Dark Matter Might Not Exist (and maybe gravity doesn't either)

Discussion of the astronomical and cosmological aspects of a universe of motion.
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duane
Posts: 110
Joined: Sat Oct 01, 2011 5:46 pm

Dark Matter Might Not Exist (and maybe gravity doesn't either)

Post by duane » Sat Feb 08, 2014 4:27 pm

a rambling somewhat confusing article

http://www.dailygalaxy.com/my_weblog/20 ... .html#more

Dark Matter Might Not Exist"

"This past 4th of July 2013, a European team of astronomers led by Hongsheng Zhao of the SUPA Centre of Gravity at the University of St Andrews presented a radical new theory at the RAS National Astronomy Meeting in St Andrews. Their theory suggested that the Milky Way and Anromeda galaxies collided some 10 billion years ago and that our understanding of gravity is fundamentally wrong. Remarkably, this would neatly explain the observed structure of the two galaxies and their satellites.

In 2009, Zhao led An international team of astronomers that found an unexpected link between 'dark matter' and the visible stars and gas in galaxies that could revolutionize our current understanding of gravity. Zhao suggested that an unknown force is acting on dark matter.

The team believes that the interactions between dark and ordinary matter could be more important and more complex than previously thought, and even speculate that dark matter might not exist and that the anomalous motions of stars in galaxies are due to a modification of gravity on extragalactic scales."

Lou
Posts: 42
Joined: Sat Nov 05, 2011 5:25 pm

gravity

Post by Lou » Fri Mar 06, 2015 5:41 am

There is a fundemental misunderstanding of gravity. Gravity does not pull from centers of mass. Everything in the universe rotates and this creates a gravitational field due to the inertial mass being at the poles of a rotating body. Look closely at a gyroscope.

This 'field' of gravity is logarithmic and is geometrically defined by the "Circles of Apollonius". We know it as the magnetic field in disguise. This gravitational field finally explains the eliptical orbit. Gravity acts preferentially in the plane perpendicular to mass, the equatorial plane of the rotating object. Axial tilt and orbits not in the equatorial plane experience differential gravity at every instant in its orbit.

duane
Posts: 110
Joined: Sat Oct 01, 2011 5:46 pm

magnetic fields as dark matter?

Post by duane » Tue Jun 23, 2015 9:31 am

http://phys.org/news/2015-06-magnetic-f ... .html#nRlv

Magnetic Field discovery gives clues to galaxy formation process

Astronomers making a detailed, multi-telescope study of a nearby galaxy have discovered a magnetic field coiled around the galaxy's main spiral arm. The discovery, they said, helps explain how galactic spiral arms are formed. The same study also shows how gas can be funneled inward toward the galaxy's center, which possibly hosts a black hole.



"This study helps resolve some major questions about how galaxies form and evolve," said Rainer Beck, of the Max-Planck Institute for Radio Astronomy (MPIfR), in Bonn, Germany.

The scientists studied a galaxy called IC 342, some 10 million light-years from Earth, using the National Science Foundation's Karl G. Jansky Very Large Array (VLA), and the MPIfR's 100-meter Effelsberg radio telescope in Germany. Data from both radio telescopes were merged to reveal the magnetic structures of the galaxy.

The surprising result showed a huge, helically-twisted loop coiled around the galaxy's main spiral arm. Such a feature, never before seen in a galaxy, is strong enough to affect the flow of gas around the spiral arm.

"Spiral arms can hardly be formed by gravitational forces alone," Beck said. "This new IC 342 image indicates that magnetic fields also play an important role in forming spiral arms."

The new observations provided clues to another aspect of the galaxy, a bright central region that may host a black hole and also is prolifically producing new stars. To maintain the high rate of star production requires a steady inflow of gas from the galaxy's outer regions into its center.

"The magnetic field lines at the inner part of the galaxy point toward the galaxy's center, and would support an inward flow of gas," Beck said

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