Quote:
Originally Posted by Benny Chin There are many things I do not understand about Dark Matters and their properties.(...) |
Hej,
Here is light on, and enlightment about Dark Matter.
Dark matter is not needed to explain the spiral galaxies' flat rotation curves.
Dark matter is a help hypothesis that was needed to explain the flat velocity curve that was based on Doppler-shifted measurings of rotating spiral galaxies’ arms. This hitherto unintelligible anomaly was observed via calculations by Fritz Zwicky and later reconstructed by Vera Rubin from her newer confusing analyses.
They found that all the stars in the galaxies they choused to measure had the same Doppler velocity.
But their measurings were misinterpreted so, as if the spiral galaxies rotated as stiff plates with the same angular velocity over the whole galaxy’s arms.
The astronomers’ conclusion was that the centrifugal forces from the angular acceleration of the mass should increase with the square of the velocity and proportional to the distance away from its center
(F = (m*v^2) / r).
Parallel with that the galaxy's gravity should decrease proportionally with the square of the distance which should throw the outer stars out into the space
(F =G*(m*m) / r^2).
Hithereto the astronomers have mistaken orbital velocity as angular velocity.
So, the right explanation is that the orbital velocity is the same for all the stars in those spiral galaxies’ arms, which implies that when an outer star in the galaxy rotates one revolution then another star in the same galaxy’s arm at half of that distance rotates two revolutions.
-- Hence, both have the same (orbital) velocity distribution.
And as the stars' mass and velocity are the same and balancing each other in the both directions, the force in each galaxy-arm is:
Gravitation-force (F=(m*G^-2) / r) and
Centrifugal-force (F=(m* v^ 2) / r).
The mass is the same in both arms, and the velocity is the same all over the arms, which implies that the stars in the spiral galaxies’ two arms in opposite directions are in equilibrium with each other, and that the arms' angular acceleration decreases proportionally with the distance and with the arms decreasing gravitation.
Consequently – DARK MATTER IS NOT NEEDED to explain the galaxies’ rotation and gravitation – if you use the right interpretation.
See more interesting discoveries and analyses at my site:
http://www.theuniphysics.info
Ingvar, Sweden
________________________
To think free is great
To think right is greater
To think yourself is greatest