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A few more...Distorted galaxies:
The Pinwheel Galaxy : M101
Description & Picture : antwrp.gsfc.nasa.gov...
"Recent evidence indicates that a close gravitational interaction with a neighboring galaxy created waves of high mass and condensed gas which continue to orbit the galaxy center. These waves compress existing gas and cause star formation."
"A fried Egg" : NGC 7742 : A Ring Galaxy
external image
Description & Source: antwrp.gsfc.nasa.gov...
"NGC 7742 is known to be a Seyfert galaxy - a type of active spiral galaxy with a center or nucleus which is very bright at visible wavelengths."
Swirls in a cup of coffee : NGC 4622
external image
Description & Source: antwrp.gsfc.nasa.gov...
"But a closer look at this galaxy reveals that a pronounced inner spiral arm winds in the opposite direction. So which way is this galaxy rotating? Recent evidence combining ground-based spectroscopy and the sharp Hubble image data surprisingly indicates that the galaxy is likely rotating clockwise in the picture, its outer spiral arms opening outward in the direction of rotation. There are further indications that a past collision with a smaller companion galaxy has contributed to this bizarre rotational arrangement of spiral arms, essentially unique among known large spiral galaxies, in NGC 4622."
An Unsual Spiral Galaxy : M66
Description & Picture: antwrp.gsfc.nasa.gov...
"Why isn't spiral galaxy M66 symmetric? Usually density waves of gas, dust, and newly formed stars circle a spiral galaxy's center and create a nearly symmetric galaxy. The differences between M66's spiral arms and the apparent displacement of its nucleus are all likely caused by the tidal gravitational pull of nearby galaxy neighbor M65."
:)
[edit on 8/7/2004 by jp1111]
[edit on 8/7/2004 by jp1111]
From Thread: A Look at Space: Part 2: Galaxies
Posted by jp1111, on August 7, 2004 at 16:53 GMTA few more...Distorted galaxies:
The Pinwheel Galaxy : M101
Description & Picture : antwrp.gsfc.nasa.gov...
"Recent evidence indicates that a close gravitational interaction with a neighboring galaxy created waves of high mass and condensed gas which continue to orbit the galaxy center. These waves compress existing gas and cause star formation."
"A fried Egg" : NGC 7742 : A Ring Galaxy
external image
Description & Source: antwrp.gsfc.nasa.gov...
"NGC 7742 is known to be a Seyfert galaxy - a type of active spiral galaxy with a center or nucleus which is very bright at visible wavelengths."
Swirls in a cup of coffee : NGC 4622
external image
Description & Source: antwrp.gsfc.nasa.gov...
"But a closer look at this galaxy reveals that a pronounced inner spiral arm winds in the opposite direction. So which way is this galaxy rotating? Recent evidence combining ground-based spectroscopy and the sharp Hubble image data surprisingly indicates that the galaxy is likely rotating clockwise in the picture, its outer spiral arms opening outward in the direction of rotation. There are further indications that a past collision with a smaller companion galaxy has contributed to this bizarre rotational arrangement of spiral arms, essentially unique among known large spiral galaxies, in NGC 4622."
An Unsual Spiral Galaxy : M66
Description & Picture: antwrp.gsfc.nasa.gov...
"Why isn't spiral galaxy M66 symmetric? Usually density waves of gas, dust, and newly formed stars circle a spiral galaxy's center and create a nearly symmetric galaxy. The differences between M66's spiral arms and the apparent displacement of its nucleus are all likely caused by the tidal gravitational pull of nearby galaxy neighbor M65."
:)
[edit on 8/7/2004 by jp1111]
[edit on 8/7/2004 by jp1111]
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