Astrodynamics Lecture25 2017 (Perturbations cont.)

[francesca]

for the other students, in min 28.39 it should be x/r^2 instead of x/r, in other words, there is in total r^7 in the denominator in the second term, which is then correctly accounted for in the next passage and in the final result. Again, very clear what the teacher meant, I share this just because I notice it and it would maybe help someone else looking at this lecture.

[francesca]

min 23 it is written d/dt instead of d/dx (for the formula of the tanx=1/(1+x^2) ) it is clear that is that that the lecturer meant, just to clarify for other students watching the video.

[francesca]

yes, in the book it is -3/2 instead of -3 for the constant of dPhi/dphi (even in the 4th edition)

[francesca]

Is phi defined from 0 to 180 right? There was one sentence that made me wonder if it is not defined from 0 to 90, when you said at min 17.25, that is: as you go to -35 to see less mass by approaching the poles. Thanks in advance.