Pope Leo: James Webb telescope shows us what the Bible couldn’t

The leader of the world’s 1.4 billion Catholics just called the James Webb Space Telescope a “truly remarkable instrument” that shows humanity things the Bible’s authors could never have imagined.

And he said it with wonder, not anxiety.

On June 16, 2025, Pope Leo XIV addressed young astronomers at the Vatican Observatory’s Summer School of Astrophysics, whose entire 2025 program was dedicated to exploring the universe using data from the James Webb Space Telescope.

In a speech that ranged from ancient scripture to cutting-edge astrophysics, the Pope called the £7.5 billion telescope a “truly remarkable instrument” that reveals the universe’s ancient mysteries , and asked the assembled scientists a question that framed the entire encounter between faith and discovery.

“In our own day, do not the James Webb images also fill us with wonder, and indeed a mysterious joy, as we contemplate their sublime beauty?”

That question, posed by the head of the Catholic Church to a room full of young astronomers, captures something significant about where science and religion stand in 2025.

Not in conflict.

In conversation.

What the Pope Actually Said

The audience took place at the Vatican, where Pope Leo XIV received dozens of young astronomy students and scholars participating in the monthlong summer school sponsored by the Vatican Observatory, held at the observatory’s headquarters in Castel Gandolfo, outside Rome.

The 2025 group was exploring the universe with data from the James Webb Space Telescope, focusing on the telescope’s contributions to the study of the evolution of galaxies, the birth of stars, and planetary systems and the origin of life.

The Pope drew a direct and deliberate contrast between what the biblical authors could perceive and what modern science now makes visible.

“The authors of sacred Scripture, writing so many centuries ago, did not have the benefit of this privilege,” he said.

“Yet their poetic and religious imagination pondered what the moment of creation must have been like.”

He quoted the Book of Baruch: “The stars shone in their watches and rejoiced; and their Creator called them and they said, ‘Here we are!’, shining with gladness for him who made them.”

Then he pivoted to the present.

The Pope noted that the telescope enables scientists to examine exoplanet atmospheres where life might exist and observe nebulae where new planetary systems take shape.

“For the first time,” he said, “we are able to peer deeply into the atmosphere of exoplanets where life may be developing.”

He told the assembled scientists not to hesitate to share the joy and amazement born of their contemplation of the “seeds” that, in the words of Saint Augustine, God has sown in the harmony of the universe.

“The more joy you share, the more joy you create,” he said, “and in this way, through your pursuit of knowledge, each of you can contribute to building a more peaceful and just world.”

What Is the James Webb Space Telescope?

For readers less familiar with what Pope Leo was praising, some context makes his enthusiasm more legible.

The James Webb Space Telescope is the largest, most powerful, and most technically complex space telescope ever built.

It was launched on Christmas Day 2021, a joint project of NASA, the European Space Agency, and the Canadian Space Agency, the product of more than 30 years of planning, engineering, and international collaboration.

It orbits the sun approximately one million miles from Earth, positioned at a gravitational sweet spot that keeps it perpetually shielded from the sun’s heat and light.

Where the Hubble Space Telescope, launched in 1990, observed the universe primarily in visible and ultraviolet light, Webb observes in infrared wavelengths, allowing it to peer through dust clouds, detect the faint heat signatures of objects billions of light-years away, and observe the universe as it appeared in its earliest moments.

It has detected galaxies formed over 13.5 billion years ago and identified potential signs of extraterrestrial life in distant planetary atmospheres.

To observe a galaxy 13.5 billion light-years away is to see it as it was 13.5 billion years ago, when the universe was less than 300 million years old.

Webb is, in effect, a time machine pointed at the beginning of everything.

And it is that fact, the capacity to trace what Pope Leo called “the ancient light of distant galaxies” back to the very origins of the cosmos, that makes its images so striking to scientists and non-scientists alike.

The Vatican Has Been Doing This for Over a Century

What makes Pope Leo XIV’s remarks interesting is not that they are surprising.

They are entirely consistent with a long and largely underappreciated tradition of the Catholic Church actively supporting astronomical research.

The Vatican Observatory, known formally as the Specola Vaticana, is one of the oldest continuously operating astronomical research institutions in the world.

In 1891, in order to counteract longstanding accusations of hostility between the Church and science, Pope Leo XIII formally re-founded the Specola Vaticana.

His explicit mission statement for the observatory was that “everyone might see clearly that the Church and her Pastors are not opposed to true and solid science.”

That mandate has been the observatory’s guiding purpose ever since.

Today it is staffed primarily by Jesuit priest-scientists, conducts cutting-edge astrophysical research published in peer-reviewed journals, and hosts the biannual summer school that Pope Leo XIV was addressing in June 2025.

The observatory’s current director, Father Richard D’Souza, S.J., appointed by Pope Leo XIV in October 2025, has described his scientific work as inseparable from his faith.

“The more I discover the Universe as a scientist, the more I give praise and glory to its Creator,” he has said.

And it was a Catholic priest, the Belgian physicist Father Georges Lemaître, who first proposed the theory that would later be named the Big Bang, the idea that the universe originated from a single, infinitely dense point and has been expanding ever since.

Lemaître developed that theory in 1927 by applying Einstein’s equations of general relativity to the cosmos as a whole.

The origin story of the universe that modern telescopes like Webb are now exploring in extraordinary detail was first mathematically described by a Catholic clergyman.

The Galileo Shadow That Still Haunts the Conversation

Any discussion of the Catholic Church and science eventually arrives at Galileo Galilei, and that arrival is worth making explicit rather than avoiding.

In 1633, the Roman Inquisition forced Galileo to recant his support for heliocentrism, the scientifically correct view that the Earth orbits the Sun, and sentenced him to house arrest for the remainder of his life.

The books of Copernicus, whose heliocentric model Galileo championed, were not removed from the Church’s Index of Prohibited Books until 1835.

Pope John Paul II formally acknowledged the error in 1992, describing it as the result of theologians who failed to grasp the distinction between literal and metaphorical readings of scripture, though critics noted the acknowledgment stopped short of a full apology.

The Galileo affair remains the most cited example of religion and science in destructive conflict, and it is a fair example.

But it is also a story set four centuries ago, in an institution that has demonstrably changed its relationship with scientific inquiry over those intervening centuries.

The Vatican Observatory, staffed by scientists who are also priests, producing peer-reviewed research on cosmology while simultaneously exploring theological questions about what that research means, represents something the Galileo narrative does not easily accommodate: an institution that has chosen, explicitly and institutionally, to treat scientific discovery as compatible with religious faith rather than threatening to it.

Pope Leo XIV’s June 2025 remarks fit squarely within that tradition.

What the Webb Telescope Is Actually Finding

Part of what makes Pope Leo’s engagement with the James Webb Telescope meaningful is that Webb is finding things genuinely worth being astonished by.

Since its first images were released in July 2022, Webb has overturned assumptions, generated new questions, and produced images of the early universe that have left professional astronomers struggling to integrate what they are seeing with existing models of galaxy formation.

Webb has found massive, fully formed galaxies existing far earlier in the universe’s history than current models predicted.

It has produced the most detailed atmospheric analysis of exoplanets ever achieved, detecting the chemical signatures of carbon dioxide, methane, and other molecules in the atmospheres of worlds orbiting distant stars.

A 2023 Webb study of the exoplanet K2-18b detected what appeared to be dimethyl sulphide, a molecule on Earth produced only by living organisms, though researchers were quick to note that the detection requires further confirmation.

Webb has also produced images of star-forming regions, nebulae where new solar systems are assembling themselves from clouds of gas and dust, with a resolution and clarity that no previous instrument could approach.

As NASA describes it, Webb studies every phase in the history of the universe, from the first luminous glows after the Big Bang, to the formation of solar systems capable of supporting life, to the evolution of our own solar system.

It is, by any measure, one of the most consequential scientific instruments ever built.

And the images it produces, freely available to anyone with an internet connection, have reached audiences far beyond the scientific community.

Science as a Shared Human Project

One of the quieter themes running through Pope Leo’s June 2025 address was a point about scientific knowledge as something that belongs to everyone, not just to specialists.

He highlighted the generosity of making the space telescope’s images available to the general public, and reminded the students that they had been given the knowledge and training to use this amazing instrument to expand humanity’s understanding of the cosmos, of which, he said, “we are a tiny but meaningful part.”

That framing, science as a gift to be shared rather than a commodity to be guarded, reflects a view of knowledge that sits comfortably alongside both scientific and religious traditions at their best.

Brother Guy Consolmagno, S.J., President of the Vatican Observatory Foundation, who met the Pope during the summer school and described their interaction as “delightful but brief,” has spent decades articulating this vision publicly.

His argument, consistent across many books and lectures, is that science and religion ask different questions about the same universe, and that the wonder both generate is not in competition but in communion.

The Vatican Observatory’s annual summer school, which draws students from across the globe at the final stage of undergraduate or the beginning of graduate training, is one practical expression of that philosophy.

It places young scientists from different countries, religious backgrounds, and academic traditions in the same setting, working with the same extraordinary data, building the kind of international scientific community that the Pope described as the context within which each individual researcher operates.

“Each of you is part of a much greater community,” Pope Leo told the students.

“Along with the contribution of your fellow scientists, engineers, and mathematicians, it was also with the support of your families and so many of your friends that you have been able to appreciate and take part in this wonderful enterprise.”

Why This Moment Matters Beyond the Vatican

Pope Leo XIV’s remarks about the James Webb Space Telescope matter beyond their theological content for a straightforward reason.

At a moment when scientific authority is contested, public trust in institutions is low, and the relationship between evidence and belief is actively politicised in many parts of the world, the head of the world’s largest religious institution, standing before a room of young astronomers and telling them their work fills him with joy, is not a neutral act.

It is a statement about what science is for and who it belongs to.

It is a signal, to the 1.4 billion Catholics who look to Rome for guidance and to the broader world watching, that curiosity about the cosmos is not an act of faithlessness.

In the Pope’s framing, it is a form of reverence.

The James Webb Space Telescope was built to answer humanity’s oldest questions about where we came from and whether we are alone.

It is about finding answers and raising new questions at a scale and resolution no generation before ours has had access to.

Pope Leo XIV looked at those images and saw, in his words, the seeds that God has sown in the harmony of the universe.

A physicist looking at the same images might see the confirmation of quantum chromodynamics, the evidence of stellar nucleosynthesis, the proof of cosmic inflation.

Both responses are expressions of the same underlying impulse: the recognition that the universe is astonishing, and that looking at it carefully changes you.

That, more than any doctrinal statement, may be what Pope Leo was really asking the young astronomers in that room to carry with them when they left.

The joy of discovery is not a private possession.

It is something to be shared.

And the more you share it, the more of it there is.