Pages from an unwritten diary

Posted in Blogs (Articles) on September 17th, 2018 by Rajesh Kochhar – Be the first to comment

A match was arranged between a girl and a boy. Evverything was fine except for the postal address of the girl’s family who lived on GB Road in Delhi, well known a a red-light area. The boy’s family insisted that the address printed onthe wedding card should not mention GB Road. One can well imagine the mirth that would have arisen if the true address was printed.

 

Meghnad Saha: Work, life, and times

Posted in Blogs (Articles) on September 1st, 2018 by Rajesh Kochhar – Be the first to comment

Calcutta-based Meghnad Saha (1893-1955) set out his theory to explain stellar spectra in a number of papers published in British journals  during 1920-1921. The work was immediately recognized as laying the foundation of quantitative astrophysics.

History chooses the hour; and the hour produces the hero. The only surprise was that the hour was seized not by any established research centre in the West but by a far-off Calcutta which was nowhere on the world research map.

Though Saha and SN Bose (of Bose-Einstein statistics) were part of the British Empire, professionally they were children of Germany.

 

 

https://www.slideshare.net/rajeshkochhar1/meghnad-saha-work-life-and-times

Indian astrology: Vedic and post-Vedic

Posted in Blogs (Articles) on August 15th, 2018 by Rajesh Kochhar – Be the first to comment

Rajesh Kochhar

The oldest astronomical text in India is Vedanga Jyotisha, which is a part of the Vedic corpus. Its oldest parts could be as old as 1400 BCE. Asoka’s Edicts (3rd cent BCE) are consistent with Vedanga Jyotisha. A feature of this period is the identification of planetary positions with the help of nakshatras. In the centuries following Alexander, Greco-Baylonian inputs were received into India from the northwest which revitalized Indian mathematical astronomy, seen in fully blown form in Aryabhatiyam (499 CE). These inputs include (i) accurate luni-aolar calenndar (the Vikrami or the old Shaka, calendar), (ii) 12 rashis, and (iii) week days. Aryabhata { note the single t} introduced for the first time, in the Indian context, mathematical theory of eclipse which tells you that eclipses take place when the Moon is at one of the two nodes.  Aryabhata’s contemporay, Varahamihira, designated these nodes as shadow planets and named them Rahu and Ketu. This is the beginning of the nava graha concept. I do not think it would have been possible to cast a horoscope according to Vedanha Jyotisha. Present-day astrology and ritual of which the accurate calendar, week days and rashis are integral part is post-Vedic and not Vedic.