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Indigent
velocities does not add linearly like that
math.ucr.edu...
en.wikipedia.org...
swanne
As most of you already know, matter may not reach light speed, for it would take an infinite amount of energy to move even a single atom at this speed. Let alone pushing matter at a speed faster then light. Keeping that in mind, technically, though, there is a rather interesting detail.
Imagine two trains going in opposite ways. One train goes North at 60 mph, and the other train goes South at 60 mph. Each single trains are spending energy to reach 60mph only, and are not spending energy to reach 120 mph. Relative to each other, though, the trains are in fact going at 120 mph.
Now imagine two spacecrafts going in opposite ways. One spacecraft goes towards the Taurus constellation at 0.75 c (three quarters of the speed of light), and the other goes towards the Sagittarius constellation at 0.75 c. According to my math, this makes each spacecraft travel, relative to another, at 1.5 c (one and a half the speed of light).
This has limited practical implication, of course. Following this logic, to make a ship leave Earth at a FTL speed, one would have to push the ship in one direction at over 0.5 c - and push the entire solar system in the opposite direction at over 0.5 c.
But academical implication is that technically, the speed for an object, traveling relative to an (albeit moving) observer, may in fact relatively easily exceed the speed of light. It could be possible, in such condition, to have objects seemingly travel faster than light - and bend space-time accordingly.
Food for thought.
Swan
edit on 8-2-2014 by swanne because: (no reason given)
As already pointed out, your math is flawed, because you can't add relativistic velocities like that.
swanne
Now imagine two spacecrafts going in opposite ways. One spacecraft goes towards the Taurus constellation at 0.75 c (three quarters of the speed of light), and the other goes towards the Sagittarius constellation at 0.75 c. According to my math, this makes each spacecraft travel, relative to another, at 1.5 c (one and a half the speed of light).
We use standard general relativity to illustrate and clarify several common misconceptions about the expansion of the Universe. To show the abundance of these misconceptions we cite numerous misleading, or easily misinterpreted, statements in the literature. In the context of the new standard Lambda-CDM cosmology we point out confusions regarding the particle horizon, the event horizon, the ``observable universe'' and the Hubble sphere (distance at which recession velocity = c). We show that we can observe galaxies that have, and always have had, recession velocities greater than the speed of light. We explain why this does not violate special relativity and we link these concepts to observational tests.
swanneNow imagine two spacecrafts going in opposite ways. One spacecraft goes towards the Taurus constellation at 0.75 c (three quarters of the speed of light), and the other goes towards the Sagittarius constellation at 0.75 c. According to my math, this makes each spacecraft travel, relative to another, at 1.5 c (one and a half the speed of light).
The Higgs Field is an invisible energy field that exists everywhere in the universe. The field is accompanied by what may be a fundamental particle called the Higgs Boson, which it uses to continuously interact with other particles. As particles pass through the field they are endowed with the property of mass, much as an object passing through treacle (or molasses) will become slower
hyperrman
reply to post by swanne
I love seeing discussions with theories about light-speed travel. I hope one day some random person figures it out and posts it on this website and it goes more crazy than Miley Virus.
Nonetheless, I fear we, as a somewhat technically limited society, will never understand magnetic displacement and energy usage enough, in my lifetime, to enjoy the many benefits of intergalactic travel.
I think we are too hooked on the idea of propulsion and not enough on phase-shifting...then again, what could I know?
I would settle for interstellar travel, more than enough in this galaxy to keep humans busy.