Thread by @punarUtthana108

Earth rotates

West - 1543 (Nicolaus Copernicus)

Bharat - 2 million years (Sūrya Siddhānta)
or
presently believed 6th-century BC, which still makes it oldest book on earth in Astronomy to mention Earth as sphere not flat

Sūrya Siddhānta has fourteen chapters

All copied it

1/n

Al-Biruni 11th-century Persian scholar and polymath mentioned about text named Surya Siddhanta written Lāta

He copied many things from it

Surya Siddhanta attributes the words to an emissary of solar deity as recounted to Maya at end of Satya Yuga two million years ago

2/n

Translation of Greek works was taken up in 9th century

Arabs embarked upon translation of Sanskrit texts from India much before that

These works were translated in Arabic by Al-Fazari,who emerged as first Arab Astronomer of great repute

Basically He copied and pasted

4/n

Acc to Tabqatul Umam a delegation from India came to Baghdad in 771

some 250 years after death of Aryabhatta

One of them was Kanaka, who carried with him a small library including a book titled Surya Siddhanta and works of Aryabhata and Brahamgupta

5/n

Table of contents in Surya Siddhanta are :-

The Mean Motions of the Planets

True Places of the Planets

Direction, Place and Time

The Moon and Eclipses

The Sun and Eclipses

The Projection of Eclipses

Planetary Conjunctions

Of the Stars

Risings and Settings

6/n

Cont...

The Moon’s Risings and Settings
Certain Malignant Aspects of the Sun and Moon

Cosmogony, Geography, and Dimensions of the Creation
The Gnomon

The Movement of the Heavens and Human Activity

7/n

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