Editorial NexoScience
For almost twelve years, four different telescopes had already photographed the same tiny point of light next to Beta Pictoris, and nobody had realized what it was. An international team of more than 90 astronomers has now confirmed it: a third giant planet orbiting one of the most closely watched stars beyond our solar system.
Beta Pictoris sits about 64 light years from Earth and is barely 23 million years old, a toddler by stellar standards. It already hosts two known planets, Beta Pictoris b and Beta Pictoris c, discovered in 2008 and 2019 respectively, plus a huge debris disk of dust and rock seen edge on from Earth. The new object, named Beta Pictoris d, is the third confirmed planet in the system and one of the lightest ever photographed directly from the ground.
The trick was patience, not a new telescope. Researchers first detected Beta Pictoris d in December 2025 using the ERIS instrument on the Very Large Telescope in Chile. Instead of stopping there, they combed through eleven years of archival images from the James Webb Space Telescope and another VLT instrument called SPHERE, and found the same faint dot hiding in five earlier observations, the oldest dating back to December 2014.
That eleven year trail is what makes the discovery solid. A single photograph of a faint dot near a star proves almost nothing, since a background star or galaxy can appear in roughly the same spot by pure chance. Astronomers ruled that out by tracking how the dot moved over time. A stationary background object would have drifted across the sky in a specific, predictable way as Beta Pictoris itself moves. Instead, the dot moved together with the star along an orbit, deviating from that expected background path by more than 24 standard deviations, a level of certainty that leaves essentially no room for coincidence.
The planet had been hiding in plain sight for a decade. So why had nobody spotted it before 2025? Because for most of that time it was either too close to its blinding host star to be seen, or hidden right next to Beta Pictoris b, a planet up to 100 times brighter at some wavelengths. In the 2014 image, the two planets appear almost on top of each other from Earth. Researchers only recovered Beta Pictoris d in that old data after digitally subtracting planet b from the picture first.
The new planet turns out to have roughly 2.4 times the mass of Jupiter, with a surface temperature around 600 degrees Kelvin (327 degrees Celsius), cooler than the two inner planets. It orbits at about 26 times the distance between the Sun and Earth, farther out than both Beta Pictoris b and c, and takes an estimated 91 years to complete one lap around its star. Its orbit lies in the same plane as the other two planets, which fits neatly with a long standing puzzle about the system: astronomers had long suspected some object beyond Beta Pictoris b was carving out the inner edge of the debris disk, and this planet’s position and estimated mass match that role convincingly.
Its color gives away an atmosphere loaded with metals. The planet’s brightness pattern across different infrared filters also stands out. Its colors closely match those of 51 Eridani b, another young exoplanet of similar age, and point to strong carbon dioxide absorption in its atmosphere, a sign of higher metal content than the free floating, planet sized objects that drift through space without a host star. That chemical fingerprint reinforces that Beta Pictoris d formed as a genuine planet inside a disk of material, not as a failed star born in isolation.
The discovery confirms that even well studied systems still have planets left to find. Beta Pictoris becomes only the second directly imaged planetary system, after the famous HR 8799, to have three or more confirmed planets. The authors note that other well studied systems likely hide similarly faint, wide orbit companions that current instruments simply have not had enough time, or enough archival depth, to confirm. A separate, independent study using spectroscopy from the James Webb Space Telescope detected the same planet on its own and arrived at similar mass and temperature estimates around the same time, reinforcing confidence in the result.
The discovery of Beta Pictoris d is described in “Direct Imaging Discovery of Giant Exoplanet Beta Pictoris d: A Decade-long Game of Hide-and-Seek,” led by Ben J. Sutlieff (University of Edinburgh) and Markus J. Bonse (European Southern Observatory), published July 15, 2026 in The Astrophysical Journal Letters. DOI: 10.3847/2041-8213/ae80a0.
