Main Question or Discussion Point
Can someone tell me, how fast is our solar system moving in space relative to a static coordinate system in space?
however, it is moving right ?Originally posted by russ_watters
100,000,000,000,000,000,000,000 mph with regard to the Russ Universal Coordinate System (RUCS)
Um, if you didn't get the sarcasm, based on Einstein's relativity, there is no static coordinate system in space.
Yes, you can find a speed for the solar system based with respect to any object you want. But most would be arbitrary and/or meaningless. meteor's example of using the center of the galaxy is about the best we can do. There is nothing further away that makes sense to use as a center point.Originally posted by Saint
however, it is moving right ?
movement is defined by speed and acceleration,
if no static coordinate, what about Relative coordinate?
Originally posted by thermonuclear
In Einstein’s relativity there is no claim that a static coordinate system does not exist, since every coordinate system can be defined to be static with respect to some other. The point is, whether it exists a coordinate system which can be considered as ‘static’ with respecto the observable universe. From the point of view of Einsteins relativity principle, such a coordinate system would be as arbitrary as any other, but from the point of view of the question placed here it would be surely the best one. This coordinate system turns out to be the CMB (Cosmic Microwave Backgound). If one takes enogh amount of matter, it’s center of mass will in rest relative to the CMB. This has already been proven in studies after Lauer and Postman in 1994. The velocity of the solar system can be derived from the dipolar anysotropy of the CMB and is about 600 km/s in the direction of the geat attactor, a colossal matter structure far behind the milky way.
The CMB rest frame is the standard one to use in Cosmology.Originally posted by thermonuclear
May be I misunderstood both posts after mine, but I think I've to disagree, if you belive that the possibility of defining the CMB as a reference frame in rest to the observable universe, means that the relativity principle has to be revised.