Black Holes, Dark Stars, and Garbage Cans

Dear G=EMC^2 Glazier:

G=EMC^2 Glazier wrote:
HJ you are going by earth gravity time,and your
missing my main point and that is the space crew
out side the BH will make the trip

Your space crew "orbitting just outside the event horizon" will be
bombarded by very high intensity radiation from the Universe at large.
If you want the full 110 million years to pass in a week (say), this is
a gamma of about 6x10^9. Now take the power of even the CMBR, and its
temperature for the astronauts climbs to much hotter than the surface
of the Sun, and it would be fully visible for half (?) of the sky.
They will cook, assuming they don't simply get caromed into the BH
first.

I'm not even sure such a high gamma orbit is even stable for a material
ship.

Besides, the rest of Milky Way also makes a similar rotation, so not
much difference in what you'd see around you, right?

David A. Smith

David we can't see into the bright hub of the galaxy. We can't see
looking straight across the disk. Being on the other side gives us the
view we are missing. I was just using gravity to slow down time for
the space ship crew. Best to keep in mind the amount of work they can
perform has slowed down relatively. They get no free lunch. That don't
have extra time on their hands. Bert

G=EMC^2 Glazier wrote:
David we can't see into the bright hub of the galaxy. We can't see
looking straight across the disk. Being on the other side gives us the
view we are missing. I was just using gravity to slow down time for
the space ship crew. Best to keep in mind the amount of work they can
perform has slowed down relatively. They get no free lunch. That don't
have extra time on their hands. Bert


Bert, by the time we got around to the other side of the galaxy, those
stars on the other side would have moved around to this side so we
still couldn't see them. Might be able to see what is beyond the other
side of the galaxy though.

Double-A

Double-A I'm not predicting what will be seen in 110 million years
later. I'm only saying we will have a outer view once we are on the far
(other side of the galaxy hub This begs the question "How much of our
viewing is blocked now?"Bert

"D" == DarkStar writes:

D I was just thinking how nice it would be to have a small black hole
D in my kitchen so that i can use it as a garbage can and save the
D $200 per year that i pay for trash service. You just got to be
D careful not to put your fingers near the hole when you throw things
D away. Maybe those LHC people at CERN can create these cheaply so
D we can all have one in our kitchens.

Old idea. There's a science fiction story (and possibly a journal
article or two) about how a sufficiently advanced civilization could
orbit a black hole and use it as both a garbage dump and a power
source.

--
Lt. Lazio, HTML police | e-mail:
No means no, stop rape. | http://patriot.net/%7Ejlazio/
sci.astro FAQ at http://sciastro.astronomy.net/sci.astro.html

If I compressed all the beer cans' I went through in the past 59
years,and compressed them to the size of a bucky ball they would fall
through the kitchen floor go past the Earth's center go all the way and
stop 5 feet from breaking through the surface of China. It would fall
back and come up 10 feet short (under my kitchen floor) and fall back
again. The reality is my beer cans are a pendulum bob. To tiny and heavy
to be held up. Gravity is the Bucky ball's great gravity,and the Earth's
gravity is the only force. The black hole bucky ball is not part of
our universe,and is not subject to its laws. However it could swallow
the Earth making it the size of a pea,and that would make the Earth a
black hole. But not to worry the Moon would still go round and round
this pea size black hole,and it would go around the Sun as it is doing
now. Reality is the only change was mass density,and its rate of spin
Beeert

G=EMC^2 Glazier wrote:
If I compressed all the beer cans' I went through in the past 59
years,and compressed them to the size of a bucky ball they would fall
through the kitchen floor go past the Earth's center go all the way and
stop 5 feet from breaking through the surface of China.


Especially considering all those earlier heavy steel cans!


It would fall
back and come up 10 feet short (under my kitchen floor) and fall back
again. The reality is my beer cans are a pendulum bob. To tiny and heavy
to be held up. Gravity is the Bucky ball's great gravity,and the Earth's
gravity is the only force. The black hole bucky ball is not part of
our universe,and is not subject to its laws. However it could swallow
the Earth making it the size of a pea,and that would make the Earth a
black hole. But not to worry the Moon would still go round and round
this pea size black hole,and it would go around the Sun as it is doing
now. Reality is the only change was mass density,and its rate of spin
Beeert


Wouldn't the tidal interactions change? There would be no ocean water
to slosh around anymore. Maybe the Moon would stop drifting away.

Double-A

Double-A There are other reasons other than tides that make objects
orbiting move further apart. Bert