How the Sages Knew the Number of Stars Before Modern Science

Throughout history, the Jewish people preserved deep insights about the world, many of which only became understood through modern science much later.

For generations, these ideas were often dismissed as unrealistic or impossible. Yet as technology has advanced, more and more discoveries have begun to align with what is written in ancient Jewish sources.

This raises an intriguing question.

How did the sages know what could not be measured in their time?

In this article, we explore one fascinating example.

The Ancient Debate About the Stars

In the ancient world, there was no way to accurately estimate the number of stars.

Early astronomers believed there were only a few thousand stars in the universe, usually between 4,000 and 6,000.

This made sense based on what the human eye could see.

But the sages of the Gemara presented a completely different picture.

Over 1,500 years ago, they described a number so vast that it was beyond imagination.

The Gemara’s Description

The source appears in the Gemara, in tractate Berachot.

It describes a structured system of creation, built in layers.

Twelve constellations.
Each containing thirty groups.
Each group containing thirty units, and so on, continuing through multiple levels.

At the deepest level, the Gemara states that each unit contains 365 thousands of ten thousands of stars.

This description reflects a highly ordered system, far beyond what was observable at the time.

Understanding the Numbers

When we translate these expressions into numbers, we arrive at an astonishing figure.

A “ten thousand” multiplied by a thousand becomes ten million.

When multiplied further by 365, the result is 3,650,000,000 stars within each unit.

Then, when we calculate the number of these units across all levels described in the Gemara, we reach a total of:

1,064,340,000,000,000,000 stars.

This is more than one quintillion stars.

A Comparison With Modern Science

Today, scientists use advanced telescopes, satellites, and computer models to estimate the number of stars in the universe.

Modern estimates suggest there are around 10 to the 21st power stars.

These numbers are based on observation and sampling, and they continue to be refined as technology improves.

What is striking is not that the numbers are identical, but that the sages described a scale of the universe that is unimaginably vast, far beyond the estimates of their time.

A Deeper Perspective

For many, this comparison highlights the depth of wisdom found in Jewish tradition.

The sages were not working with telescopes or satellites. Their knowledge came from a different source, rooted in the Torah’s understanding of creation.

Whether one sees this as insight, tradition, or something deeper, it invites us to look again at ancient wisdom with fresh eyes.

Continuing the Exploration

This is just one example among many.

Those interested in exploring further can find additional discussions on the relationship between Torah and science in works such as the HaMahapach series.

As science continues to develop, the conversation between ancient wisdom and modern discovery remains as fascinating as ever.