Starship Asterisk*

michaelwaltrip2 wrote: About the Galaxy Collision, I saw a recent show about super-massive black holes being the center of all galaxies. I wonder about what happens to the super massive black holes in such a collision? What would happen if the centers would actually collide?

Jonathan O'Callaghan wrote:
Scientists believe that the interaction of two black holes could have one of two outcomes. The first is that they merge together to form one, much more massive black hole. The second is that due to spin, the two black holes could interact and recoil from each other sending one hurtling away.

We do now have evidence that the second option has happened. We believe that at the centre of large galaxies there resides a supermassive black hole containing hundreds of millions of times the mass of our Sun. These supermassive black holes are thought to be spinning at phenomenal rates, and so as two galaxies collide, their black holes will eventually interact. And scientists at the Max Planck Institute for extraterrestrial Physics have observed a black hole being ‘kicked out’ of its parent galaxy through interacting with a bigger black hole. We can effectively think of it as two spinning tops. Depending on the rate of their spin, their size and the angle at which they collide, they could come together, or one can get spun out of the way of the other. While both options are possible, we thus far only have evidence of the second, more extreme of these options.

- See more at: http://www.spaceanswers.com/deep-space/ ... ASS1W.dpuf

DanS1 wrote:Is there any possibility that the two galaxies are different distances from this view point? That is, 2207 could be closer and they just appear to be merging? If you look closely at 2207's lighter arms on the right side, it doesn't look as if it's distorted or effected by the merge. Just a thought.

Shayna wrote:I wonder why the galaxies will collide and the stars don't. Aren't the stars part of the galaxy?

michaelwaltrip wrote:
Do all super massive black holes spin? (Do all black holes spin? or is this theory).

michaelwaltrip wrote:
I am trying to imagine the energy of the momentum or such a thing.

michaelwaltrip wrote:
This must (my speculation) a contributing factor to the "black" gravity of it all.

http://en.wikipedia.org/wiki/Dark_matter#History_of_the_search_for_its_composition wrote:
<<Early theories of dark matter concentrated on hidden heavy normal objects, such as black holes, neutron stars, faint old white dwarfs, brown dwarfs, as the possible candidates for dark matter, collectively known as massive compact halo objects or MACHOs. Astronomical surveys for gravitational microlensing, including the MACHO, EROS and OGLE projects, along with Hubble telescope searches for ultra-faint stars, have not found enough of these hidden MACHOs.>>

michaelwaltrip wrote:
Are black holes every destroyed? Do they have a life cycle?

DanS1 wrote:Is there any possibility that the two galaxies are different distances from this view point? That is, 2207 could be closer and they just appear to be merging? If you look closely at 2207's lighter arms on the right side, it doesn't look as if it's distorted or effected by the merge. Just a thought.

The two spiral galaxies (in figure 1) IC 2163 (on the right) and NGC 2207 (on the left), have narrowly missed a collision in the constellation Canis Major, where they are located about 6 degrees southwest of the Dog Star, Sirius. Imaged by the Wide Field and Planetary Camera 2 on NASA's Hubble Space Telescope, these beautiful hurricane worlds can now be more closely examined to survey the damage.
IC 2163 has an unusual eye-shaped structure formed by fast-moving gas and star streams in the eyelids and a bright galactic nucleus in the pupil. The bright oval streams extend on either side to form long tidal arms that fling out stars and gas for 100 thousand light years. The tidal arm on the left is partially hidden by the foreground dust in NGC 2207. Computer simulations indicate that ovals like this are very short-lived features that appear when a companion galaxy orbits in the direction of rotation. This proved to be a valuable clue for reconstructing the past history of this pair.

Seven astronomers led by the husband and wife team of Bruce and Debra Elmegreen have been observing these galaxies and others like it for the last ten years. Neutral hydrogen velocities that were obtained by Elias Brinks, Michele Kaufman and Debra Elmegreen with the Very Large Array Radio Telescope in New Mexico were meticulously compared to computer models of the orbits, structures, and motions, made by Maria Sundin, Magnus Thomasson, and Bruce Elmegreen. By matching the models with the observations, they could determine that IC 2163 orbited around NGC 2207 from the left to the right, going behind NGC 2207 200 million years ago and making its closest approach 40 million years ago. The main response in IC 2163 to the tidal forces was the eye-shaped oval and tidal tails, while the disk of NGC 2207 developed a large warp.

HellCat wrote:Good pic - always a fan.

There's a chance to make this sentence in the description a bit clearer.

"In the most recent encounter that about peaked 40 million years ago, the smaller galaxy is swinging around counter-clockwise, and is now slightly behind the larger galaxy."

I suggest moving it to the end of the paragraph, and splitting it into two sentences because it's stating two separate points.

Keep up the great work!

neufer wrote:Almost all things spin.

(However, the Higgs boson, mesons, helium-4, and Carbon-12 all have zero spin.)

geckzilla wrote:

Shayna wrote:I wonder why the galaxies will collide and the stars don't. Aren't the stars part of the galaxy?

Galaxies look solid and stars seem huge but in reality stars are very tiny compared to the space between them so the stars just pass by one another. It's really hard to make them collide. It's something like throwing a cloud of marbles at another cloud of marbles but all the marbles are kilometers apart from one another. Anyway, it's easy to look at a distant galaxy and not realize just how far apart everything within it really is.

ta152h0 wrote:
it appears the arms are moving in the same direction like two spur gears meshing in space

• Well... this is another fine mesh you've gotten us into

http://en.wikipedia.org/wiki/Clockwork_universe wrote:

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<<In the history of science, the clockwork universe compares the universe to a mechanical clock. It continues ticking along, as a perfect machine, with its gears governed by the laws of physics, making every aspect of the machine predictable.

This idea was very popular among deists during the Enlightenment, when Isaac Newton derived his laws of motion, and showed that alongside the law of universal gravitation, they could explain the behaviour of both terrestrial objects and the solar system.

A similar concept goes back, to John of Sacrobosco's early 13th-century introduction to astronomy: On the Sphere of the World. In this widely popular medieval text, Sacrobosco spoke of the universe as the machina mundi, the machine of the world, suggesting that the reported eclipse of the Sun at the crucifixion of Jesus was a disturbance of the order of that machine.

Responding to Gottfried Leibniz, a prominent supporter of the theory, in the Leibniz–Clarke correspondence, Samuel Clarke wrote: "The Notion of the World's being a great Machine, going on without the Interposition of God, as a Clock continues to go without the Assistance of a Clockmaker; is the Notion of Materialism and Fate, and tends, (under pretence of making God a Supra-mundane Intelligence,) to exclude Providence and God's Government in reality out of the World."

In 2009 artist Tim Wetherell created a large wall piece for Questacon (The National Science and Technology centre in Canberra, Australia) representing the concept of the clockwork universe. This steel artwork contains moving gears, a working clock, and a movie of the lunar terminator.

michaelwaltrip wrote:Do all super massive black holes spin? (Do all black holes spin? or is this theory). I am trying to imagine the energy of the momentum or such a thing. This must (my speculation) a contributing factor to the "black" gravity of it all.

michaelwaltrip wrote:Are black holes every destroyed? Do they have a life cycle? I'm sorry, perhaps these are better questions for another place. I remember reading about Einstein being fascinated with the idea of black hole collision. Thanks.

Boomer12k wrote:Awesome detail...very clear picture...

Two throwing stars colliding...

If two galaxies collide, and no one takes a picture.....

One observation...to me, it appears where the collision takes place, 2207's arms are pushed up and away from IC2163...some stars from 2207 trail through and behind IC2163...but the DUST TRAILS seem not to be disturbed...are they more massive??? The stars in the second arm from the right, appear to be pushed back, like a wave hitting a shore rock at the beach. I would think, they would "fall" towards IC2163...the first arm from the right, appears broken up...the second seems pushed away....Dark Matter? Dark Energy? A same charge Field of some type???
As I continue to look at this...I am thinking IC2163 is CHOPPING DOWN into 2207...and that area in collision is being splayed out as the mass of IC2163 slices into it, and it "peels" it back somewhat....as the mass of IC2163's stars PASS 2207's stars, they warp spacetime from their momentum, and it disrupts the area...and as they mix, they influence each others paths as they pass, and so the distinction of "ARMS" is dissolved,....kind of like two weather fronts, and how they influence each other....hmmmmm.....

JohnD wrote:We havea personal interest in this. Andromeda and the Milky Way will collide ina few mega-millenia. There are several videos online that purport to show wht will happen. This one happens to be especially smooth and '3D'.

John

Ann wrote:That's a fine video, JohnD. It does show - or seems to show - that the galaxy that remains after the merger will be somewhat less massive than the two individual galaxies that merged, since some of their material will be flung into space and lost to both of them.