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Originally Posted by Michael Mozina
What is frustrating however is that astronomers tend to ignore a lot of the complications of astronomy when they try to calculate things like solar density. For instance their is no mention in solar density calculations of majority of the the presumed mass of our universe that is found in "dark energy". They make absolutely no allowance for Birkeland currents or electromagnetic interactions between bodies for that matter.
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Astronomers may not look for birkland currents and electromagnetic interactions, but us space physicists do.
No one has ever seen the sun electrically interact with the rest of the galaxy. We are starting to get an idea of the magnetic interactions cause a few probes are getting out towards the heliopause. The Earth sun interaction is well known also. There is no electric interaction, only magnetic, as the two fields interact. Calling the solar wind a current is wrong, it is overall electrically neutral. We would see the effect of a charge buildup if it wasnt.
Dark matter isnt taken into account in solar models because they work, and the total effect of dark matter is very minimal on a solar scale. There may be a time when the solar measurements will show what the effect of dark matter is (and come to think of it, there may be someone looking for it, it would make a good paper) but the total effect once known would be very small. Consider the size and mass of the galactic halo compared to the size and mass of the sun.