1. In that case the relativistic velocity addition rule applies. 2. StuRat probably meant " relativistic velocity ". 3. This geometry, in turn, can be inferred from the addition law of relativistic velocities . 4. As for relativistic velocity addition itself, it is a mathematically necessary consequence of Einstein's assumptions. 5. The above formulae constitute the relativistic velocity addition and the Thomas rotation explicitly in the general Lorentz transformations. 6. Achieving relativistic velocities is difficult, requiring advanced forms of spacecraft propulsion that have not yet been adequately developed. 7. If the particle is moving at a relativistic velocity , the usual relativistic corrections for time dilation must be made. 8. This motion is presumably an optical illusion caused by the relativistic velocity of the jet, and not true superluminal motion. 9. During the voyage, the crew enjoyed the benefits of relativistic velocities ; for them, it is the year 2296. 10. :As you say, there would be a big problem if the spacecraft hit anything when going at relativistic velocities .
