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How is it that spiral galaxies don't spiral?

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JohnD70X7

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If he Milky Way galaxy even is a spiral galaxy, how is it that our solar system does not spiral down to the center or spiral out from the center (depending if the alleged spiral galaxy is spiraling down or out)? There is either a black hole at the center or a white hole.

1767830839625.png


And we cannot detect which it is. Or even if we are in a spiral galaxy. We are in the midst of the woods trying to speculate what shape the forest is.
 
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JohnD70X7

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Old agers postulate that our solar system skips from spiral arm to spiral arm of the galaxy orbiting the galactic center over millions and millions of years. What if we actually ride the galactic arm into the black hole jaws of doom in far less time? Or fling out from the galaxy on that same arm if the spiral effect is ejecting rather than attracting?
 
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Maria Billingsley

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If he Milky Way galaxy even is a spiral galaxy, how is it that our solar system does not spiral down to the center or spiral out from the center (depending if the alleged spiral galaxy is spiraling down or out)? There is either a black hole at the center or a white hole.

View attachment 375090

And we cannot detect which it is. Or even if we are in a spiral galaxy. We are in the midst of the woods trying to speculate what shape the forest is.
Looks like it's spiraling.
 
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Takando

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You asked that how our solar system does not spiral? Well it is spiraling exactly same way as the galaxy does. The reason we don't fall to sun is because we are moving in 3 dimensional space forward and sliding sideways in balanced speed that keeps us in stable distance away from sun. And our sun is moving also, quite fast actually, and that's why we do not fall to the black hole in the centre. Why we cannot see it? Because its in a middle of obstructing cloud. Why we know it's there? You don't need to see it if you can feel it.
 
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JohnD70X7

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You asked that how our solar system does not spiral? Well it is spiraling exactly same way as the galaxy does. The reason we don't fall to sun is because we are moving in 3 dimensional space forward and sliding sideways in balanced speed that keeps us in stable distance away from sun. And our sun is moving also, quite fast actually, and that's why we do not fall to the black hole in the centre. Why we cannot see it? Because its in a middle of obstructing cloud. Why we know it's there? You don't need to see it if you can feel it.
Not what I said.
The solar system spirals down on the galactic arm spiral or spirals out depending on the nature of the galactic spiral (in or out).
 
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Hans Blaster

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Looks like it's spiraling.
It's a very fake image. Stars make elliptical orbits around the central BH. It's no different that the Earth orbiting the Sun. In this case the Sun moves at about 220 km/s.
 
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JohnD70X7

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It's a very fake image. Stars make elliptical orbits around the central BH. It's no different that the Earth orbiting the Sun. In this case the Sun moves at about 220 km/s.
So spiral galaxies are not spirals at all?
Talk about blind faith in what you believe...
 
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Takando

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It looks spiral due the orbit speed and distance. Exactly like in solar system. Also mathematically speaking the orbit is not perfect circle but ellipse in 2d model. Or something that looks like corkscrew if you put it to galaxy scale.

So if you call that corkscrew movement as spiralling it both is and isn't correct, depending on where its related to.
 
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Hans Blaster

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So spiral galaxies are not spirals at all?
Talk about blind faith in what you believe...

The stars do not move in a spiral. They orbit the center like regular objects.
 
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David Lamb

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If he Milky Way galaxy even is a spiral galaxy, how is it that our solar system does not spiral down to the center or spiral out from the center (depending if the alleged spiral galaxy is spiraling down or out)? There is either a black hole at the center or a white hole.

View attachment 375090

And we cannot detect which it is. Or even if we are in a spiral galaxy. We are in the midst of the woods trying to speculate what shape the forest is.
But the solar system is not a galaxy, so why should it spiral?
 
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Larniavc

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If he Milky Way galaxy even is a spiral galaxy, how is it that our solar system does not spiral down to the center or spiral out from the center (depending if the alleged spiral galaxy is spiraling down or out)? There is either a black hole at the center or a white hole.

View attachment 375090

And we cannot detect which it is. Or even if we are in a spiral galaxy. We are in the midst of the woods trying to speculate what shape the forest is.
Gravity.
 
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Larniavc

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Old agers postulate that our solar system skips from spiral arm to spiral arm of the galaxy orbiting the galactic center over millions and millions of years. What if we actually ride the galactic arm into the black hole jaws of doom in far less time? Or fling out from the galaxy on that same arm if the spiral effect is ejecting rather than attracting?
No they don’t.
 
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Ophiolite

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No they don’t.
If the "No" related to @JohnD70X7's assertion that "our solar system skips from spiral arm to spiral arm of the galaxy orbiting the galactic center over millions and millions of years." then you are mistaken. The spiral arms are density waves rotating at a different rate to the individual stars. They are regions of intense star formation associated with the collapse of GMCs (Giant Molecular Clouds). Certainly the solar system doesn't "skip" from spiral arm to spiral arm, but it certainly moves independently of them.
 
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Tuur

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It's a very fake image. Stars make elliptical orbits around the central BH. It's no different that the Earth orbiting the Sun. In this case the Sun moves at about 220 km/s.
Corrections welcome in advance:

If something orbits. it's likely elliptical or close to it (does anything orbit with an eccentricity of 0? ). But then we get to spirals, but maybe in a different way than some might think. It's not a star spiraling inward or outward. but...and here I don't really understand... its an interstellar traffic jam. They're areas of higher density. Here is where the traffic jam idea might be giving me the wrong idea, but orbits can change some due to gravity from other objects, so maybe it's not all that wrong. Here's our solar system trucking along, then it comes to a sort of congested area and, well, things slow a little due to gravitational interaction of other objects in the jam, then the solar system clears, but eventually winds up in another. Just space is so empty that it's nowhere "bumper to bumper" so to speak and things don't slow very much. The spirals then are real, just that it's not everything going down a galactic drain.
 
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linux.poet

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MOD HAT ON

This thread has been moved from The Kitchen Sink to Physical and Life Sciences.

MOD HAT OFF

 
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Shemjaza

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It's a spiral shape, that doesn't mean all the stars that make up the spiral arms are spiraling down to Sagittarius A*, the supermassive black hole at the heart of the galaxy.

Here's an example:
spiral.jpg

This is clearly a spiral shape, but the material that makes up the thingie isn't spiraling down to the center.
 
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JohnD70X7

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But the solar system is not a galaxy, so why should it spiral?
It can ride the galactic spiral. That which rides a spiral is said to spiral down (or up if it is an out thrusting spiral).
 
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