Smitha Vishveshwara
Reeling from a divisive and turbulent election season, many of us seek spaces of solace, light, unity and worship as we turn toward the winter holidays.
The cosmos and its reflection within us harbor such spaces.
By viewing and embracing scientific insights through the lens of humanity, you form a connection with your place in the universe. And when you do so, a window opens into the sacred space of our profoundly united existence.
Earlier this year, a celestial event cast its splendor along a belt traversing our nation — the total solar eclipse. During totality, day turned to night. The sun’s corona blazed around its darkened disc. A moment so visceral, unwitting animals could palpably feel it. Transcending age, walks of life, race and politics, the eclipse brought millions together in a communion of cosmic wonder.
In my family of three generations, some drove from Illinois to Indiana, while others traveled from India in time for the event. Our shared experience formed immediate bonds with hitherto unknown friends.
As a scientist, the eclipse also offered me spectacular links to two modern revolutionary branches of physics that have completely changed our perception of nature: relativity and quantum physics. As my late black hole physicist father would delight in sharing, a solar eclipse was needed to demonstrate the bending of light around the sun, sealing predictions of Albert Einstein’s relativity in 1919. As for the quantum revolution, its technological marvels are part of our daily lives: lasers, semiconducting circuit elements, MRI machines, and more.
A practicing quantum physicist, I rejoice at the unity of our common quest. Scholars come together from across the world to the United States, collaborating, learning, mentoring. Just as my parents did — my mother, a biophysicist — half a century ago. During the eclipse, I felt a heightened awe for the phenomenon that sparked this revolution.
Humans and stars radiate light in the same way. An ever-present miracle on Earth — we are all perfectly glowing beings in our unhindered outpouring!
What is this universal light? "Blackbody radiation,” as physicists call it, is the common pattern of light that emanates from stars, heated metal, the universe and you and me.
We are all effulgent blackbodies. Our radiation pattern depends only on the body’s intrinsic temperature. For a star, it peaks in the visible range and depending on its temperature, appears anything from red to blue in the rainbow spectrum. For mammals, reflecting a similar body temperature across species, the radiation peaks in the infrared. Through an infrared camera, we can perceive our glowing warmth.
Our Earth, too, is nearly a blackbody. Save for the atmosphere — a thin veneer trapping heat and balancing a temperature range that sustains life. A delicate balance that we humans can disrupt by pumping this veneer with emissions.
Quantum physics grew from contemplating this universal pattern. Understanding it required re-envisioning light not as a wave, but as a bundle of energy, a photon. This seed gave way to mind-boggling notions and theories that explain so much of the world, starting with our current description of the atom. Today, quantum science thrives splendidly across the globe. Looking ahead, the U.S. National Quantum Initiative passed as an act of Congress with bipartisan support, meaning that throughout 2025, the world will celebrate a United Nations International Year, commemorating a century of quantum science and its wonders.
The seed that gave birth to all this brings alive a luminous sacred space. The universe, the stars, humans — all mirroring one another in radiance. A sacred space of awe and care as you might find in nature — lying in a pine forest, walking by a mountain range, immersing in the ocean’s infinity. Or in an act of worship — praying together beneath a spire or dome, meditating in a sanctum, dancing in spiritual ecstasy, feeding a child, creating patterns of colored chalk powder to be blown away by the wind. We are here as but one burst in space and time. Contemplating our mortality, do we not hold the sacred all the more precious?
In the afterglow of Thanksgiving — a relatively new holiday, in cosmic terms — I invite you into this space. An invocation that can bring joy, universal love and gratitude. A contemplation that comes as a prayer. On the veneer of the Earth, just as the celestial sphere is riddled with a billion blazing stars, we form a human galaxy of glowing beings. Nodes of an interconnected complex web. Connecting in the smiles of strangers passing by, in our exchanges, our altercations included, in a shoulder to rest on in moments of deep pain, in a shared meal, in an
embrace.
The stretches of darkness grow longer in the winter, and we kindle fires. We illuminate our festivities with clusters of light. In all this, each of us carries within ourselves a burnishing lamp. Each of us is a radiant, glowing being.
(Smitha Vishveshwara is a professor of physics at the University of Illinois Urbana-Champaign and a Public Voices Fellow with the OpEd Project.)