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Message: <blockquote data-quote="Thunderfoot" data-source="post: 2405031" data-attributes="member: 34175">Part of the problem(s) which have to be overcome if one is to actually arrive at a conclusion is   a) Is the theory of relativity closer to a law or is it mutable  b) In the approaching zero equation are we talking about zero or absloutely zero  c) If the theory of relativity does not apply, what is the formulae by which we equate faster than light travel.  d) One could argue that increase of speed does not increase mass, an SR-71 flying at Mach 4 actually weighs less than one flying at Mach 2 - is that due to the breaking of the gravity barrier or to some unknown law of physics and motion?  e) If we could travel at that speed, name three practicle applications beyond sending probes to other galaxies, solar systems.  As for the if a man walks from the front to the back of an object moving at the speed of light and the aspects of aging - I wouldn't hold my breath.  Many scientists said that machine guns would never work on jet powered planes because the bullets move slower than the plane.  However, an as then unknown law of motion proved that theory wrong.    Objects moving inside an object moving at speed X may increase and decrease speed by Y without affecting principal laws of motion.  (ie the bullets were moving at the speed of the plane PLUS their base movement when fired from the aircraft)  So the theory of if you can't age if moving at light speed is true, moving within that speed should hold bearing on aging because your base speed would still be the speed of light + the rate of movement.  Direction has no bearing on the Theory of Relativity-  E=Mc2  Energy equals matter times the speed of light squared - Direction is not part of that equation.But then - what do I know?<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=";)" title="Wink    ;)"  data-smilie="2"data-shortname=";)" /></blockquote>

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