An interesting thought regarding our current speed, page

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reply posted on 4-9-2012 @ 05:18 PM by DrZrD

The orbital motion of our solar system my be 200,000 km/hr but it is still less than 1/4000 of the speed of light. And for velocities much less than the speed of light time dilation is proportional to

dt ~ 1+(1/2)*(v/c)^2

So the answer to your question is that very little time dilation is observed even at 200,000 km/hr.

Best regards,
Z

reply posted on 4-9-2012 @ 05:29 PM by Wifibrains
Originally posted by DrZrD
post by SageBeno

The orbital motion of our solar system my be 200,000 km/hr but it is still less than 1/4000 of the speed of light. And for velocities much less than the speed of light time dilation is proportional to

dt ~ 1+(1/2)*(v/c)^2

So the answer to your question is that very little time dilation is observed even at 200,000 km/hr.

Best regards,
Z

But wouldnt you now have to add to that the speed the earth goes around the sun? Also the spin, depending on which way it spins to the direction the solar system is traveling?
edit on 4-9-2012 by Wifibrains because: (no reason given)
edit on 4-9-2012 by Wifibrains because: (no reason given)

reply posted on 4-9-2012 @ 05:29 PM by inverslyproportional

There is no "base time" or stopped "base stationary speed" as the entire universe is constantly in flux and motion. Thhere isn't a single way we have come up with to figure out what a "non moving" stationary point in space time would be, as space and time are also in constant motion.

One could try to stop relative to all matter in the universe, but we can't detect to direction and rotation of atoms at the same time, we can only detect one or the other.

So we could stop relative to the milky way, but would still be in motion relative to andromeda, and all other galaxies.

However being stopped relative to the milky way, would put us in motion relative to our solar system as it is moving around the center mass of the milky way.

So there is no such thing as stopped, relative to more than either a single atoms spin, or its direction not both, it is not possible.
edit on 4-9-2012 by inverslyproportional because: lol i wrote span and rotation instead of spin(rotation) and direction, i am silly somtimes.

reply posted on 4-9-2012 @ 06:12 PM by DrZrD

As it turns out the tangential velocity of our solar system around the center of the Milky Way was revised to be 914,000 km/hr a few years ago (much greater than 200,000 km/hr suggested by the OP). Moreover, the Milky Way Galaxy is moving through space at 2,300,000 km/hr for a combined velocity around 3,000,000 km/hr or 833 km/s. But even at the tremendous speed of 833 km/s it is still just a tiny fraction of 300,000 km/s for the speed of light.

Yes, the velocity from earths orbit around the sun must be added or subtracted from the absolute solar system velocity but at ~30 km/s it is insignificant.

Similarly, while earths gravity alone causes time slowing at the surface it is an insignificant effect. Earths rotation gives rise to relativistic rotational frame-dragging effects but these cause an even smaller degree of time dilation.

In summary, the combined time dilation effects from the Milky Way velocity through space, solar system velocity around our galactic center, earths velocity around our sun, earths gravitational space-time distortion, and earths rotational frame-dragging effects only cause an imperceptible amount of time slowing.

Best regards,
Z

reply posted on 4-9-2012 @ 06:42 PM by Wifibrains
Originally posted by DrZrD
post by Wifibrains

As it turns out the tangential velocity of our solar system around the center of the Milky Way was revised to be 914,000 km/hr a few years ago (much greater than 200,000 km/hr suggested by the OP). Moreover, the Milky Way Galaxy is moving through space at 2,300,000 km/hr for a combined velocity around 3,000,000 km/hr or 833 km/s. But even at the tremendous speed of 833 km/s it is still just a tiny fraction of 300,000 km/s for the speed of light.

Yes, the velocity from earths orbit around the sun must be added or subtracted from the absolute solar system velocity but at ~30 km/s it is insignificant.

Similarly, while earths gravity alone causes time slowing at the surface it is an insignificant effect. Earths rotation gives rise to relativistic rotational frame-dragging effects but these cause an even smaller degree of time dilation.

In summary, the combined time dilation effects from the Milky Way velocity through space, solar system velocity around our galactic center, earths velocity around our sun, earths gravitational space-time distortion, and earths rotational frame-dragging effects only cause an imperceptible amount of time slowing.

Best regards,
Z

It's very interesting, I like thinking about this stuff. So time does slow down, if we where to be going round in a complete circle is it possible we could eventually catch up to our selves given enought time with this time dilation. The symbol Ouroborus comes to mind.
edit on 4-9-2012 by Wifibrains because: (no reason given)

reply posted on 4-9-2012 @ 07:08 PM by DrZrD

No, even if we experienced an arbitrary degree of time slowing on earth we could never "catch-up" with ourselves when traveling in a circle.

Best regards,
Z
edit on 9/4/2012 by DrZrD because: grammar

reply posted on 5-9-2012 @ 04:13 AM by Wifibrains

Ok, only I saw a documentary on time travel theory, I think it was one of Morgan freemans through the wormhole, that did suggest it was possible to travel fast enough to get somewhere befor you left, by going in a circle.

reply posted on 6-9-2012 @ 07:18 PM by DrZrD

A la Einstein

There was a young girl named Bright

Who would travel much faster than light

She started one day

In the relative way,

And came back the previous night.

Winnipeg Free Press, June 12, 1931, page 58

It is not possible to time travel to the past using the physics we understand today.

Best regards,
Z

reply posted on 6-9-2012 @ 07:28 PM by Wifibrains

Hi z, now I'm confused, so if bright came back the previous night, did she go back in time because she went faster than light?

If So at the speed of light, time stops, so you would get there in no time, so you never left yet.

Slower you would no longer be there, but if you kept going round, would you catch up eventually?

"Humanity are on a voyage of self discovery". Not sure who said that, lol.

Namaste, wifi.

reply posted on 8-9-2012 @ 02:21 AM by DrZrD

The limerick is only intended to be funny, for a physicist at least. This June 1931 reference is the earliest I located but since Einstein's Special Relativity and General Relativity papers were written in 1905 and 1916, respectively, I suspect the limerick is older; the original author is unknown.

We can never know what will happen at speeds faster than light because anything with physical mass requires an infinite amount of energy to reach this speed. Regardless, the limerick is nonsensical, if Bright returned the previous night and told herself not to travel an impossible paradox occurs.

No, we cannot travel faster than light and, excluding the fantastic or unsurvivable suggestions, we cannot travel to past times.

Best regards,
Z
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