Starship Asterisk*

On my way home last night I was wondering about elliptical galaxies and the phenom. called "Gravitational Lensing". Of all the examples I have seen to date, they seem to appear around groups of Elliptical galaxies. I haven't seen any around tight groups of spiral galaxies. If this is the case, then perhaps the overall gravitational effect of Ellipticals is increased by factors as compared to spirals??

Hello all


In cosmology,,,,,,,,,,,,,,,there are so many maybes.


Owing to the structure of the spiral still intact,,,,,,,,,,,,and breaking down,,,,,,,,,,,I would tend to think it is a progressive change from a spiral to an elliptical.

Maybe the eliptical had a close encounter with a spiral and stripped off some of the dust lane from the spiral. :wink:
Orin

I would ask, Is it part of the Elliptical galaxy or perhaps part of a companion spiral that is between us and the Elliptical galaxy?

Actually, options are countless. I believe we are looking at the dandruff of gods. It hangs there for eternity since gods shaked it off their heads.

Hello All

Hello Orin

I like the link. http://antwrp.gsfc.nasa.gov/apod/ap060704.html

but I disagree with the logic behind it.
[quote]Explanation: Why is peculiar galaxy Centaurus A so dusty? Dramatic dust lanes that run across the galaxy's center mark Cen A. These dust lanes are so thick they almost completely obscure the galaxy's center in visible light. This is particularly unusual as Cen A's red stars and round shape are characteristic of a giant elliptical galaxy, a galaxy type usually low in dark dust. Cen A, also known as NGC 5128, is also unusual compared to an average elliptical galaxy because it contains a higher proportion of young blue stars and is a very strong source of radio emission. Evidence indicates that Cen A is likely the result of the collision of two normal galaxies. During the collision, many young stars were formed, but details of the creation of Cen A's unusual dust belts are still being researched. Cen A lies only 13 million light years away, making it the closest active galaxy. Cen A, pictured above, spans 60,000 light years and can be seen with binoculars toward the constellation of Centaurus.[/quote]


I would give a second opinion.

There existed a very large spiral galaxy that went through space accumulating matter either by collision with another one or more galaxies until the centre black hole become a super black hole and eventually activating itself similar to m87 creating a jet stream so massive that it restructured the galaxy to the form of elliptical. Slowy the sprial arms were broken down either fed into the black hole or by the jet stream.

This maybe a wild idea, what do others think.

Thanks David Leeds! Here is the July 4th APOD in case anyone else missed it as I have.
http://antwrp.gsfc.nasa.gov/apod/ap060704.html
Orin

Hi orin stepanek.

The APOD of July 4th (Elliptical Galaxy Centaurus A from CFHT) was originally dated July 3rd (it still was even when I sent in my earlier post) but I notice it has now been corrected to July 4th.

Time catches up with us all, eventually! :)

I get this for July 3.
http://antwrp.gsfc.nasa.gov/apod/ap060703.html
what is the other?
Orin

I got well confused by the July 3rd date on what I felt sure should have been July 4th. I like BMAONE23's suggestions. They are much better (and funnier) than what I thought, which was that it was due to a United States Time Zone that I was not aware of. I never could fathom US Time Zones! :)

Hello All

Where are the two 3rd July 06?

as for the bubble universe that is only a pipe dream.

You are plainly seeing the same image either through gravitational lensing or by looking in both directions around the bubble universe. :D

Okay, how did we get two July 3 2006's? This must be an astronomical mystery or aberation!