Re: dark matter question

On Feb 23, 2:00 pm, "gb6...@xxxxxxxxx" <gb6...@xxxxxxxxx> wrote:
On Feb 23, 11:31 am, "Bob Jenkins" <bob_jenk...@xxxxxxxxxxxxxxxx>
wrote:





The milky way has 20x (400x?) more dark matter than normal matter.

The sun moves around 217 km/sec around the galactic core. Something
going much faster than that is going to have escape velocity, and
leave the galaxy. Neutrinos travelling near the speed of light will
leave the galaxy, so the milky way's dark matter isn't neutrinos.

If a particle of dark matter passes a star, they'll deflect each other
gravitationally, with energy and momentum conserved. Gases do the
same thing, you could think of the star and the dark matter particle
as gas particles. In a gas, particles tend towards the same energy
("temperature"). Barnard's star is going about 140 km/sec relative to
the sun.

If dark matter particles are light, oh, lighter than Jupiter, this
start/darkmatter gas is going to end up giving the dark matter
particles speeds much greater than the stars. This may take awhile,
because gravitational deflection is less the faster things go (the
earth orbits the sun at 29km/sec). The dark matter particles will
pick up speed until they leave the galaxy. The stars will experience
drag, tending toward the galactic plane and galactic center.

That suggest dark matter particles (blobs, objects) are heavy. If
they weren't, they wouldn't stay in the galaxy for long. If they
aren't heavy, perhaps we can see some evidence of drag on stars moving
fast relative to their surroundings.

Gravity. Why can't people get it. Gravity builds tied to a spiral
galaxy.
One takes a large volume of mass and rotates it, gravity arises.
This gravity curves the paths of all objects moving into the vicinity
of a spiral galaxy toward its' direction of rotation. The faster the
galaxy
rotates, the stronger this gravity forms. It is all of space in the
vicinity
of a spiral galaxy rotates. That rotating space curves light, because
it
is what gravity is, sets matter into motion toward a direction. In
fact,
in some places in the galaxy this dark energy (gravity) is very
strong.
"It is a gravitational field of a galaxy." The spiral galaxy is not
strongly
bound gravitationally between stars, but each star is falling toward
the
other, and collectively they fall toward each other around a circle,
and
what's more, the galaxy is swirling like a hurricane and not clearly
orbiting. Swirling as Suns in spiral arms are loosely bound
gravitationally
to each other. There is a much larger movement.

Also in the long term, a spiral galaxy condenses from a simple force
as it rotates: gravity. This makes the spiral galaxy rotate faster
over
time and gain directional speed. Like trains on tracks, galaxies
everywhere accelerate on their tracks and occasional collisions
leave scattered elliptic galaxies behind.

Dark matter is merely winds of gravity, winds that effect the
direction
of freefall of stars. These winds are tied to a two-dimensional plain
of the galaxy. Hard to concieve with our little heads.

Oops, first three sentences: Gravity. Why can't people get it.
Gravity builds... I forgot.

A word ended up missing in the sentence and I don't remember.
Gravity builds something that is tied to a spiral galaxy...

Gravity builds up in a spiral galaxy. One takes a large volume
of mass and rotates it and the whole thing becomes gravitational
curving the path of freefalling objects toward the rotation of the
galaxy. Yes. In some places weak, in some places strong,
accelerated fields of gravitational movement, as gravity,
sets matter into motion toward the orbital. And yet no science,
no agreement.



.

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