic units (super clusters of galaxies). In other words the radius of universe is increasing 180 000 km per second.
« Last Edit: 10/12/2008 17:30:20 by xersanozgen »
 

Offline dentstudent

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How fast is the earth moving...
« Reply #8 on: 11/12/2008 07:26:53 »
Quote
The expanding speed of universe is 180 000 km/sec at present.
Between which two points?

Nice question. This value is for present time. It is a function by time. The definition like "Between two points" is not significant.
Perhaps the speed may be significant according to cosmic units (super clusters of galaxies). In other words the radius of universe is increasing 180 000 km per second.

This value must surely be the outer edge of the radius of the universe, since not all nodes along the radius can be moving out at this speed?
 

Offline xersanozgen

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How fast is the earth moving...
« Reply #9 on: 11/12/2008 12:59:35 »
Quote from: dentstudent

This value must surely be the outer edge of the radius of the universe, since not all nodes along the radius can be moving out at this speed?

In my opinion the expanding speed of universe is a bit smaller than "c" at past since the time Tm. Tm is the being moment for the first cosmic units.

But the expanding speed of universe is increasing according to some astronomers. I could not understand this and ı want to know the details of this interpretation.
 

lyner

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How fast is the earth moving...
« Reply #10 on: 11/12/2008 18:44:26 »
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In other words the radius of universe is increasing 180 000 km per second.
So where is the edge?
 

Offline lightarrow

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How fast is the earth moving...
« Reply #11 on: 11/12/2008 21:06:55 »
...if you combine all of the various orbits together?

We know how fast the earth is moving around the sun, but is it possible to add together the orbit around the sun, the solar system's orbit around the Milky Way, the Milky Way's orbit...and so on to give a single figure for the earth?
As others said: relative to what? If you intend to refer to Cosmic Background Radiation, here they say our speed is ~ 700 km/s:

http://www.knowledgerush.com/kr/encyclopedia/Cosmic_Microwave_Background/
 

Offline xersanozgen

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How fast is the earth moving...
« Reply #12 on: 11/12/2008 21:12:04 »
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In other words the radius of universe is increasing 180 000 km per second.
So where is the edge?

The code "edge" is not mine. But I have not a problem about this code. The spherical surface has thickness. I guess it is 600 000 000 ly.
 

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How fast is the earth moving...
« Reply #12 on: 11/12/2008 21:12:04 »

 

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