Sorcerer wrote:

"Richard Saam" wrote in message
...
| The NEWSGROUP POST sci.astro
| "HUBBLE REVEALS TWO DUST DISKS AROUND NEARBY STAR (STScI-PR06-25)"
|
| prompted a look at this site:
|
| http://www.solstation.com/stars2/beta-pic.htm
|
| and thought it appropriate to the discussion.
|
| It identifies a star 'Beta Pictoris'
| 'only 20 to 200 million years old at most'
| with two dust discs as observed by the Hubble telescope.
|
| *******************
| Beta Pictoris is a bluish white main sequence dwarf star of spectral and
| luminosity type A5 V, but has been previously classified as A3. It is also
| classified as a "shell star" because it is surrounded by a shell of mostly
| hydrogen gas. The star may have about 1.75 times Sol's mass, 1.4 times its
| diameter, and 8.7 times its luminosity. The star may be as enriched than
Sol
| with elements heavier than hydrogen ("metallicity"), based on its
abundance of
| iron (Heap et al, 1995). It appears to be only 20 to 200 million years old
at most.
| *******************
|
| Much older stars such as our own do not have this dust disc character.
|
| Could it be that the dust particles
| (with their large area to mass ratios as compared to planetary objects)
| experience the anomalous deceleration in a more pronounced manner than
| the Pioneer spacecraft and consequently spin into the star or orbiting
planets.
| Our solar system is essentially dust free.
| Perhaps, it did not have to be that way
| but for the anomalous deceleration effect.
|
| No doppler effects are noted from the spinning 'Beta Pictoris' dust disc.

I wonder why?
ROFLMAO!

One would need a time (or frequency) standard
related to a particular atomic quantum transition in 'Beta Pictoris' dust disc
compared to a duplicate atomic quantum transition here on earth.

Is there anything in reflected light to do this?

Richard