From Yugas to the Big Bang: A Comparative Analysis of Hindu and Modern Cosmology

According to modern science—particularly astronomy and cosmology—the age of the universe is approximately 13.8 billion years. It is believed to have originated from a massive explosion known as the Big Bang, and the universe has been continuously expanding ever since. This age has been determined based on various observations and mathematical models, such as Cosmic Microwave Background Radiation (CMBR), the rate of the universe’s expansion (Hubble constant), and measurements of the age of the oldest stars.

Creation and Dissolution in Hinduism (Brahma’s Day and Night)

In Hinduism, the creation, preservation, and dissolution of the universe are viewed as a cyclical process linked to the day and night of Brahma:

Kalpa (Brahma’s Day): A single day of Brahma is known as a Kalpa. It is equivalent to 4.32 billion human years. During this period, the universe is created and continues to exist.

## Brahma’s Night

When a day of Brahma concludes, his night lasts for an equal duration, during which the universe undergoes dissolution and reverts to an unmanifest state. This period also spans 4.32 billion human years.

## Brahma’s Lifespan

Brahma’s lifespan is 100 Brahma-years. Upon the completion of these 100 years, a Mahapralaya (Great Dissolution) occurs; the universe completely dissolves, and Brahma himself merges into the Supreme Brahman. Subsequently, the cycle of creation begins anew.

1 Brahma-year = 360 × (one day + one night of Brahma) = 360 × (4.32 billion + 4.32 billion) = 360 × 8.64 billion = 3,110.4 billion human years. 100 years of Brahma = 3,110.4 billion × 100 = 311.04 trillion human years.

The concept of cosmic time presented is far vaster than our everyday understanding of time. Science speaks of 13.8 billion years, whereas in Hinduism, a Kalpa spans 4.32 billion years, and Brahma’s lifespan of 100 years extends to 311 trillion years. Both perspectives highlight the infinity of the universe and the immense timescale of its creation.

The Beginning of Creation

The scientific Big Bang theory posits a specific origin for the universe, where everything emerged from a singular, infinitesimal point. Similarly, the Hindu concept of creation—transitioning from the unmanifest to the manifest at the beginning of a Kalpa—points to a comparable origin, wherein the universe emerges from a dormant state.

The ongoing phase of creation:

According to Hinduism, fifty years of the current Brahma have elapsed, and the first Kalpa of his fifty-first year is now underway. The current Kalpa is known as the Shveta-Varaha Kalpa. Within this Kalpa, the Kali Yuga of the 28th Mahayuga (or Chaturyuga) is currently in progress.

To date, since the beginning of this Kalpa, six Manvantaras and twenty-seven Mahayugas of the current Vaivasvata Manvantara have elapsed. The Satya, Treta, and Dvapara Yugas of the 28th Mahayuga have also concluded, and the Kali Yuga is currently in progress. According to this calculation, a significant portion of this Kalpa has already passed. If we convert this calculation into solar years, it appears that the current period of Brahma’s 51st Kalpa has already spanned several billion years. The duration of a Kalpa is 4.32 billion years. If we assume that the age of the current universe (13.8 billion years) falls within this cycle, then the age determined by science is qualitatively consistent with the duration of a Kalpa in Hinduism. In other words, the duration of a day of Brahma (a Kalpa—4.32 billion years) is of the same order of magnitude as the modern scientific age (13.8 billion years). .

~ Mithila Bosu 26-06-2026