Recent content by zylon

The total gravitation of the neutron star is the same as anything else of the same mass. But the force is concentrated on the smaller surface area. So if the neutron star has 10^-5 the diameter of the sun with the same mass as the sun, its surface area would be 10^-10 of the sun, and its...

Then the center of the universe is "under" every point in space (since the big bang), the same way that the center of the Earth is "under" every country on earth. The fourth dimension of space visualized here may not be physically real, but it should clear up the "center of the universe"...

o The outside observer would also not see the hole's mass decrease, if he is destroyed in one hour (i.e. the time you said the traveler would exist in his own time frame inside the hole). Since my entire question is based on "when" the traveler hits the singularity, saying that the reason the...

My addition of Hawking radiation (HR) was only to transform the hole into a clock in case times in the far future were relevant. If so, both the outside observer and the traveler inside the hole could match time events by calculating the loss of the mass (or radius) of the hole due to HR. Only...

First, the event of the outside observer saying "hey, the black hole isn't there anymore" (e.g. observed to have exploded) can be by definition matched to the event of the traveler first noting that he is no longer surrounded by an event horizon, thus connecting the first moments of the black...

Unless I am overlooking something, the way to compare spatially separated times is by comparing mutual events. In this case, the mutual event is the absence of the black hole, as what the situation would eventually become if hawking radiation continues until all the mass of the hole is depleted...

I mentioned Hawking radiation because , although I know that far from the hole (external time) the lifetime of the hole is practically eternal, I do not know how time behaves inside the hole. For all I know, the internal hour it takes for the traveler to reach the singularity could be longer...

Consider a black hole with a radius of one light hour (as measured from outside, stationary observer), non rotating, having singularity in center, is radiating hawking radiation, and has no outside interference. Assume standard mathematical theory. Traveller A is falling towards hole from...