When
a person dies, the information content of the electrical firing
patterns of their neurons vanishes as this entire electrical system
shuts down, and before long, the information content stored chemically
and biologically in their synapses begins to disappear as well.
when you die all of the memories, knowledge and internal clock is gone
If
our universe is a simulation like the Matrix or something crazy like
that, physicists/astronomers would be the ones to eventually discover
this and try to break us out, like Neo! They’re much cooler when you
think of them like that haha.
The world is different than what we think and it’s marvelous.
Where did WE come from
If
our universe is a simulation like the Matrix or something crazy like
that, physicists/astronomers would be the ones to eventually discover
this and try to break us out, like Neo! They’re much cooler when you
think of them like that haha.
So particle physics is simply rearranging
conserved quantities
Nothing—they’re just numbers!”
Everything is simply information/numbers
How is everything the same if the conserved quantities are different?
What
Newton set out to explain definitely, was challenged by Einstein to
prove a lack of a definite explanation. This is coupled with the field
of Quantum Mechanics which doubles down on this idea of a “lack of
constant nature” by asserting the position of an electron is unable to
be predicted at any point in time – a state of randomness
Physics is driven by puzzles and mysteries
trying to explain the unexplainable.
we simply don’t know yet
that is scientific progress. In order to know more, we must disprove what we already know.
The
No-Hair Theorem is a conjecture about the simplicity of black holes.
They are called “bald” to reflect the paucity of information necessary
to characterise their spacetime – only three parameters at most are
needed.
The theorem is formulated to describe isolated black holes.
In
the words of physicist John Wheeler: “black holes have no hair” (hair
being a metaphor here for any messy complicated details).
a black hole can be fully characterised by three numbers: mass (M), angular momentum (a) and charge (Q).
this theorem means that physical information that enters a black hole will be lost forever
it
seems to be in direct contradiction to quantum theory in which
information is never truly lost! The conflict between the two theories
leads to the black hole information paradox.
Astrophysical black hole candidates are likely to be electrically neutral
the
extended No-Hair Theorem is valid even when the black hole is not
isolated, e.g. the black hole could be encircled by a matter disk, see
Figure 4.
A
non-isolated black hole is distorted by surrounding matter; these
distortions of the mass distribution are described by a sum of
“multipole moments”
A
black hole surrounded by a disk of matter gains two types of hair: (i)
distortions to the geometry outside the black hole and (ii) distortions
to the geometry of the black hole horizon – these distortions are called
horizon multipoles
According
to the calculation in this paper, all the higher-order horizon
multipoles (except for the mass monopole) that arise from the black
hole’s intrinsic hair are extinguished at infinity.
For
example, some alternative theories of gravity admit black hole
solutions with hair, so astrophysical observations combined with the
extended theorem could help test and constrain alternatives to general
relativity.
One of the most common misconceptions about black holes is that they are invisible
gas flowing into a black hole will frictionally heat up to millions of degrees and will become extremely luminous
the tidal disruption of an individual star after a close approach to a supermassive black hole.
the star is ripped apart by the black hole’s tidal field
evolved stars that have left the main sequence can be tidally disrupted by a pass much further away from the black hole
a star with a small radius should be swallowed whole before it can be disrupted.
As stars evolve towards the end of their life on the main sequence, they tend to expand to many times their main sequence radius
it’s much easier to disrupt a more evolved star
a star on a rather unfortunate orbit on which it will either by tidally disrupted or swallowed whole by the black hole.
These
long-duration disruption events should be observable in the next
generation of transient surveys and may be an efficient way to
characterize the stellar populations around massive black holes.
This
observation was special because it was the first time a flare had been
caught during the relatively short ramp-up phase thought to be
associated with the actual disruption event.
Previous
observed events were found during the long, slow phase of decreasing
luminosity as the black hole slowly eats the remains of the star.
transient
surveys like the Palomar Transient Factory, and the Large Synoptic
Survey Telescope are designed to find luminous but short-lived events
like tidal disruption flares, and it is certain that we will soon have a
statistical sample of tidal disruptions to study in depth.