Newby post warning. The 1/r cubed term n general relativity reminds me of near field in electromegnetics. Could this be used as a simpler GR? Simpler than fancy dimensional geometry that is.


Definitely! Though it depends a bit on what you want to do. If you want to calculate orbits in GR around ...

Just wanted to say that your images are as amazing as always, Aborygen. I especially like your radio galaxy.

Is 9 million parsecs a big number? I have never done that before


9 million parsecs is 29.4 million light years. (There are 3.26 ly to a parsec.) And that's a little more than 10 times the distance to the Andromeda galaxy. Distant in comparison to nearby galaxies, though not that far compared ...

Pretty much. Let me know when some of these alien materials are disseminated to universities for study by civilian scientists. Oh, the government would never risk it going public and potentially getting into the hands of our enemies? How convenient for a conspiracy theory.

In the meantime, I think ...

This might get a little complicated, but if you have a spinning Kerr black hole with two horizons (the event horizon and the Cauchy horizon) does that change anything as far as how long you could survive before hitting the singularity? Would you make it to the Cauchy horizon or would you die ...

I'm wondering what I heard when I saw the Perseids. I guess it could be a bolide. I see a few fireballs almost every year with the Perseids so one of them could have made that noise as they burned up?
Previous discussion on this subject: UFO Sightings and Possible Explanations - Page 4 - Space ...

Thanks Wat-- so the idea of being able to reproduce some of the information that fell into a black hole into its original form sounds like it would be extremely unlikely, the most we can do is perhaps be able to say what might have fallen into it? Could we ever achieve a level of precision where ...

Could one of these showers also produce meteorites?

Not even a chance. The meteor velocity for both showers is far too high; they burn up completely at very high altitude.

If there is no way to unscramble the information, how is that different from information not lost?

The paradox was that if Hawking radiation is purely thermal/blackbody radiation, there would be no information about what went into the black hole hidden in that radiation at all. But the ...

Wow this is very interesting-- from your other post I think you implied that it would be possible to unscramble the information but it's very impractical to do so, Wat? Is there a way to calculate how much energy it would take to unscramble a given amount of information?
Very impractical, indeed ...

Not necessarily... the number and size of prominences does not correlate to sunspot number that much. This is because there are several kinds of prominences, some of which are not related to active regions. Those ones tend to have longer lifespans (so they're more likely to be around at a randomly ...

Question Wat, for a spinning Kerr black hole with a ring singularity, would it be less lethal and perhaps even navigable because of that spinning motion?

In the idealized mathematical extension for a Kerr black hole, sure, but in reality, no. You would be destroyed by the mass inflation ...

I think the black hole information paradox has already been solved, although the "solution" is still being investigated. What it boils down to is that black holes don't evaporate because that would violate quantum mechanics central tenet that information cannot be destroyed

No, black holes do ...

It's amazing this is happening now and when is solar max, Wat, is it close to the time of the solar eclipse next April? It could be even more spectacular than normal!
Yes, the corona looks much different for eclipses near solar max than near solar minimum. There are more active regions, and more ...

The amazing thing is that it actually landed inside a person's house, the odds of that happening must be incredibly low.
Quite low, but more than once. Many meteorites have been documented falling onto structures, cars , and even a mailbox . Meteorites that do this are sometimes called ...