Starship Asterisk*

Psnarf wrote:Thank you for the additional information, of which I was unaware, Ensign NGC3314. Just trying to help keep Dr. Nemiroff within the bounds of scientific certainty. The Sloan Survey site also avoids the deduction that the null hypothesis is false.
"These new discoveries add weight to a picture in which galaxies like the Milky Way are built up from the merging and accretion of smaller galaxies." -From the "Field of Streams" site. Yes, the evidence appears to be growing that the proposition which implies that there is no relationship between the existence of measurable trails and galactic accretion is false, yet there may yet be other explanations for the data. If the jury is still out, we cannot proclaim that galactic accretion is the only explanation for what the data implies.

Ann wrote:

Chris Peterson wrote:

Anthony Barreiro wrote:The light from a galaxy that is moving toward us will be shifted toward the blue end of the spectrum.

That's true, but outside the Local Group, I don't think there are any galaxies that are moving towards us. All other galaxies are redshifted.

That's not quite true, Chris. There are a few Virgo galaxies which are moving towards us because their internal movement in our directions inside the cluster is greater than the cluster's overall motion away from us. I believe that M90 is an example of such a blue-shifted Virgo galaxy.

Ann

Psnarf wrote:The Explanation contains "...Milky Way Galaxy has absorbed several smaller galaxies..." however, the referenced http://apod.nasa.gov/apod/ap080619.html states that the evidence "supports the cosmological scenario...." It is not necessarily a fact that our galaxy has absorbed several smaller galaxies, just that observations of other galaxies support that scenario. It is highly probable, the possibility exist, but we have yet to find any evidence to support that statement with regard to the Milky Way.
There is a subtle difference between a statement of fact and scientific observations that support a scenario.

ta152h0 wrote:
there is no mathematics in economics, you can see that bs mountain from space it is so big.

tannaberton wrote:But if everything is flying apart how can they collide?

Chris Peterson wrote:

Guest wrote:
If we folks are this clever, how is it we can do this for galaxies but not our planet's economy ?

Because the mathematics behind galaxy collisions is much, much simpler than that behind even local economics, let alone the world economy.

http://danbunting.wordpress.com/2012/04/02/sentencing-lies-damned-lies-and-laffer-curves/ wrote:
Sentencing, Lies, Damned Lies and Laffer Curves
by Dan BUnting, April 2, 2012

<<The basic idea of the Laffer Curve is that there is a nice smooth curve of tax rate and revenue return. At the extremes this makes sense. If you are taxed at 1% then increasing it to 2% isn’t going to make any difference to the amount people work, so the tax take by the government goes up. Clearly, if you tax at 100% and then reduce it, the amount of tax the government gets goes up.

So far, so good. The problem is that then people move to say that there is an ‘optimum tax rate’ ie, that there is level of tax where reducing the tax rate can counter-intuitively increases the tax take. So does it work in real life?

[b][size=150][color=#0000FF]Neo-Laffer Curve[/color][/size][/b]

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Basically, no. It is rubbish. Martin Gardener did an excellent demolition job on it shortly after it was first thought up, coming up with his ‘Neo-Laffer Curve’. The assumption, that the curve is smooth with one only one peak, is clearly wrong and there are many other factors at play. It also assumes that all people are completely economically rational, and the only thing that they care about is money.

Guest wrote:If we folks are this clever, how is it we can do this for galaxies but not our planet's economy ?

Chris Peterson wrote:

Anthony Barreiro wrote:
The light from a galaxy that is moving toward us will be shifted toward the blue end of the spectrum.

That's true, but outside the Local Group, I don't think there are any galaxies that are moving towards us. All other galaxies are redshifted.

http://en.wikipedia.org/wiki/Messier_86 wrote:

[b][color=#0000FF][size=150]Hubble view of Messier 86[/size][/color][/b]

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<<Messier 86 (distance: 52 Mly) is an elliptical or lenticular galaxy in the constellation Virgo. It was discovered by Charles Messier in 1781. M86 lies in the heart of the Virgo Cluster of galaxies and forms a most conspicuous group with another giant, Lenticular Galaxy M84. It displays the highest blue shift of all Messier objects, as it is approaching the Milky Way at 244 km/s. This is due to its falling towards the center of the Virgo cluster from the opposite side, which causes it to move in the direction of the Milky Way.

Messier 86 is linked by several filaments of ionized gas to the severely disrupted spiral galaxy NGC 4438 and shows some gas and interstellar dust that may have been stripped, as well as the gas on those filaments, of it. It's also suffering ram-pressure stripping as it moves at high speed through Virgo's intracluster medium, losing its interstellar medium as it moves through it leaving behind a very long trail of hot gas.

Messier 86 has a rich system of globular clusters, with a total number of around 3,800. Its halo also has a number of stellar streams interpreted as remmants of dwarf galaxies that have been disrupted and absorbed by this galaxy.>>

Chris Peterson wrote:

Anthony Barreiro wrote:The light from a galaxy that is moving toward us will be shifted toward the blue end of the spectrum.

That's true, but outside the Local Group, I don't think there are any galaxies that are moving towards us. All other galaxies are redshifted.

Chris Peterson wrote:

Anthony Barreiro wrote:The light from a galaxy that is moving toward us will be shifted toward the blue end of the spectrum.

That's true, but outside the Local Group, I don't think there are any galaxies that are moving towards us. All other galaxies are redshifted.

Anthony Barreiro wrote:The light from a galaxy that is moving toward us will be shifted toward the blue end of the spectrum.

tannaberton wrote:But if everything is flying apart how can they collide?