Speed of Light: A universal Constant?
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From: bz on 13 Jun 2005 20:20 H@..(Henri Wilson) wrote in news:774sa1d1600fo6hfemtmjrh1smfiqqo52s(a)4ax.com: > On Mon, 13 Jun 2005 08:47:29 +0000 (UTC), bz > <bz+sp(a)ch100-5.chem.lsu.edu> wrote: > >>H@..(Henri Wilson) wrote in >>news:jtkpa1hu4tuk4ik1dtp62t42ro69d82jde(a)4ax.com: >> >>> Paul, Earth is about 100 solar diameters from the sun. >>> >>> The sun 'orbits the Earth' in one day. >> >>??? >> >>The earth rotates on its axis in one day. The sun does NOT orbit the >>earth any more than the entire universe orbits the earth every 24 hours. > > Bob, Did you notice the ' ' ? I did, but you were talking about a star orbiting in 5 days, implying that was possible because the sun orbited the earth in 24 hours. > I was merely trying to provide a visual impression of an object orbiting > another once per day. A large object orbiting every five days, eg D Cep, > would move a lot slower than that. Your image failed because to orbit in 24 hours, the sun would have had to be in synchronous orbit altitude at 22,235 miles. Which would kinds scorce my grass. > The sun orbits the Earth/sun barycentre once per year. It also orbits > the Jupiter/sun barycentre once per Jupiter year. > If the sun had a large close companion, the two would orbit the > barycentre at the common period. Provided the orbits were circular or close thereto. -- bz please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. bz+sp(a)ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap
From: bz on 13 Jun 2005 20:39 H@..(Henri Wilson) wrote in news:lr4sa1da45qdlencsf6j9f97tchcr34ksg(a)4ax.com: bz said: >>Right. Every measurement is made WRT some FoR. >> >>SR says that light moves at c wrt all possible observer FoRs. No >>exceptions have ever been found. > > No support has ever been found you mean. > I said what I meant, as you well know, Henri. :) I'll look atcher curves. -- bz please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. bz+sp(a)ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap
From: Henri Wilson on 13 Jun 2005 22:14 On Tue, 14 Jun 2005 00:20:24 +0000 (UTC), bz <bz+sp(a)ch100-5.chem.lsu.edu> wrote: >H@..(Henri Wilson) wrote in >news:774sa1d1600fo6hfemtmjrh1smfiqqo52s(a)4ax.com: > >> On Mon, 13 Jun 2005 08:47:29 +0000 (UTC), bz >> <bz+sp(a)ch100-5.chem.lsu.edu> wrote: >> >>>H@..(Henri Wilson) wrote in >>>news:jtkpa1hu4tuk4ik1dtp62t42ro69d82jde(a)4ax.com: >>> >>>> Paul, Earth is about 100 solar diameters from the sun. >>>> >>>> The sun 'orbits the Earth' in one day. >>> >>>??? >>> >>>The earth rotates on its axis in one day. The sun does NOT orbit the >>>earth any more than the entire universe orbits the earth every 24 hours. >> >> Bob, Did you notice the ' ' ? > >I did, but you were talking about a star orbiting in 5 days, implying that >was possible because the sun orbited the earth in 24 hours. > >> I was merely trying to provide a visual impression of an object orbiting >> another once per day. A large object orbiting every five days, eg D Cep, >> would move a lot slower than that. > >Your image failed because to orbit in 24 hours, the sun would have had to >be in synchronous orbit altitude at 22,235 miles. Which would kinds scorce >my grass. Orbit diameter depends on the mass of the other object. Bob, my only concern was the apparent rate of movement, the angular velocity of something in a 1 day orbit. The sun doesn't appear to move very fast. Use the moon if you want to be happy about it. It move s at about the same angular speed. > >> The sun orbits the Earth/sun barycentre once per year. It also orbits >> the Jupiter/sun barycentre once per Jupiter year. > >> If the sun had a large close companion, the two would orbit the >> barycentre at the common period. > >Provided the orbits were circular or close thereto. No, the period would be the same for both, no matter what the eccentricity.. I want to know more about the orbit shape though. HW. www.users.bigpond.com/hewn/index.htm Sometimes I feel like a complete failure. The most useful thing I have ever done is prove Einstein wrong.
From: Henri Wilson on 13 Jun 2005 22:17 On Tue, 14 Jun 2005 00:39:10 +0000 (UTC), bz <bz+sp(a)ch100-5.chem.lsu.edu> wrote: >H@..(Henri Wilson) wrote in >news:lr4sa1da45qdlencsf6j9f97tchcr34ksg(a)4ax.com: > >bz said: >>>Right. Every measurement is made WRT some FoR. >>> >>>SR says that light moves at c wrt all possible observer FoRs. No >>>exceptions have ever been found. >> >> No support has ever been found you mean. >> > >I said what I meant, as you well know, Henri. :) > >I'll look atcher curves. I think you will change your tune when you see that the BaT provides an exact match for the observed RT Aur 'velocity' and 'brightness' curves. It leaves no doubt that the BaT is correct, at least for light from remote stars. HW. www.users.bigpond.com/hewn/index.htm Sometimes I feel like a complete failure. The most useful thing I have ever done is prove Einstein wrong.
From: bz on 13 Jun 2005 22:08
H@..(Henri Wilson) wrote in news:lr4sa1da45qdlencsf6j9f97tchcr34ksg(a)4ax.com: > Just run my program again and see how it produces the exact > characteristics of RT Aurigae. > > I have set the parameters to the right values. > Set the distance to about 130-140 LYs using 'pause/ restart'. > > Then compare the brightness curves with the reference Andersen provided: > http://mb-soft.com/public2/cepheid.html > > Unless you have your radial velocity (I am guessing that that is the blue curve you have added) upside down, you have a problem. radial velocity from the referenced page has a slow increase and a rapid retreat. You appear to have a rapid increase and a slow retreat. Even if your velocity curve is upside down, there is still a problem. The brightness curve lags behind the minimum of the radial velocity curve in the real data. In your curves, they come at the same time. This could be a crucial difference. I would also like to get the data from your program output into a file so I can compare it using other programs with the table from the Anderson provided reference. If I had your latest code, I can get the data. -- bz please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. bz+sp(a)ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap |