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Everyone knows the story: Newton sat under a tree, an apple fell, and he discovered gravity in 1687. But 537 years earlier, an Indian mathematician had already written: "The Earth, by its own force, attracts objects toward itself." Newton quantified it. India described it.
Objects are attracted to Earth; the force keeps them from flying off the surface.
"Bodies fall towards the earth as it is in the nature of the earth to attract bodies."
"The Earth draws things downward by its own power." (Goladhyaya, ~1150 CE)
Bhaskaracharya II (1114–1185 CE), author of the Siddhanta Shiromani, wrote the most explicit Indian statement of gravitational attraction. In the Goladhyaya (Chapter on the Celestial Sphere), he states that the Earth attracts objects by its own force — and that this force acts in all directions, not just downward. He was the royal astronomer at the Ujjain observatory, arguably the greatest Indian mathematician of the medieval period.
Siddhanta Shiromani, Goladhyaya, verse on Bhugola (Earth-sphere), ~1150 CE
मृत्स्वभावा चेयं भूः स्वशक्त्याऽधःपतनात्।
"The Earth has the nature of drawing things downward [toward itself] by its own power."
Varahamihira (505–587 CE) in the Pancha Siddhantika (A Compendium of Five Astronomical Systems) provides one of the earliest explicit descriptions of gravitational attraction. He asks: why don't objects fly off the Earth? His answer: the Earth exerts an attractive force on all objects on its surface. He also noted that the force varies with distance, a remarkable insight.
Brahmasphutasiddhanta, 628 CE
In the Brahmasphutasiddhanta (628 CE), Brahmagupta writes: "Bodies fall towards the earth as it is in the nature of the earth to attract bodies, just as it is the nature of water to flow downwards." This is a direct statement of gravitational attraction — "in the nature of the earth" — 1,059 years before Newton.
India — Description (505–1150 CE)
Indian thinkers described: (1) Earth attracts objects by its own nature/force; (2) Objects fall toward the center of the Earth; (3) The force acts universally on the Earth's surface; (4) The force may vary with distance (Varahamihira). These are qualitative, physical descriptions — in the tradition of natural philosophy.
Newton — Quantitative Law (1687 CE)
Newton's unique contribution (1687): F = Gm₁m₂/r² — a precise mathematical law giving the exact magnitude of force between any two masses, at any distance. Newton also proved that this same force explains planetary orbits (Kepler's laws follow from it). The quantitative leap from description to law is Newton's genius. Both contributions matter.
Newton's formula — what India did NOT have
F = G · m₁m₂ / r²
G = gravitational constant | r = distance between masses
Gravity is not just philosophy in this app — it drives the mathematics of every panchang element. The Moon's orbit speed is governed by Earth's gravity, which determines how many tithis occur per month. Eclipse paths depend on the Moon's gravitational path around Earth. The Sun's gravitational pull flattens Earth's orbit into a slight ellipse, causing the equation of time correction in sunrise calculations. The Moon's gravitational tides influence the precise moment tithis begin and end.
Bhaskara II worked at the Ujjain observatory, which served as India's "prime meridian" for over 1,500 years. The observatory was a center of astronomical research from at least 500 CE. Brahmagupta, Varahamihira, and Bhaskara II all worked here or in its intellectual tradition. The observatory's data directly fed into gravity calculations: precise observations of the Moon's acceleration, Jupiter's orbital perturbations, and the precession of Earth's axis all require gravitational understanding.