Astronomers have identified a third planet, Beta Pictoris d, orbiting the young star Beta Pictoris, located 63 light-years away in the constellation Pictor. According to the European Southern Observatory (ESO), this newly confirmed world is the faintest planet ever directly imaged from Earth, discovered by analyzing archival data using the Very Large Telescope (VLT) in Chile.
How Astronomers Found the Hidden Planet
The discovery of Beta Pictoris d was serendipitous. A research team including Ben Sutlieff of the University of Edinburgh was originally observing the star system to monitor changes in the previously known planet, Beta Pictoris b. During the analysis, co-author Markus Bonse of the ESO noticed an anomaly in the data. Rather than requiring new observations, the team confirmed the planet’s existence by reviewing 11 years of archival imagery from the SPHERE instrument and the Webb space telescope.
As co-author Jayne Birkby of the University of Oxford noted, the planet had been “playing a game of hide-and-seek” for over a decade. The results were published in The Astrophysical Journal Letters on July 15, 2026.
Did you know?
Beta Pictoris d is the third planet discovered in this system. It joins Beta Pictoris b and Beta Pictoris c, both of which are gas giants roughly 10 times the mass of Jupiter.
Comparing Beta Pictoris d to Known Exoplanets
Beta Pictoris d is physically distinct from its siblings in the system. While the two previously known planets are massive gas giants, the new planet is only 2.4 times the mass of Jupiter. Its greater distance from the host star results in a colder, fainter profile, which explains why it remained undetected in earlier surveys.
This discovery places Beta Pictoris in an elite category. It is only the second star system—the other being HR 8799—where more than two planets have been successfully imaged directly. According to Sutlieff, these multi-planet systems are considered the “holy grails” of discoveries, as they provide a unique laboratory to study how different planets evolve within the same formation environment.
Solving the Debris Disk Mystery
The presence of Beta Pictoris d provides a long-sought explanation for the structure of the star’s debris disk. Astronomers have previously struggled to explain the specific shape of the material surrounding the star, which dates back to the system’s formation roughly 20 million years ago. Researchers now state that the mass and orbital position of Beta Pictoris d perfectly account for the observed distortions in this disk of leftover dust and asteroids.
Pro Tip: The Power of Archival Data
The success of the Beta Pictoris team highlights the importance of re-examining existing telescope archives. As imaging technology improves, researchers are increasingly able to tease out faint signals from older data, suggesting that many more worlds may be hiding in plain sight within current observatory records.
Frequently Asked Questions
How far away is the Beta Pictoris system?
Beta Pictoris is located 63 light-years from Earth in the southern constellation Pictor.
Why was this planet so hard to see?
Beta Pictoris d is 100 times fainter than its neighbor, Beta Pictoris b. Its smaller mass and greater distance from the star make it significantly dimmer, requiring advanced processing of long-term archival data to confirm.
What type of planet is Beta Pictoris d?
It is classified as a gas giant with approximately 2.4 times the mass of Jupiter.
How many planets have been imaged at Beta Pictoris?
Astronomers have now directly imaged three planets in the system: Beta Pictoris b, c, and the newly discovered d.
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