James Webb directly photographs a distant twin of Jupiter 12 light-years away

Introduction: an exceedingly rare direct image in astronomy

Epsilon Indi Ab, a discovery that changes the game

Did you know that the James Webb Space Telescope has just pulled off a feat rarely achieved in astronomy: directly photographing a giant gas exoplanet, rather than detecting it indirectly through the transit method? The object in question is called Epsilon Indi Ab, a massive Jupiter-like planet located roughly 12 light-years from Earth, making it one of the closest giant exoplanets ever directly imaged.

This observation was carried out by an international team led by the Max Planck Institute for Astronomy in Germany, which used the coronagraph on the Webb telescope, an instrument specifically designed to block a star's dazzling light in order to reveal the much fainter objects surrounding it, such as planets.

Published in May 2026, this discovery opens an unprecedented window onto the direct observation of distant worlds, a method that provides far richer information than the indirect detection typically used to spot exoplanets.

The Epsilon Indi system has long been known to astronomers because of its relative proximity to our own Sun, but it was only thanks to the exceptional sensitivity of the James Webb telescope that scientists were able to directly confirm the presence of this giant planet and study its characteristics in such detail.

Why direct imaging changes everything

The vast majority of known exoplanets to date have been detected using the so-called transit method, which involves observing the slight dip in a star's brightness as a planet passes in front of it. This technique, while extremely effective, does not always yield an actual image of the planet itself, nor does it allow direct analysis of the light it emits or reflects.

Direct imaging, by contrast, actually captures the planet's own light, opening the door to a much more detailed chemical analysis of its atmosphere. There is something deeply moving about watching a point of light appear in an image that corresponds to an actual planet, rather than a mere variation in a light curve interpreted by a computer.

This approach nevertheless remains extremely difficult to pull off, since a star's light is generally millions of times more intense than that of its planets, a challenge that only the most sophisticated instruments, like those on the Webb telescope, are able to meet today.

Before the advent of the James Webb telescope, only a few dozen exoplanets had ever been directly imaged in the entire history of astronomy, a tiny number compared to the thousands of exoplanets discovered through the transit method or the radial velocity method. That imbalance alone shows just how demanding direct imaging remains, even with today's most advanced instruments.

A twin of Jupiter, but not quite identical

An orbit four times wider than Jupiter's

In orbital terms, Epsilon Indi Ab shows a notable difference from its cousin in our solar system. While Jupiter orbits roughly 778 million kilometers from the Sun, this exoplanet sits at an orbital distance roughly four times greater relative to its star, making it a far colder and far more isolated world than the gas giant in our own system.

This large orbital distance partly explains why astronomers were able to photograph it directly: the farther a planet is from its star, the easier it becomes to optically separate its light from that of the central star, reducing the glare that usually makes this kind of observation so complex.

A planet this far out also takes much longer to complete a full orbit around its star, meaning a single year on Epsilon Indi Ab likely corresponds to several dozen Earth years, a timescale that is difficult to picture concretely.

Its host star, Epsilon Indi A, is an orange dwarf relatively similar to the Sun in terms of characteristics, which makes this planetary system particularly interesting for comparisons with our own nearby cosmic neighborhood.

The mass of Epsilon Indi Ab is estimated at several times that of Jupiter, making it a particularly massive gas giant, although its surface temperature is significantly lower than that of our own gas giant, owing to its considerable distance from its star and the much weaker warmth it receives.

Astronomers estimate that the temperature of Epsilon Indi Ab's outer atmosphere hovers just a few degrees above absolute zero, a frigid environment that contrasts sharply with the furnace-like conditions found on exoplanets much closer to their star, such as 55 Cancri e.

An atmosphere that harbors ammonia

Spectroscopic analysis carried out by the James Webb telescope detected the presence of ammonia in the atmosphere of Epsilon Indi Ab, an important chemical discovery that helps scientists better understand the composition of gas giants located far from their star.

This detection of ammonia is a valuable piece of information, since the presence or absence of certain chemical compounds in an exoplanet's atmosphere reveals a great deal about its temperature, internal pressure, and the dynamic processes stirring its cloud layers.

On Jupiter, ammonia is also present in notable quantities in the upper layers of the atmosphere, which strengthens the comparison between the two planets while highlighting some important differences linked to the much lower temperature on Epsilon Indi Ab.

What strikes me is that our technology can now read the chemistry of a planetary atmosphere twelve light-years away, a feat that would have seemed utterly unimaginable barely twenty years ago, even to seasoned experts in the field.

How the Webb telescope's coronagraph made this image possible

Blocking a star's light to reveal its planets

The coronagraph is an optical device that physically masks a star's direct light, somewhat like using a hand to block the Sun in order to better see the clouds around it. This technique reveals much fainter objects located near the star's apparent position, such as planets or dust disks.

The James Webb telescope has several coronagraphs built into its instruments, specifically designed for this type of observation, making it one of the most capable tools ever built for the direct imaging of exoplanets.

Thanks to this technology, astronomers can not only detect the presence of a planet, but also track its movement around its star across multiple successive observations, thereby confirming that it is indeed an orbiting object and not a background star.

What strikes me as remarkable is the precision required to distinguish a point of light this faint amid the glare of a star, an optical feat that borders on technological magic.

An international team coordinated by the Max Planck Institute

This discovery was made possible through the work of an international research team led by the Max Planck Institute for Astronomy, based in Germany, which regularly collaborates with other research centers around the world to make the most of the Webb telescope's capabilities.

This collaboration illustrates once again how much modern astrophysics research depends on collective work bringing together researchers from many countries, each contributing specific expertise to the analysis of data collected by instruments as complex as the Webb Space Telescope. No single laboratory, however well funded, could realistically shoulder the entire analytical workload on its own.

The raw data gathered by the James Webb telescope was subsequently shared with other research teams around the world, as part of a cross-verification process meant to ensure the reliability of the conclusions published about Epsilon Indi Ab.

What this discovery changes for the study of exoplanets

A new window onto the diversity of planetary systems

The direct photograph of Epsilon Indi Ab demonstrates that the Webb telescope can now image and chemically analyze giant exoplanets located at considerable distances, without relying solely on the transit method, which remains limited to certain favorable orbital configurations.

This capability considerably widens the field of directly observable exoplanets, paving the way for the study of a greater diversity of planetary systems, particularly those whose planets orbit too far from their star to be detected by transit.

Researchers now hope to apply this same method to other nearby planetary systems, in the hope of drawing up a more complete inventory of the gas giants present in our immediate galactic neighborhood. Building such a catalog would give scientists a much better statistical picture of how common, or rare, worlds like Epsilon Indi Ab really are.

There is something dizzying about the thought that our galaxy probably harbors thousands of gas giants similar to Epsilon Indi Ab, the vast majority of which remain completely invisible to our current instruments.

A stepping stone toward the study of smaller worlds

Although this discovery concerns a giant gas planet, the direct imaging techniques refined through Epsilon Indi Ab represent an important step toward the future observation of smaller rocky planets, a far more ambitious goal given their much lower brightness compared to gas giants.

This methodical progression — perfecting instruments on more accessible targets before aiming at more difficult ones — reflects the careful, cumulative approach that defines observational astrophysics research.

The next generations of space telescopes, currently in development, should further improve this direct-imaging capability, potentially paving the way for the first photograph of a rocky planet comparable to Earth orbiting a neighboring star. Engineers working on these future missions are already citing Epsilon Indi Ab as proof that the underlying approach works and deserves further investment.

Conclusion: a landmark moment for modern astronomy

A confirmation of the Webb telescope's power

The discovery of Epsilon Indi Ab once again confirms the exceptional power of the James Webb Space Telescope, capable not only of detecting distant exoplanets, but also of revealing their atmospheric composition with a level of detail never achieved before.

This technical feat fits into a long series of discoveries made by this telescope since it entered service, each one pushing back a little further the limits of what humanity can observe and understand about the universe around it.

The considerable cost and technical complexity of the James Webb telescope find yet another concrete justification here, since the scientific payoff of this kind of discovery goes far beyond simple astronomical curiosity. Every image like this one strengthens the case for continued public investment in large-scale space observatories.

What to take away from this breakthrough

Above all, remember that this discovery illustrates the shift from a largely indirect astronomy to an increasingly direct one, where exoplanets are no longer just light curves interpreted by algorithms, but genuine images accompanied by detailed chemical analyses.

This methodological shift promises to profoundly transform our understanding of distant planetary systems in the years ahead, as new targets are identified and observed using this same approach, one distant world at a time.

For the general public as much as for the scientific community, this discovery is a reminder that the exploration of our galaxy is probably only just beginning, with every new direct image of an exoplanet opening the window a little wider onto the unsuspected diversity of the worlds scattered around us, waiting to be seen.

By Maxime Marquette, columnist

Sources

Primary sources

Max Planck Institute for Astronomy — Official site — 2026

NASA Science — James Webb Space Telescope mission — 2026

ESA Webb — Official mission site — 2026

Secondary sources

Futura Sciences — The James Webb telescope discovered another Jupiter 12 light-years away — May 2026

The Extrasolar Planets Encyclopaedia — Exoplanet database — 2026

National Geographic France — Space section — 2026