When Numbers Become Silence: The Universe, Life, and the Mystery Beyond Measure
by lim ju boo (my Chinese name is lin ru wu (林 如 武)
When I was about 15 years old, I used to bathe besides a water well in the village of my classmate in Batu Pahat, Johore, Malaya. I used to help milk the cows of my classmate’s parents who were cowherds. I used to bathe at 5 am under an open sky before my classmate and I cycled to school before 7 am. I used to look up besides the water well at the Milky Way - the faint splendour of lights across the clear skies with untold numbers of stars twinkling among the Milky Way above. The Milky Way core rises in the early morning hours, starting from late February and March - the month of my birth, and is visible until October. From March till June the centre of the Milky Way rises just before sunrise, making the 5:00 am the optimal time to see it before daylight obscures it.
July till October, the Milky Way is more prominent in the evening, but it is still visible in the early hours of the morning as saw it while bathing besides a village water well.
As I looked at the beauty of God’s Creation even in my teens, I then wondered if there was life out there with beings living in complete peace and joy.
Today, let me re-echo with you those earlier memories with only a very, very slightly better understanding today.
But first, let me give a spiritual introduction before we measure the stars.
Before we begin to measure the universe in numbers, before we speak of billions and trillions, of light-years and cosmic expansion— perhaps when we became endowed with wisdom and humility, we begin to pause in stillness.
For long before telescopes were ever conceived, humanity has always looked up at the night sky with a sense of wonder that transcends calculation. The silent spread of stars has stirred something deep within the human soul: a question not only of what is out there, but why it exists at all.
Science, with its precision and discipline, has given us the tools to explore the heavens. It has revealed a universe vast beyond imagination, governed by laws that are elegant and consistent. Yet even as science advances, it does not erase wonder, it deepens it.
For the more we discover, the more we are confronted by mysteries that lie beyond measurement. We ask ourselves these:
1. Why does the universe exist?
2. Why do its laws allow for life?
3. Why are we able to understand it at all?
To some, these questions are philosophical. To others, they are spiritual. And to many like my simple self, they are both.
There is a quiet possibility that the universe is not merely a collection of matter and energy, but a reality that carries meaning, one that invites reflection, humility, and perhaps even reverence.
As we now journey into the scientific exploration of the cosmos, the galaxies, the stars, the countless worlds, and the search for life beyond our own—we do so not only with the mind, but with the heart.
For in the end, the study of the universe is not just about understanding the heavens above us. It is also about understanding our place within it.
The Universe That Outgrows the Mind:
There comes a point in science where numbers cease to inform and begin to humble us.
We are told by astronomers and cosmologists that the universe is 13.8 billion years old, and yet the portion we can observe stretches across an astonishing 93 billion light-years. This is not a contradiction, but a revelation: space itself has been expanding, carrying galaxies ever farther apart, so that the light we now receive began its journey when the universe was young, from regions that are now unimaginably distant.
The universe is now known to us to be expanding like a curtain being drawn.
"He stretches out the heavens like a curtain" is a revelation from the Bible (notably Isaiah 40:22, Psalm 104:2) describing God's creative power in forming the heavens - the universe as science calls it. It depicts the heavens or the universe as a tent or canopy spread out for habitation - with other worlds, life and civilizations in them, symbolizing divine majesty, ease of creation, and, for some, an anticipation of an expansive, modern cosmology.
Beyond this observable horizon lies a deeper mystery. The universe may extend far beyond what we can ever see, perhaps finite but vast beyond comprehension, or perhaps truly infinite.
And so, we stand within a cosmic boundary, aware that what we know is only a fraction of what exists.
When Numbers Lose Their Meaning:
To speak of the universe, we must use numbers that strain human language:
Billion = 10⁹ (1 followed by 9 zeros)
Trillion = 10¹² (1 followed by 12 zeros)
Sextillion = 10²¹ (1 followed by 21 zeros)
Septillion = 10²⁴ ( 1 followed by 24 zeros)
It is estimated that there are:
~2 × 10¹² galaxies (2 followed by 12 zeros)
~10²⁴ stars (1 followed by 24 zeros)
At least ~10²⁴ planets (1 followed by 24 zeros)
But what does 10²⁴ truly mean?
It is not a number we can visualize. It is a number that dissolves imagination.
And yet, within such immensity, we exist.
The sands beneath our feet, as the sands by the water well I used to bathe at 5 am under an open sky in the village in my teens, were the same stars that still stand above our heads.
It has often been said that the stars in the universe outnumber the grains of sand on Earth.
Science now suggests this is not poetic exaggeration, but sober truth.
Grains of sand on Earth: ~10¹⁸ to 10²⁰
Stars in the universe: ~10²⁴
For every grain of sand I hold in my hand, there are thousands of stars shining in the cosmos.
And yet, among all these stars, there is one small world where you and I can ask such questions such as:
Is the Universe Filled with Possible Worlds
Modern astronomy has revealed that planets are not rare; they are the rule.
Around distant stars, countless worlds orbit in what scientists call the habitable zone – the Goldilocks Zone where temperatures may allow liquid water to exist. In our own Milky Way, there may be hundreds of millions to billions of Earth-like planets.
At this very moment, the James Webb Space Telescope is peering into the atmospheres of some of these worlds, searching for faint chemical signatures—oxygen, methane, carbon dioxide, that might be whisper of life.
For the first time in human history, we are not merely wondering if we are alone.
We are beginning to look at
question that echoes across the cosmos. With such overwhelming numbers, one might expect life to be everywhere. And yet, we do not know.
The Drake Equation attempts to estimate the number of civilizations in our galaxy, but its variables remain uncertain. Some scientists suggest that life may be common; others believe the emergence of life—abiogenesis that may be so improbable that we could be alone.
Here lies a profound tension:
The universe is vast enough for life to be abundant, yet silent enough to make us wonder if it is rare.
The Impossibility—and Possibility—of Another “You”
Could there be another Earth? - perhaps.
Could there be another world with oceans, mountains, and skies like ours?
Very likely.
But could there be another Earth identical in every detail—every life, every thought, every moment?
Within the observable universe, the answer is almost certainly no.
The number of possible arrangements of matter, the countless pathways of biological evolution, the unfolding of history, all combine into a complexity so immense that duplication becomes effectively impossible.
And yet, if the universe is infinite, as some theories suggest, then even the impossible becomes inevitable.
Somewhere, beyond all distance, another version of this world may exist.
When Science Meets Silence:
At the edge of all these calculations, something unexpected happens.
Science does not end in certainty—it ends in silence.
Not the silence of ignorance, but the silence of awe.
We can measure the age of the universe.
We can count galaxies.
We can detect molecules in distant atmospheres.
But we cannot yet answer the deepest questions:
Why does the universe exist at all?
Why does it permit life?
Why are its laws so finely balanced?
To some, these are merely unanswered scientific problems.
To others, they hint at something deeper, a design, a purpose, or a reality beyond measurement.
We are looking into a mirror of existence itself.
A universe of 10²⁴ stars has produced, at least once, a being capable of asking:
Whether life is abundant or rare, whether the universe is finite or infinite, one truth remains:
We are part of this vastness, yet able to reflect upon it.
When I stand beneath a clear silent night sky, I am not merely looking outward.
I am are looking into a mirror of existence itself.
A universe of 10²⁴ stars has produced, at least once, a being capable of asking:
“Am I alone?”
Whether life is abundant or rare, whether the universe is finite or infinite, one truth remains:
We are part of this vastness, yet able to reflect upon it.
And perhaps that, in itself, is the greatest mystery of all.
“Am I alone?” - that's me - a simple and insignificant lim ju boo, my soul is asking
References for Further Reading
Here are credible and accessible sources readers can cite or explore further:
Cosmology & Structure of the Universe
1. NASA: Excellent overview of the observable universe, galaxies, and cosmology
2. European Space Agency
Clear explanations on cosmic expansion and deep space observations
3. Planck Mission
Precision measurements of the age and structure of the universe
4.A Brief History of Time
A classic explanation of the universe’s origin and structure
Exoplanets & Search for Life
1. James Webb Space Telescope
Latest discoveries on exoplanet atmospheres and biosignatures
2. SETI Institute
Scientific efforts to detect intelligent life
3. Drake Equation
Framework for estimating extraterrestrial civilizations
4. The Cosmic Connection
Thoughtful reflections on life in the universe
Philosophical & Reflective Works
Cosmos
1. A beautiful blend of science and human meaning
2. The Grand Design
Explores fundamental questions of existence
3. The Language of God
A dialogue between science and faith
Scientific Papers & Data Sources (Advanced Reading)
1. NASA Exoplanet Archive
2. arXiv
3. Nature Astronomy
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