Thread: Adults required
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Old April 21st 10, 05:22 PM posted to sci.astro.amateur
Sam Wormley[_2_]
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Default Adults required

On 4/21/10 10:54 AM, oriel36 wrote:
Something has to give here and what that is I cannot imagine.


http://sh1.webring.com/people/nj/jef...eblindmice.htm

Three blind mice
Three blind mice
Dame Julian
Dame Julian
The Miller and his Merry Old Wife
She scraped her tripe, lick thou the knife

____________________


It was a particular joy to me to apply Kepler's third law to
the observations of the Fomalhaut System and find that the mass
falling out of Kepler's equation agree beautifully with the mass
predicted by the spectra of that star.

Gerald I don't think you have the mathematical background to
understand Kepler's third law in its modern applications, but
do look at:
http://en.wikipedia.org/wiki/Kepler's_laws_of_planetary_motion#Third_law

4π^2a^3 = P^2G(M + m)

Gerald, just because you can't understand the mathematics, does
not make it wrong.

Fomalhaut's mass is about 2 solar masses.
Fomalhaut-b's orbital RADIUS is 115 astronomical units, a = 115 AU.
Fomalhaut-b's orbital PERIOD is 872 years, T = 872 years.

And using Kepler's third law, we get,

P^2 = (2π)^2 a^3 / G M

(872 yr)^2 = (2π)^2 (115 AU )^3 / G (3.978 × 10^30 kg)

Kepler's third law works beautifully for the Fomalhaut system! The
observations agree beautifully with Kepler's law of Harmony!