Module 1.5 (Solar day, month & year, Cardinal points, Seasons)

[@shardula-ai4ourkids169]

Thank-you Nilesh ji, Your each module is short and precise and gives enough time to ponder over and take a re-look.

[@unicvidhya]

Namaste Nilesh ji @nileshoak. My humble pranams for taking time to educate us in simple terms about Indian Calendar. I have a small doubt, Could you please let us know how Indian Calendar system finds (predicts) out sunrise and sunset for an upcoming year?

[@NileshOak]

Modern astronomy has accumulated data over the last 40+ years which in turn have improved the accuracy and precision of algorithm s/polynomials. They are employed by Panchang Makers I know along with traditional knowledge and rules to predict sunrise and sunset

[@umeshmishra9634]

Very good work Nilesh Ji. I couldn’t find good reason of why prime meridian was changed from ujjain to Greenwich? Can you please explain. Thanks

[@NileshOak]

Park the subject matter. Not part of the scope of this course.

[@sujalgurjar3401]

Nilesh sir you are doing great job Please keep it on

[@riospeaks859]

Nilesh ji Pranam! Can you slightly increase teaching speed, it is slower side in this video even at 2x speed. And sorry, if I said otherwise.

[@NileshOak]

Thank you for the feedback. The slow or extra slow speed is based on feedback, too. :)

[@raconteurhermit1533]

use the youtube settings to increase the playback speed

[@rubabu]

looks like video suddenly ends at 15.53m

[@aryanbhai2477]

Nilesh ji you need to get help from one of your students good in graphics, to make this more interesting, visually...imagine how many people we can reach with visual impact otherwise it becomes a little boring...🙏

[@NileshOak]

Understood. Thanks Availability of others who can do what you are asking without having to take significant time from me is the challenge!

[@aloksrivastava8416]

Nilesh jee i have two question for jigyasa (as it is confusing me since long) 1. From which point on earth all these observations were made? as we know when moon is in between earth and sun it is amawsya. But from which point in earth, if observation point on earth is on line joining sun center, moon center and facing sun then it is day time. if it is from back surface of earth we are obviously not looking toward moon or sun. Hope u understtod the question. 2. all naskatra are visible in night at that time we are looking opposite to sun not toward the sun ,then how we say sun and that particular star is in line . In day star is not visible. please elaborate this Alok Srivastava [e-mail]

[@NileshOak]

Great questions. Who wants to answer these questions?

[@hemant-sathe]

I can attempt this. The speed of earth's rotation is much faster than the movement of moon or earth's movement around Sun. So even though you may say that moon is on the other side, that is true only at same instance of universal time. But then the Sun is also on the other side of the observer. (On amavasya, moon roughly rises & sets with the Sun).So in 12 hrs, the moon is between the observer and the Sun. So there may be slight difference when a tithi begins and ends at a particular location but it is typically same all around the globe.

[@NileshOak]

@@hemant-sathe Thank you. Excellent.

[@aloksrivastava8416]

@@hemant-sathe i partially understand it. but i will think it over more imagining earth sun and moon. Although it answer question 1. but still i am confuse about answer 2. It seems there will will be a particular time for start of measurement when moon sun and all star is visible. is time of meausrement{ (in term of visibility like sun setting down and moon is rising or moon is getting down or sun is rising) godhuli or gobela (dawn or dusk) } is defined ? Nilesh jee u are right person please elaborate

[@parthladola4480]

@@aloksrivastava8416Even though we cannot look at the star behind the sun during daytime, we can still look at which star rises above the sun or the one that sets after the sun.