Astronomical dating of mahabharata war
Any observer on dark face of earth can see when lunar eclipse when it occurs.
During period 3500BC to 700 BC, nearly 4350 lunar eclipses have probably occurred.
The Bhishma Parva and Udyoga Parva (specific chapters of Mahabharata) provide considerable astronomical/astrological descriptions and omens as the Mahabharata war was approaching.
It describes a period of draught, with many planetary positions.
It probably may have been rewritten/re-rendered many times as the mode of transference was by oral traditions as in the case of Vedic chandas prosody.
The known oldest version has nearly 90,000 to 100,000 poems dominantly with 32 syllables Anushtup chandas, in 18 chapters called Parva's [ref-4 and 5].
This document is basically concerned with analysis of all eclipses visible at Kurukshethra (Location where Mahabharata war took place, north of New Delhi, Longitude 76 deg 49 min East, Latitude 29 deg 59 Min North) from 3300 BC to about Buddha-Mahavira-Parshvanaatha time of about 700BC.
The presently known oldest version of Mahabharata, based on its style, grammar and other features was probably written down before the Gupta period.
text also refers to retrograde motions of planets prior to war and provides their location with reference to 27/28 Vedic star locations.
Mahabharata Drona Parva also refers to Jayadhratha's killing during a dark episode on 13th day of the war, which some consider as another short solar eclipse.
Mahabharata war is considered by many to be a historical event.
The epic states that a singularly ominous pair of eclipses occurred in - Thirteen days - some time before the war.