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Jul 29 2011 08:21am
Quote (five33 @ Jul 29 2011 08:55am)
i think most think it will go super giant and grow to the orbit of Venus  before collapsing on to its self

True. The sun's death is already well-known. Once it finishes burning Hydrogen and begins burning Helium at its core, the gravitational force will no longer be enough to contain the outward forces from all of the energy released from Helium fusion. The sun will swell up and become a Red Giant and engulf much of the inner solar system (I've read somewhere it'd swallow Earth as well and end somewhere between Earth's and Mars's orbits) before finally fizzling out and shrinking back down to burn out the rest of its days as a white dwarf. The sun isn't massive enough to go supernova nor collapse into a singularity.

The whole solar death phase from swelling to shrinking back down will take millions of years though, so it won't be some instantaneous event like we might expect.
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Jul 29 2011 06:46pm
Quote (impulse155 @ Jul 27 2011 03:46am)

In fact, most evolutionary biologists believe there is a higher power that created them.


Where did the higher power come from? This entire line of logic can regress infinitely.

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Jul 29 2011 07:41pm
it comes from the mass that is lost during a fusion reaction
e = mc^2 bro
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Jul 29 2011 10:36pm
Quote (bentherdonethat @ Jul 26 2011 11:47pm)
It would be pretty arrogant to say that we knew exactly what caused it if we didn't have any evidence to support such a claim, wouldn't you say?


This is great. Ily.
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Aug 1 2011 02:50am
Quote (impulse155 @ Jul 26 2011 08:47pm)
Stubled upon this question. Dont know if its just too obvious to me or if im overlooking something, but..
If all organisms obtain energy from the sun. And according to the conservation of energy, energy is not created nor destroyed, how does the sun obtain its energy?


not all, you forget at the farthest depths of the ocean there are creatures who havent come within hundreds of feet of sunlight.
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Aug 1 2011 02:57pm
at the beginning of time there was one singular point (no size) and infinite energy...everything's been getting colder and farther apart ever since
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Aug 2 2011 01:43pm
Quote (Tummy @ Aug 1 2011 01:50am)
not all, you forget at the farthest depths of the ocean there are creatures who havent come within hundreds of feet of sunlight.


this is true
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Aug 8 2011 04:54am
Quote (impulse155 @ Jul 27 2011 02:47pm)
Stubled upon this question. Dont know if its just too obvious to me or if im overlooking something, but..
If all organisms obtain energy from the sun. And according to the conservation of energy, energy is not created nor destroyed, how does the sun obtain its energy?


didnt read the thread , so not sure if someone has posted this already , but ...

#1 ) not all organisms obtain their energy from the sun
#2 ) the whole " conservation of energy " thing is highly misleading , " energy " is created all the time ( the 2 examples that stand out the most are zero point energy and hawking radiation ( ok , so hawking radiation comes from zero point energy ) )
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Aug 8 2011 05:55am
Quote (Matao @ Aug 8 2011 06:54am)
didnt read the thread , so not sure if someone has posted this already  , but ...

#1 ) not all organisms obtain their energy from the sun
#2 ) the whole " conservation of energy " thing is highly misleading , " energy " is created all the time ( the 2 examples that stand out the most are zero point energy and hawking radiation ( ok , so hawking radiation comes from zero point energy ) )

I don't know about Zero Point Energy, but I know in the case of Hawking Radiation, when energy is "created" and emitted from a black hole, it's because a particle containing negative energy was also created at the same time and fell into the black hole, causing it to lose mass. There is no net change of energy, so it's not really created.
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Aug 8 2011 06:16am
Quote (bentherdonethat @ Aug 8 2011 11:55pm)
I don't know about Zero Point Energy, but I know in the case of Hawking Radiation, when energy is "created" and emitted from a black hole, it's because a particle containing negative energy was also created at the same time and fell into the black hole, causing it to lose mass. There is no net change of energy, so it's not really created.


thats the basic point , isnt it
that when we say " you cant create energy " , what we really mean is , " we cant add to the average energy "
we can have as much " energy " as we want , as long as half of it is opposite to the other half

we live in a zero energy universe
the net energy of our universe = zero
and as long as the net remains at zero , we can have as much of everything as we want ....
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