30 Jan 07
Originally posted by GinoJAh. Then let me explain.
It means confusing BS.
The universe will probably eventually "die". Either entropy will increase to maximum with no potential energy available, or the universe will collapse back into a singularity. Maybe something else will happen; astronomy is not my field. However if one of those two events were to happen, they would probably kill any organism still alive at that time. Thus true immortality would need to be able to live beyond these events.
30 Jan 07
Originally posted by AThousandYoungB😕
Ah. Then let me explain.
The universe will probably eventually "die". Either entropy will increase to maximum with no potential energy available, or the universe will collapse back into a singularity. Maybe something else will happen; astronomy is not my field. However if one of those two events were to happen, they would probably kill any organism ...[text shortened]... l alive at that time. Thus true immortality would need to be able to live beyond these events.
02 Feb 07
Actually, the Universe is still expanding, but both of your scenarios will happen. After the Universe stops expanding, gravitational forces will pull the universe into a singularity.
The planet earth will long be destroyed before this happens due to the extermination of the sun, which through gravitational forces will make it expand and swallow up the inner planets before it collapses and becomes a neutron star or a black hole.
This will happen in approx 50 milion years from now.
02 Feb 07
Originally posted by Chessplaya548For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. Within the black hole is a singularity, an anomalous place where matter is compressed to the degree that the known laws of physics no longer apply to it.
Actually, the Universe is still expanding, but both of your scenarios will happen. After the Universe stops expanding, gravitational forces will pull the universe into a singularity.
The planet earth will long be destroyed before this happens due to the extermination of the sun, which through gravitational forces will make it expand and swallow up t ...[text shortened]... becomes a neutron star or a black hole.
This will happen in approx 50 milion years from now.
02 Feb 07
Originally posted by GinoJThe scary thing about black holes is that they are not stationary. They can roam , swallowing up anything in its path. Because they cannot be seen, we wouldn't know we were under the influence until it was way too late.
For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. Within the black hole is a singularity, an anomalous place where matter is compressed to the degree that the known laws of physics no longer apply to it.
Once the atmosphere is stripped away, in particular the Van Allen belts, the sun's unfettered radiation would cook this planet, so we wouldn't even have the experience of being stretched out into infinity. Out toasted carcasses would though.
Not that I wanted to.....
😳
02 Feb 07
Originally posted by Chessplaya548In theory, no object within the event horizon of a black hole can ever escape, including light. However, black holes can be inductively detected from observation of phenomena near them, such as gravitational lensing, galactic jets, and stars that appear to be in orbit (typically with short orbital periods of only a few hours or days suggesting a massive partner) around a point in space where there is no visible matter.
The scary thing about black holes is that they are not stationary. They can roam , swallowing up anything in its path. Because they cannot be seen, we wouldn't know we were under the influence until it was way too late.
Once the atmosphere is stripped away, in particular the Van Allen belts, the sun's unfettered radiation would cook this planet, so ...[text shortened]... ched out into infinity. Out toasted carcasses would though.
Not that I wanted to.....
😳
02 Feb 07
Originally posted by GinoJdark matter is detected the same way.
In theory, no object within the event horizon of a black hole can ever escape, including light. However, black holes can be inductively detected from observation of phenomena near them, such as gravitational lensing, galactic jets, and stars that appear to be in orbit (typically with short orbital periods of only a few hours or days suggesting a massive partner) around a point in space where there is no visible matter.
02 Feb 07
Originally posted by Chessplaya548Perhaps more convincing, a technique has been developed over the last 10 years called weak lensing which looks at microscale distortions of galaxies observed in vast galaxy surveys due to foreground objects through statistical analyses. By examining the shear deformation of the adjacent background galaxies, astrophysicists can characterize the mean distribution of dark matter by statistical means and have found mass-to-light ratios that correspond to dark matter densities predicted by other large-scale structure measurements. The correspondence of the two gravitational lens techniques to other dark matter measurements has convinced almost all astrophysicists that dark matter actually exists as a major component of the universe's composition.
dark matter is detected the same way.
05 Feb 07
Originally posted by GinoJThose are not your words.
Perhaps more convincing, a technique has been developed over the last 10 years called weak lensing which looks at microscale distortions of galaxies observed in vast galaxy surveys due to foreground objects through statistical analyses. By examining the shear deformation of the adjacent background galaxies, astrophysicists can characterize the mean distributio ...[text shortened]... physicists that dark matter actually exists as a major component of the universe's composition.