Earth's movement through space. 500 miles per second?

[Keatah]

Considering this video (it seems sensible), the Earth is blasting through space at 1.9 million mph, or a little over 500 miles every second.

How does this affect local speed-of-light experiments? And does GPS need to consider this in its calculations?

http://www.youtube.com/watch?feature=endscreen&v=G7CwbCEwT_c&NR=1

 

[Hielor]

Considering this video (it seems sensible), the Earth is blasting through space at 1.9 million mph, or a little over 500 miles every second.

How does this affect local speed-of-light experiments? And does GPS need to consider this in its calculations?

http://www.youtube.com/watch?feature=endscreen&v=G7CwbCEwT_c&NR=1

500 miles/second is only .002% of the speed of light.

Not significant enough for relativity effects to start happening, I think.

Certainly, the gravitational effects of relativity are probably more of an impact on things like GPS than Earth's velocity is.

 

[tl8]

Yes, GPS is a well known application of relativity.

 

[Artlav]

Considering this video (it seems sensible), the Earth is blasting through space at 1.9 million mph, or a little over 500 miles every second.

How does this affect local speed-of-light experiments? And does GPS need to consider this in its calculations?

Hm?
Wasn't the failure Michelson–Morley experiment (an attempt to measure the speed of Earth wrt to the rest frame of reference) an indication that no such speed can have effect in our frame of reference?

The whole relativity spread from the observation that there is no apparent common frame of reference, and any speed we have wrt the galaxy for example, does not affect the speed of light or other phenomena in our own frame of reference.

 

[Keatah]

ah yes of course I must still be drunk - little

 

[garyw]

I thought GPS needed to correct for relativity not because of the Earths motion through space but because of the distance between the GPS Tracker and the NAVStar satellites?

 

[ED_4]

I thought GPS needed to correct for relativity not because of the Earths motion through space but because of the distance between the GPS Tracker and the NAVStar satellites?

http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html

 

[RisingFury]

ah yes of course I must still be drunk - little

Either that, or you were writing the comment at 4 am in the morning... right? :lol:

 

[Arrowstar]

I thought GPS needed to correct for relativity not because of the Earths motion through space but because of the distance between the GPS Tracker and the NAVStar satellites?

I believe the speed of the GPS vehicles in orbit around the Earth must be considered to properly compute a navigation solution.

 

[tblaxland]

I believe the speed of the GPS vehicles in orbit around the Earth must be considered to properly compute a navigation solution.

Yes, but it is noteworthy that the gravitational time dilation requires a larger correction than the relative velocity time dilation.

 

[Notebook]

Odd, I grew up thinking that the Earth's orbital velocity was about 18 Miles per second?

N.

 

[asbjos]

Odd, I grew up thinking that the Earth's orbital velocity was about 18 Miles per second?

N.

Yes, with the Sun orbiting the Milky Way at 220 km/s (something like 135 miles/s), it has to be the speed relative to the Andromeda Galaxy, or something...

 

[Artlav]

it has to be the speed relative to the Andromeda Galaxy, or something...

Wrt microwave background radiation, i presume. Doppler shift relative to it indicates the velocity relative to the average of all the mass of the universe's motion.