Thank you.
So would you find the orbital radius of a Jovian moon by using a telescope to view Jupiter at opposition during a time when the moon is farthest from Jupiter? Then you could find the arcseconds of angle from the center of Jupiter to the center of the moon? Then you could use the...
How did the first scientists figure out the orbital radius of a moon of Jupiter? How can observations lead to a calculation of the orbital radius of a moon of another planet?
Thank you for writing. I am working on understanding the acceleration in polar form. I see that der = dθeθ. 1. Am I correct in saying that means that a small change in the unit vector in the r direction is equal to a small change in the angle in the theta direction? I see that deθ = −dθer...
Thank you. I have looked at that site before.
Can you explain why this is true der = dθeθ, and that deθ = −dθer (from the top of page 2)? I can't really see that from the diagram.
When proving that Newton's Universal Law of Gravity will produce an elliptical orbit, the radial acceleration is confusing to me. Can someone please explain how the radial acceleration is equal to d^2/dt^2 - r(d x theta / dt)^2. Could someone please detail how that acceleration is derived...