Astronomers just confirmed a newborn world, Elias 2-24 b, that is not even a million years old—and it may force a rewrite of how fast giant planets form.
Story Snapshot
- NASA reports Elias 2-24 b as the youngest known planet, under one million years old.
- The planet is about Jupiter’s size and still sits inside its birth disk of dust and gas.
- Researchers used archival and ground-based images to lock the find.
- The speed of its birth challenges slow-and-steady planet formation timelines.
A record-setter still inside the cradle
NASA announced that Elias 2-24 b is now the youngest known planet, with an age under one million years. The planet orbits a very young star wrapped in a thick disk of dust and gas. That disk is the nursery where planets take shape. The team identified a bright point that moves with the star and sits inside the disk. That behavior matches a newborn giant planet, not a background object or a small dusty clump.
The new world appears to be close to Jupiter’s mass and still glows from the heat of formation. Its star sits a few hundred light-years away in a busy star-forming region of the Milky Way. The system’s disk shows rings and gaps, which many astronomers see as footprints of newly forming planets carving paths as they grow. Prior studies of the same disk saw these structures and flagged the site as a likely planet nursery.
How astronomers pinned it down
The confirmation leaned on high-contrast imaging, coronagraphy, and careful checks against older images stored in NASA-funded archives. Coronagraphs block a star’s glare so faint worlds nearby can be seen. The team compared positions across years to make sure the point of light is bound to the star. That test is key. If the object were a distant background source, it would drift differently as the star moves. The shared motion here points to a real companion.
W. M. Keck Observatory data, collected with instruments developed with NASA partners, gave the clarity needed to separate the planet’s glow from the messy disk around it. Direct imaging of brand-new planets is hard because the disk is bright and chaotic. But when the location, motion, and disk structure all align, the case grows strong. This is what pushed Elias 2-24 b from “candidate” toward “confirmed” status in the eyes of the team and NASA’s public science arm.
Why this birth speed matters
Giant planets like Jupiter were long thought to need several million years to build up from pebbles and gas. Elias 2-24 b looks fully formed far faster. That supports models where gas giants can collapse quickly once a core or dense clump forms in the disk. The find adds a rare, direct snapshot of a planet still in its nursery, which helps test how disks feed young giants and how fast those giants carve out gaps and rings.
Fast formation aligns with trends seen in high-resolution disk images from large radio arrays and ground telescopes. Those pictures show rings and lanes that hint at rapid planet growth and migration. A 2017 study of the same star’s disk mapped three concentric gaps, a classic signal of ongoing planet formation. Putting a confirmed giant right inside that maze strengthens the link between those disk features and real worlds.
What comes next for this “baby” world
Follow-up work will aim to read the young planet’s light and heat more clearly. Spectra could reveal what its atmosphere holds, how cloudy it is, and how hot it still runs after birth. Better time-series imaging will pin down its orbit and help estimate its true mass. As more epochs stack up, astronomers can test whether the planet is shaping nearby dust into a ring or shepherding material into a moon-forming mini-disk around itself.
BREAKING 🚨: Astronomers have found the youngest planet ever discovered
It's less than a million years old, called Elias 2-24 b pic.twitter.com/7cK9rGtoPk
— Latest in space (@latestinspace) September 17, 2026
Expect more claims like this as teams mine archives and pair them with new images. Planet nurseries are busy places, and direct imaging is finally good enough to pick out newborn worlds in the glare. Each confirmed case shrinks guesswork and builds a shared age scale. Elias 2-24 b now sets the pace. If a Jupiter-size planet can take shape this fast, models must match that clock—or be left behind by the data.
Sources:
sciencedaily.com, milenioyems.cl
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