Refutation of Nilesh Oak’s dating of ancient texts

Refutation of the article “Ancient updates to Sūrya-siddhānta” by Nilesh N. Oak and Rupa Bhaty

In an article in IndiaFacts and two presentations [1–3], Nilesh N. Oak and Rupa Bhaty have claimed that astronomical text Sūrya Siddhānta contains information that can be dated to 12,000 BCE. Oak and Bhaty have cited three astronomical observations from Sūrya Siddhānta that can be simultaneously satisfied only in 12,000 BCE [1]:

The two necessary conditions (two pole stars and points of apoapsis/periapsis during Hemanta/Grishma, respectively) and the optional yet desired third condition of the Earth’s obliquity (equal to 24°) are all satisfied by the year 12000 BCE!

Oak and Bhaty accept that Sūrya Siddhānta was last updated in 580…


Refutation of Rupa Bhaty’s dating of ancient texts

Refutation of astronomical dating of Agastya observation to 19,000 BCE by Rupa Bhaty

In this article I will refute the claim of astronomical connection between Natarāja iconography and Agastya. This thesis has been developed by Rupa Bhaty and described in an article on IndiaFacts [1] and presentations available on Youtube [2–4]. In the article on IndiaFacts, Bhaty asserts:

“Cosmic Natarāja has to do with identification of Agastya’s location. … This astronomical event happened during 11000BCE- 13000BCE.” [1]

In a related presentation, Bhaty takes this connection to over 19,000 BCE [2]. I intend to show that Bhaty has made baseless assumptions to come up with these numbers that defy common sense. …


Refutation of Rupa Bhaty’s dating of ancient texts

Refutation of the article “Fascinating Astronomical and Eustatic Observation by King Bṛhadratha” by Rupa Bhaty

Extraordinary claims require extraordinary evidenceCarl Sagan

I had posted the link to my previous blog on Twitter. There was one comment that if I don’t like Bhaty’s articles, I should just ignore it. This completely misses the point why I am writing these articles. Bhaty’s articles are read by many people and Bhaty is also putting forward her views on Sattology Youtube channel. Many people might have doubts about her extravagant claims and would like to get a second opinion. My articles are written to give the second opinion, nothing more and nothing less. I am going to…


Refutation of Rupa Bhaty’s dating of ancient texts

Refutation of the article “Samvatsara in Vishuva-Vernal Equinox at Uttarā Phālgunī- Epoch 10,000 BCE-Evidence from Taittiriya Brāhmana” by Rupa Bhaty

In my previous articles I have presented a summary of my research on the origins of ancient Indian astronomy. I have also presented astronomical dating of some ancient texts. The picture that emerges from my research is that the formative period of Indian astronomy is 4th millennium BCE and some Vedas and Brāhmaṇas can be dated to 3rd millennium BCE. Contrary to this, some Indic researchers are dating many Indian texts to much older periods based on astronomical dating. Fantastic claims are being made, and since these claims are not being falsified by experts, a large number of people are…


Discovery of the Original Boundaries of Nakshatras

Part 8 of 8- Indus Valley Civilization was Vedic Civilization

In my previous articles, I have established that original boundaries of nakṣatras were different from currently accepted boundaries [1–3]. The origin of the original boundaries was at the yogatārā of Rohiṇī, which was the beginning of Rohiṇī nakṣatra or end of Kṛttikā nakṣatra. This gives us precise dates for the position of sun among the nakṣatras during equinoxes and solstices as shown in Figures 1 and 2. We can use these dates to gain significant insights into Indian history in an objective manner.

Figure 1: The position of sun during equinoxes in the Rohini system [3]


Discovery of the Original Boundaries of Nakshatras

Part 7 of 8 — Taxila was the Centre of Vedic Astronomy

According to Vedāṅga Jyotiṣa there are 30 muhūrttas in a day and night (Ṛk Vedāṅga Jyotiṣa 16, Yajus Vedāṅga Jyotiṣa 38) and during the course of the year days and night increase or decrease by a maximum of 6 muhūrttas (Ṛk Vedāṅga Jyotiṣa 7, Yajus Vedāṅga Jyotiṣa 8). Thus the ratio of daylight duration to night duration was 1.5 (3:2) on summer solstice and the ratio of night duration to daylight duration was 1.5 (3:2) on winter solstice. …


Discovery of the Original Boundaries of Nakshatras

Part 6 of 8 — The Dating of Vedanga Jyotisha to ~1830 BCE

Currently, the Vedāṅga Jyotiśa is dated between 1150 BCE to 1400 BCE [1]. The Vedāṅga Jyotiśa is the first astronomical text of ancient Indian civilization and the determination of the correct date of the composition of the Vedāṅga Jyotiśa is of vital importance in discovering the correct chronological history of India.

There is a very specific observation in the Vedāṅga Jyotiśa that makes it straight forward to calculate the date of its composition. It is mentioned in the verses 6–8 of the Yajur-Vedāṅga Jyotiṣa that the winter solstice was at the beginning of the Śraviṣṭhā (Dhaniṣṭhā) nakṣatra and the summer…


Discovery of the Original Boundaries of Nakshatras

Part 5 of 8 — The Dating of Varāhamihira to 123 BCE

According to the Indian tradition, Varāhamihira was one of the nine gems in the court of Emperor Vikramāditya. Vikrama era named after Emperor Vikramāditya has its zero point in 57 BCE. Modern history denies the existence of Emperor Vikramāditya in 57 BCE and has placed Varāhamihira in sixth century CE, whose time was in 1st century BCE if Indian tradition is to be believed. The reason for this disagreement lies in the interpretation of Śaka era used by Varāhamihira.

1. A tale of two eras

Varāhamihira has himself given his date by saying that he wrote Pañchasiddhāntikā in 427 Śaka [1]. Based on the zero point…


Discovery of the Original Boundaries of Nakshatras

Part 4 of 8 — Introducing Ashwini Paksha Ayanamsha

Currently calendar makers and astrologers use a concept called Ayanāṃśa which is the longitude difference between the zero point in ancient India and current zero point called the first point of Aries. This concept is shown in Figure 1 below. Point ♈ is the first point of Aries, from which longitude is measured in tropical ecliptic coordinate system. This point keeps changing with respect to the background stars due to precession. In ancient India, the coordinate was measured from a fixed star. This star was the star Aldebaran, the yogatārā of Rohiṇī, as discussed in my previous article [1]. As…


Discovery of the Original Boundaries of Nakshatras

Part 3 of 8 — The Clock in the Sky

In my previous article I showed that the original boundary of the beginning of the Aśvinī nakṣatra was at 8° from Hamal, the yogatārā of Aśvinī. The boundary of the beginning of the Aśvinī nakṣatra was later shifted to the yogatārā of Revatī in sixth century. These two points are separated by 10° as shown in Figure 1, point A being the original boundary of the Aśvinī nakṣatra and point R being the currently accepted boundary. These two points are related to the yogatārās of Rohiṇī and Kṛttikā nakṣatras.

Figure 1: Two points denoting the beginning of Aśvinī nakshatra

1. Rohiṇī system

The span of each nakṣatra is 13° 20′…

Dr. Raja Ram Mohan Roy

Vedic Scholar, Materials Scientist, Author of books on Vedic Astronomy, Jain Astronomy, and Ancient Indian History

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