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I don't think it's isolated, just that at this point, gravity is the only force that we know can have an effect there.
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Thanks! I read it all the way you do... so I'm guessing one of the later versions of Traveller added that idea. I have the LBBs from 1977 and from 1981, and T5.
T5 DOES talk about "Straight Courselines" (pg 112 of BBB2): "Gravity Sources in Real Space affect Jumpline: a straight line course cannot pass through a bubble surrounding a mass of any appreciable size..." which to me completely contradicts page 118 BBB2, which says "A ship in Jump Space is totally isolated from Real Space," and "is undetectable." If the former is true, the latter cannot be... and in my mind (and in MTU) the latter is true, NOT the former.
Seems like Star Wars hyperspace is rather cramped. It was really confusing in the last Star Wars movie The Rise of Skywalker, apparently hyperspace was done up like a maze that a Starship had to travel through, there is no rhyme or reason for it existing except as a plot device.They also had highways, which allowed the identification of chokepoints and approaches.
They are trying to make it more like the Star Wars hyperdrive. In the novels, there was something called an interdicted which was used in the Thrawn Trilogy to yank Luke Skywalker's X-wing out of hyperspace as it passed by. Thrawn was good at making educated guesses and knew which region of space Luke's X-wing had to pass through and where to place the interdicted to yank him out of hyperspace.
Entering jump is possible anywhere, but the perturbing effects of gravity make it impractical to begin a jump within a gravity field of more than certain specific limits based on size, density, and distance.
When ships are directed to exit jump space within a gravity field they are precipitated out of jump space at the edge of the field instead.
Gravity has extraordinary effects on the function of the jump drive. Jump transitions to the alternate universes of jump space are severely scrambled within the stresses of a gravity well; the transition cannot usually take place within the stresses of a gravity well. When it does, the turbulence created by the gravity well makes the result unpredictable. In some situations, the the ship is destroyed, in others, it merely misjumps.
On the other hand, there seems to be a built-in safety feature for ships trying to leave jump space within 100 diameters of a world. Ships naturally precipitate out of jump as they near the 100 diameter limit.
Note that the identical article appears in the new MgT JTAS so it is canonical for the MgT ATU...At the end of the week in jump, the ship naturally precipitates out of jump space and into normal space. The exact time of emergence is usually predicted by the ship's computer and the bridge is well-manned for the event.
So we have two sentences that make it clear that a ship must be actively engaged in leaving jumo space - i.e. the end of the week - for gravity to force the precipitation at 100D, and one sentence that mentions the rather ambiguous and contradictory final sentence...
My interpretation of that 'natural precipitation' is that precipitation from jump space does not require any action on the part of the crew or the jump drive, the jump is fixed at the start and you precipitate back into our universe after a week. If, during that precipitation, you are too close to a star or planet you will precipitate at the 100D limit.
That said the exit from jump space is determined by the machinery at the start, not some intervening body in our universe that happens to be 3 days along an imaginary jump line...
No, the uncertainty principle is for quantum phenomena, general relativity is not quantum.The Uncertainty Principle seems to apply.
You observe from a distance and then plot future positions - which is why jump is difficult to compute. Note that once you have made a jump and you are in the destination system you can make your jump much more accurate, hence the difference between jump cassettes and the generate programBecause you can't observe what's happening at the exit, when you calculate jump coordinates.
No it doesn't. The distance of the jump is determined before you enter jump space.Velocity, if such can be applied in jumpspace, stretches to the length of the jump.
That's because we don't understand the jump space dimensions or their physics.And we're not sure where the starship is within the confines of jumpspace.
It's possible jump technology partially utilized quantum physics.
String theory could be the connection between entry and exit points.
If there's a canonical explanation, it will be fun to deconstruct it.
CT. In JTAS.
I think a passing nod was given in the original LBBs... let me check
YES. Book 3 page 9 mentions both ringworlds & "sphereworlds"