In the Hanuman Chalisa, Saint Tulsidas described the distance from the Earth to the Sun about 500 years ago in a way that appears quite close to modern scientific measurements. At that time, modern astronomy and precise measuring instruments did not exist. Therefore, this line does not seem limited merely to poetic imagination. It also sparks scientific curiosity. Is this just symbolic language or an indication of some ancient knowledge?
Distance between Earth and Sun Hanuman Chalisa
A chaupai (a four-line verse) from the Hanuman Chalisa, “Juga Sahasra Jojana Para Bhanu,” describes the distance between the Sun and the Earth. According to the calculation derived from this chaupai, the distance from the Sun to the Earth is approximately 9.6 million miles or 15.36 million kilometres, which is quite close to modern scientific calculations.
- Verse: “Juga Sahasra Yojana Para Bhanu. Leelyo Tahi Madhura Phala Janu.”
- Calculation (Conversion Factors):
- 1 Yuga = 12,000 years
- 1 Sahasra = 1,000
- 1 Yojana = 8 miles
- 1 mile = 1.6 kilometers
- Distance Calculation: 12,000 × 1,000 × 8 = 96,000,000 miles
- In Kilometers: 96,000,000 × 1.6 = 153,600,000 (approximately 15.36 crore kilometers)
What Does Science Say About the Earth-Sun Distance?
The average distance from the Earth to the Sun is approximately 150 million kilometres (93 million miles). It is truly astonishing how Tulsidas ji wrote such an accurate measurement. Let’s delve deeper into the science of the Earth-Sun distance.
The average distance between the Earth and the Sun is approximately 1 Astronomical Unit (1 AU), which is approximately 149,597,870.7 kilometres (approximately 149.6 million kilometres). This number is commonly written as 149.6 million km in kilometres, and it is equivalent to approximately 92.96 million miles.
The Earth does not orbit the Sun in a perfectly circular path; instead, its path is slightly elliptical (oval-shaped). Due to this shape, the distance between the Sun and the Earth changes throughout the year.
Typically, in January, the Earth is closest to the Sun (approximately 147.1 million km), a phenomenon known as the Perihelion. Conversely, in July, it is farthest away (approximately 152.1 million km), a point known as the aphelion.
There is a difference of about 5 million km between these two positions over the course of the year, which shows that the Earth’s orbit is not perfectly round but slightly stretched (elliptical).
It takes an average of 8 minutes and 19 seconds for light to travel from the Sun to the Earth. Light travels at a very high speed, about 300,000 kilometres per second.
Since the distance between the Earth and the Sun changes throughout the year, the time taken for the light to arrive also varies slightly. When the Earth is closest to the Sun (Perihelion), it takes about 8 minutes and 11 seconds for light to reach us, and when it is farthest away (Aphelion), it takes about 8 minutes and 27 seconds.
Surprisingly, when we look at the Sun, we are seeing it as it was about 8 minutes ago. Since it takes time for light to travel, we always see an 8-minute-old version of the Sun.
Furthermore, although the changing distance throughout the year causes slight variations in the amount of sunlight reaching Earth, it has a minimal impact on our local weather and temperature. Other factors are more responsible for the major changes in the weather/seasons.
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