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Old June 6th 06, 01:26 AM posted to alt.astronomy
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Default Andromeda Galaxy or US (What if)


G=EMC^2 Glazier wrote:
To All a question. Does Ardomeda turn when hitting the Milky way turn
in the same direction? That has lots of significants TreBert



"The galaxy is inclined an estimated 77° relative to the Earth (where
an angle of 90° would be viewed directly from the side.) Analysis of
the cross-sectional shape of the galaxy appears to demonstrate a
pronounced, S-shaped warp, rather than just a flat disk.[19] A possible
cause of such a warp could be gravitational interaction with the
satellite galaxies near M31.

Spectroscopic studies have provided detailed measurements of the
rotational velocity of this galaxy at various radii from the core. In
the vicinity of the core, the rotational velocity climbs to a peak of
225 kilometres per second (140 miles/sec.) at a radius of 1,300 light
years, then descends to a minimum at 7,000 light years where the
rotation velocity may be as low as 50 kilometres per second (31
miles/sec.). Thereafter the velocity steadily climbs again out to a
radius of 33,000 light years, where it reaches a peak of 250 kilometres
per second (155 miles/sec.). The velocities slowly decline beyond that
distance, dropping to around 200 kilometres per second (124 miles/hr.)
at 80,000 light years. These velocity measurements infer a concentrated
mass of about 6 × 109 M☉ in the nucleus. The total mass of the
galaxy increases linearly out to 45,000 light years, then more slowly
beyond that radius.[20]"

http://en.wikipedia.org/wiki/Andromeda_Galaxy

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