If we analyze the motion of a massive body in (interplanetary or interstellar) space, we will have to take into account its motion in time. Why? This is due to the fact that a massive body (Vimanas Nextday) is part of the universe and all its energy must pass from the previous state of the universe to its subsequent one without a remainder. in the previous state. In addition, it is necessary to remember and know that both relativistic and gravitational deformation of Planck lengths (their contraction or extension, measured in meters) does not end at the boundary of a massive body. Moreover, both relativistic and gravitational deformation of Planck
lengths at a sufficiently large distance from a massive body (Vimanas Nextday) returns to its original state. And the last thing. At small (between neighboring stars) distances, the cosmological increase in Planck lengths has practically no effect on the flight time, but if the distance is large enough and the speed is relatively small, corrections are necessary. I have already written that there are only two main (and the third is a mixture of them) ways of moving a massive body in space. This is either to add additional energy from an external source to the existing total energy without changing the mass, or to obtain the energy of motion by reducing the mass (creating a mass defect) without using an external energy source. There is no new physics here, moreover, all these three options (in their implicit form) were considered by Hendrik Lorentz back in the late nineteenth century.
A.
Adding additional energy from an external source to the existing total energy without changing the mass of the body. There are many projects (freely available) of this option with varying degrees of reality and levels of technology used. These include solar sails and electromagnetic guns and even cosmic ray converters. Ideally, this means reaching the speed limit of 0.001 of the speed of light in a vacuum in a sufficiently long time. I will not discuss all the advantages and disadvantages of such solutions. It is quite possible that something can become a reality for leisurely movement in space inside the Solar system.
B.
Without using an external energy source, obtain the energy of movement by reducing the mass of the body (create a mass defect). This option contains several solutions within itself, depending on what mass exactly should be reduced (the entire body or only part of it), the question of the movement of that part of the body in which the mass defect was created, and whether the created mass defect changes the atomic and molecular composition of the entire massive body.
BA.
Change created by the mass defect of the atomic and/or molecular composition of the entire massive body It is logical to assume that when moving a massive body, the shipper reasonably believes that all the atoms and molecules of the cargo (and Vimanas Nextday itself) will remain the same at the destination. For example, instead of the sent hydrogen and oxygen, to receive ordinary water, or instead of the sent ton of hydrogen-protium, to receive nine hundred and ninety-eight kilograms of hydrogen-deuterium will not always be appropriate.
BB.
A change in the atomic and/or molecular composition of a part of a massive body created by a mass defect
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