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Old March 12th 11, 09:19 AM posted to sci.astro
Henry Wilson DSc
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Posts: 264
Default Most 'Variable Stars' are not Varying at all..

On Fri, 11 Mar 2011 15:08:00 -0800 (PST), Brad Guth wrote:

On Mar 10, 1:35*pm, Hw@..(Henry Wilson DSc) wrote:
They are ordinary stars that have a large orbiting planet.
Their light moves at c+vsin(t/T) towards Earth, causing the photon stream to
spatially bunch up and separate as it travels. This gives the impression of a
periodic brightness variation when it reaches an Earth observer.

For a complete discription of the process see:

http://www.scisite.info/The_new_ball..._of_light.html


Exactly correct, whereas a binary star such as having a brown dwarf or
a very large 16x Mj planet should make a good starshade as it orbits
through our line of sight. Basically most stars have planets, at
least to start with.



and the planets cause the stars to wobble around a barycentre in a fairly small
orbit.
That is enough to cause photon bunching as their emitted light travels across
space.

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