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-Why does the Sun rotate so slowly? Solar Magnetic Braking Debunked-
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Magnetic Braking
Why does the Sun rotate so slowly? Solar Magnetic Braking Debunked
Why does the Sun rotate so slowly? Solar Magnetic Braking Debunked
There is no doubt that magnetic braking exists, but does it apply to stellar evolution?
Despite sitting slap dab in the center of our solar system, the Sun has a remarkably slow rotation rate, roughly every 30 days, depending where the latitude is being measured.
That is very slow compared to the orbiting outer gaseous planets, rotating at a brisk 24 hours - or less!
According to the presently accepted accretion scenario, our early solar system came together by gravitationally contracting.
If this is the case, our primordial Sun ought to have a rotation rate far greater than that of the planets. Think of a spinning skater, pulling in their arms, rotating faster.
Consequently, our Sun’s exceptionally slow rotation is completely at odds with the Laws of Angular momentum.
Despite having a lion's share of the supposed mass and sitting in the center of the solar system, why does it rotate so slowly?
Skater spinning
This obvious inconsistency has not escaped the notice of the stellar physicists who, in order to give some kind of rationale for this observation, have inadvertently hammered a round peg into a square hole by coming up with an explanation referred to as ”Stellar Magnetic Braking.”
The story goes that the Sun inaugurated nuclear fusion in its core, simultaneously creating its external magnetic field. Because the field slammed into the leftover matter that was blown out and away by the Sun’s radiation, this is supposed to have acted as a brake, causing the Sun to lose a large proportion of its angular momentum, slowing down its rotation.
It seems like a reasonable argument at a glance, but fails to explain how planets like rapidly rotating Jupiter with its strong magnetic field and large orbiting moons, appear to be completely unaffected by magnetic braking.
Considering the estimated 5 billion years that have passed since the creation of our solar system, one should surely expect that the Jovian moons would have slowed down Jupiter’s angular momentum considerably - possibly to a point where Jupiter's rotation should have ground to a complete halt. This obviously is not the case. So where is the evidence for magnetic braking?
Spinning Jupiter with moons and powerful magnetic field
Even if we were to discard the accretion theory and adopt the contention that stars come about from gas nebulae plasma flux filaments. I would strongly suggest that within this framework, the laws of angular momentum still would apply. So, stripping away the fanciful stellar magnetic braking theory, this leaves the oh-so-slowly rotating Sun without a viable explanation.
Kepler Space Telescope
OK, Jupiter is not the Sun, so let’s look to the stars.
If stellar magnetic braking was in evidence, would one not expect to observe at least some of these stars - especially older ones - to have ground to a halt?
The death knell to the stellar magnetic braking theory comes to us, compliments of the Kepler Space Telescope which has been gathering data on thousands of rotating stars.
Not a SINGLE STAR is standing still; NO star has completely lost its angular momentum due to magnetic braking; they are ALL rotating.
Gas nebulae plasma flux filaments
This brings us back to the original question - why does the Sun rotate so slowly?
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