Right. One side of the accretion disk is orbiting away from the earth so the light it emits is redshifted by the Doppler effect, and the other side is blueshifted. (The inner part of the accretion disk is falling into the black hole, but the velocity there is small in comparison with the velocity of rotation.) However, there is another, additional, redshift which is due to light losing energy as it escapes from the gravitational attraction of the black hole (or, what amounts to the same, to the time slowing effect in the neighborhood of the black hole). So on one side of the hole the Doppler shift and the gravitational shift add up and on the other side they compensate.
Anyway, there are a lot of effects in play there: the expansion of the universe is a pretty large one. And, of course, we don't know what the initial wavelength of the emitted radiation was... So to say that the light is pink because it is redshifted is a pretty big simplification.
Hmmm... Postel hasn't been dead for a year yet and already everything is changing at IANA... Sounds suspicious...
Could somebody clarify how exactly IANA, ICANN, the NICs, the NSI and ISOC are supposed to interact? (And you might as well add the IETF, IAB, IRTF and IESG to the list to make sure things are confusing enough.)
I think the part of an OS which is most central in defining its identity is not the kernel but the libc. In fact, GNU/Hurd may end up being binary-compatible with GNU/Linux because both use the same (GNU) libc. Isn't that the most important thing, i.e. what name you look for when you have a list of OS choices for a binary package? I suggest the term GNU/ELF:-).
We don't speak of GNU/BSD because BSD has its own ls, cp &al, programs. The GNU programs go in/usr/local/bin under BSD. Whereas Linux is just a kernel, it doesn't come with ls or anything like that, and therefore the GNU tools go in/usr/bin.
Also, I don't think ``what you can't change without rebooting'' is a good definition of ``central''.
Slashdot Mirror
Right. One side of the accretion disk is orbiting away from the earth so the light it emits is redshifted by the Doppler effect, and the other side is blueshifted. (The inner part of the accretion disk is falling into the black hole, but the velocity there is small in comparison with the velocity of rotation.) However, there is another, additional, redshift which is due to light losing energy as it escapes from the gravitational attraction of the black hole (or, what amounts to the same, to the time slowing effect in the neighborhood of the black hole). So on one side of the hole the Doppler shift and the gravitational shift add up and on the other side they compensate.
Anyway, there are a lot of effects in play there: the expansion of the universe is a pretty large one. And, of course, we don't know what the initial wavelength of the emitted radiation was... So to say that the light is pink because it is redshifted is a pretty big simplification.
Hmmm... Postel hasn't been dead for a year yet and already everything is changing at IANA... Sounds suspicious...
Could somebody clarify how exactly IANA, ICANN, the NICs, the NSI and ISOC are supposed to interact? (And you might as well add the IETF, IAB, IRTF and IESG to the list to make sure things are confusing enough.)
I think the part of an OS which is most central in defining its identity is not the kernel but the libc. In fact, GNU/Hurd may end up being binary-compatible with GNU/Linux because both use the same (GNU) libc. Isn't that the most important thing, i.e. what name you look for when you have a list of OS choices for a binary package? I suggest the term GNU/ELF :-).
We don't speak of GNU/BSD because BSD has its own ls, cp &al, programs. The GNU programs go in /usr/local/bin under BSD. Whereas Linux is just a kernel, it doesn't come with ls or anything like that, and therefore the GNU tools go in /usr/bin.
Also, I don't think ``what you can't change without rebooting'' is a good definition of ``central''.