Video

Most valuable channel I have ever found on CZcams ❤

looking forward to this playlist

You saved me.. thanks a lot mr.Wladmir.

Vaaaaleu, prof!!!!!!!!!!!

Thanks for this video and the animation , gives you a much better mental picture of what is happening

This is exactly what I was looking for. Do you provide the hard copy for download of ASTR 506 - Class 19 - Extra videos 1 - 4? If not I'll have to type it all in myself because it is such a great reference.

thanks for the lecture, much love from Brazil

Why I did'nt find your channel before:)

Thank you Very much :D great video :)

6:09 it'd be sin(90-alpha) instead of sin(90+alpha)

You are doing great...I am shocked why there are no comments on this vid...keep going man....Love from india

i owe you a lot Wladimir Lyra thanks for the video

Best video I found one CZcams to clear my concept

Why does it not hurt to look at all the further away stars then?

Why am I only now finding this playlist?! This is so helpful!

Good day sir, thank you for the informative and lucid video. If you don't mind answering a basic question, how is cos(phi) derived?

Most underrated channel out there

is there a link for the notes you wrote?

Therefore this also means that all the parallels except the Equator are never the shortest distances.. So for example you could walk parallel to meridians going from north to south but you could never walk parallel to parallels to be the fastest to go east to west (or vice versa), that's interesting

You have latitude and longitude reversed.

Thanks a lot, sir🥰

The value of k

do you by any chance keep your handwritten lectures somewhere?

why didn't you divide by cos(theta)?

Density is the difficult one :D

can you explain the integration of [exp(-P^2/(2mkt) * P^2 dP] in details Pleas

Please explain the process of differentiation in detail

Helpful. Text is a bit small to read.

Dear sir, I am doing my thesis but I could not understand transformation between the astronomical coordinate systems, so request you sir plz suggest me the name of best book of astronomical coordinate system transformations.🙏🙏

it is very useful for me ,thanks for this knowledge

at 5:29 shouldn't be "crosses the meridian" instead of "horizon" ? (great videos btw, well explained, very clear and precise, excellent pictures and animations )

There is an error in dy/d(phi) derivative in Jacobi Matrix. sin(phi) derivative would be cos(phi) not -cos(phi)

What 😳 is that about i don't have a clue 🤔

Very interesting your demonstration. Eratóstenes (BC) already knew this, but in impiricall way.

Can we get the program that can solve a system of n first-order differential equations by the Heun method ( Modified Euler) by FORTRAN

Thanksss for the video

Thanks for sharing this with us

That's a terrific animation for explaining the ecliptic.

Thank you very much. A PhD student in astrophysics

Any chance we could get a text file with the code?

Sir plzzzzz

Sir I am from India

Sir I love your videos

Thank you so much!

spherical astronomy is the hardest astronomy.

Salve Brasil! Muito obrigado pela aula!

It would be better if you make the 2nd diagram bigger ie. the page should be large

GREAT 👍

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Nice presentation and lecture. Please can you email me the Mathematica code or Matlab code I can use to plot these Zero Velocity curves?