RE: No dark matter?
April 26, 2011 at 7:04 am
(This post was last modified: April 28, 2011 at 12:10 am by Wormhole199.)
(April 20, 2011 at 8:47 am)lilphil1989 Wrote:(April 20, 2011 at 7:43 am)alemcodon Wrote: Quraan also tells us the angels travel in 1 earth day the same distance as the moon in 10,000 years, if you derive a speed from there the answer is 299,999.457m/s. So if the book written 1400 yrs ago tells me that, then when it says angels regulate the stars, i believe it.
Nice try, but false.
Firstly, one of the observable quantities you need to make that calculation is the average orbital radius of the moon. Since your value is given to 9 significant figures, it must follow that you know the average lunar orbital radius to the same number of significant figures. And we simply don't know it to that degree of precision.
Secondly, let's actually do the calculation.
Taking the average lunar orbital radius as 0.38 megametres and the orbital period as 27.3 days, all you need to do is find the circumference of the moons orbit, 2*pi*r, multiply by 10000years(converted to days)/27.3days to get the number of orbits in 10000 years and divide that by the number of seconds in a day.
What you get is 3.3*10^9, which is 10 times too large. For a more accurate calculation you would also need to account for the motion of the earth around the sun, and the motion of the sun around the galactic centre, which would only increase the distance travelled by the moon, thus increasing your calculated speed.
It is 10 times too large because alemcodon copied it wrong. It is 1000 not 10,000.
(April 20, 2011 at 1:47 pm)lilphil1989 Wrote:(April 20, 2011 at 12:00 pm)alemcodon Wrote: The speed of light is something I NEVER heard any imam mention.
http://www.speed-light.info/angels_speed_of_light.htm
There is a link to the proper calculation, it has to be calculated outside of gravitational forces.
How can you calculate how far the moon will move without gravity?
Gravity is what makes it move...
It is about the effect of gravity on frames of reference. 299792.458 km/sec is the measured speed of light in local inertial frames. So if you want to make a comparison with "299792.458 km/sec" then you have to make it in a "local inertial frame". You never even defined your frame of reference.
You can challenge the physics here: http://www.speed-light.info/speed_of_light_12000.htm
My favorite site: Speed of Light.