It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
originally posted by: ErosA433
a reply to: ImaFungi
The core is very dense, models estimate around 150 x that of water. So the material is really quite squeezed together.
The radiation released is in kenetic energy of the daughter nuclei (Helium-4) and the various gammas, positrons or electrons or neutrinos that are ejected as a result of fusion or subsequent decay. Energy isn't squeezed out as such. Different configurations of the nucleus have different stability and energy levels similar to atomic physics. Systems always want to be in the lowest state and so typically if you fuse two particles like in the sun, the resulting particle is in an excited state, and it will radiate a gamma in order to return to the ground state.
The last statement you make is closest to the model yes.
A helium atom is held together and in that configuration the mass of this system is less than 4 protons alone would be. This energy difference or mass difference is what energy is released during a decay or a fusion process. This is so called Binding energy, and is likely to do with the strong force and the exchange of gluons within the nucleus
While density is high, the material is not still not degenerate, so free flow of material is possible, even at this super high density, it is still considered a gas/fluid due to the high temperatures
We have discovered indeed gravity waves do exist just recently.
Mass and weight are different things.
But what you are kind of saying is that, you wouldn't believe measurements in the first place...
Well, we have measured it within a ring traced by the earth around the sun. It doesn't appear to change in that region. We have also pinged spacecraft in orbit around other planets in our solar system, and determined that those measurements are the same. So thats a pretty nice sphere of measurement.
upload.wikimedia.org...
Where what? The mass can typically be treated for rough calculations as a point mass at the center of gravity, and the weight is a function of the gravitational law so it varies with distance, meaning things might weigh less on a mountaintop than at sea level.
originally posted by: KrzYma
Yes I know. Unfortunately if I read the physical characteristics of the Sun I read a mass of (1.98855±0.00025)×10^30 kg
So I'm just asking WHERE ??
Gravitational law can also be used to determine mass but it's not very practical for apples, but it is practical to calculate the mass of the sun:
I would definitely don't trust the guy who sells me apples on the market without any weighing scale.
Earth's velocity, its orbital radius and the universal constant of gravity are all that a scientist needs to calculate the mass of the sun. Square "v," then multiply it times "r." Divide the resulting product by the universal constant of gravity. The quotient represents the sun's mass.
Whether the speed of light is constant is a legitimate question. We think it's constant in a vacuum but obviously the speed is affected by traveling through a non-vacuum like air. Aside from this, attempts to show the speed of light is not constant have not shown this. However there is a paper about the fine structure constant possibly having changed over time:
If EM waves do spread out over large distances many theories and models today would need a clean up.
And why would I say that you will ask, because of the EM properties, it does interact with itself under proper circumstances. Best proof of it are the slit experiments.
I am questioning the propagation velocity as well.
So, you show a graph saying that the solar system is mostly H and He and you ask why the sun is mostly H and He?
Those elements are from Super Nova explosion before the solar system, gravity created the Sun and the planets, right?
If gravity force is a property of mass, heavy elements attract stronger, how comes the Sun is mostly hydrogen and helium and not C,N, O, Fe and all in between ?
So, you show a graph saying that the solar system is mostly H and He and you ask why the sun is mostly H and He? This is the same question which was rumored to have been answered centuries ago from the leaning tower of Pisa. If you drop a ball bearing and a bowling ball from the leaning tower, do you expect the heavier bowling ball to arrive first? Because that's not what the gravitational model predicts, and this is applicable to your question...heavier things don't fall faster as a general rule,
originally posted by: ErosA433
One method of determining the speed of light is looking at the radioactive decay of ejecta from supernova. Why? Well because if we say that E=mc^2 which for all accounts works fine for us here on Earth, and look at the decay of various isotopes taking place at large distances from earth. If those decay products produce photons at the correct energy, and do it in multiple steps (most decays give multiple different energies) then you can test the c^2 part.
Observations of Supernova 1987a from memory gives us Cobalt lines, which decrease in intensity as it decays. We can check the rate of the decay, to make sure that the decay rate is the same (local passage of time measurement) and if the local speed of light is lower / higher which would result in different spectral line splittings.
As far as i have read (in the past, and just now over the last hour to refresh) all appears to work fine and point at a speed of light that is the same as we observe here.... soooo that is at least a blob about 168,000 light years away where the speed of light is the same
Are you confused between the composition of the sun's photosphere and the sun's interior? Is that the problem? Which are you referring to and what sources are you getting your information from? If your brain is filled with a lot of EU nonsense that could be why you're confused.
originally posted by: KrzYma
I see you don't get it.
Hydrogen is the most, 10^10 and carbon for example is 10^7 so for every 1000 H atoms (1 proton each) in the Sun there should be 1 atom of C ( 6 protons) and N ( 7 protons) and O (8 protons ) and other elements proportional to it's abundance.
but yeah, ignore this...
In the case where the mass is negligible compared to a larger mass, I'm saying you don't understand the formula. It's not acceleration that's proportional to m1m2, it's force.
what is your problem with gravity ? sure a fader or whatever will accelerate with the same force, they masses are negligible comparing to mass of Earth or Moon, but it is still m1*m2.
Bigger mass = stronger acceleration or are you denying this fact !
We use standard general relativity to illustrate and clarify several common misconceptions about the expansion of the Universe. To show the abundance of these misconceptions we cite numerous misleading, or easily misinterpreted, statements in the literature. In the context of the new standard Lambda-CDM cosmology we point out confusions regarding the particle horizon, the event horizon, the ``observable universe'' and the Hubble sphere (distance at which recession velocity = c). We show that we can observe galaxies that have, and always have had, recession velocities greater than the speed of light. We explain why this does not violate special relativity and we link these concepts to observational tests.
There is no reason why the abundance of chemicals in the sun should follow the pattern you set out in your post.
The evidence for seasonal variation of radioactivity on Earth is weak at best,
Your own sources tell you that if you read them carefully.
originally posted by: KrzYma
a reply to: ErosA433
The evidence for seasonal variation of radioactivity on Earth is weak at best,
please post the source if true
www.astronomynow.com...
io9.com...
phys.org...
arxiv.org...
cuthelain.wordpress.com...
Good question. Maybe the data has experimental error not yet discovered?
So is there any relationship between plutonium decay rate and heliocentric distance?
In short: No.
It would appear from 0.6 AU to 1.7 AU, there is no variation in power output (and therefore decay rate) of plutonium with distance from the Sun.
How can the terrestrial decay rate variation (as reported by Jenkins et al.) be explained if the radioactive sample on board Cassini experienced no such variation (as reported by Cooper)?
originally posted by: KrzYma
really ?
so if there is a stellar cloud full of different elements and gravity pulls those together to form a Star, only hydrogen and helium migrates to the centre of mass and create the Star and the rest of the elements are not affected by gravity ?
this is a whole new theory on gravity you propose !