आपणास माझे लेखन आवडते आहे असे ब्लॉगला भेट देणारांच्या वाढत्या संख्येवरून वाटते. विषेशकरून कर्णकथेला वाचक पुष्कळ मिळाले. आपल्या प्रतिक्रिया जरूर मिळावयास हव्यात! त्याशिवाय लिहीत राहण्याचा उत्साह कसा टिकून रहाणार?
I changed over from Marathi to English for my comments on Shri. Oak's book recently. I continue to get readers but there are no comments! Wonder whether I am boring!
Thursday, July 16, 2015
Epoch of Arundhati -- Cont.
I have no access to elaborate software like Shri. Oak. Once I became aware of the fact that the Celestial North Pole moves in a circular path in the sky, completing a round in 26000 years, I looked at the issue graphically in my own way. I also had occasion to give couple of lectures on this subject. I felt that most of the listeners may not quickly grasp the mathematical approach of Shri. Oak (Investigating deltaRA between Arundhata and vasishtha) if I try to explain it in the short time of a lecture and may lose interest. I prepared a few slides to present the issue pictorially. I found that many listeners got the essence of the problem and the solution and some said so at the end of the lecture. I was happy.
I show below a few of the slides. The pictures are of course not to scale or accurate but give a fair idea to viewer. I hope readers would like them.
This picture shows the view of saptarshi as we see today. They help us to locate the polestar. Arundhati is very close to Vasishtha and is not very bright and cant be seen easily. We can see it only in a blown up view below.
This picture gives an idea of how close the two are today for a naked-eye viewer and how Arundhati is very faint. When Arundhati was maximum ahead of Vasishtha, that was only about 40% of what it is behind today. One can imagin the difficulty of noticing it with naked eye in those days.