Baby Planet Alert! Scientists Just Found the Youngest World Ever Discovered
Quick Summary
Astronomers have confirmed the youngest planet ever found. It is called Elias 2-24 b and it is less than one million years old. That sounds old — but in space, it’s a newborn! The discovery is shaking up everything scientists thought they knew about how planets form.
What Happened?
Our own solar system is about 4.6 billion years old. Earth itself has been around for about 4.5 billion years. So when scientists say they found a planet that is less than one million years old, they are talking about something incredibly fresh.
Elias 2-24 b is the official name of this baby planet. It was confirmed in a paper published in The Astrophysical Journal Letters — one of the most respected science journals in the world. The research was led by Andrea Bernardi, a young doctoral student in Chile.
The planet is about the same size as Jupiter, our solar system’s biggest planet. Jupiter is so big that about 1,300 Earths could fit inside it. So Elias 2-24 b is enormous — even as a newborn.
The planet is still wrapped in the cloud of gas and dust it formed from. Scientists call this a “protoplanetary disk” — basically, the planet’s birth blanket, still wrapped tightly around it.
Elias 2-24 b orbits a young star located about 450 light-years away from Earth. That star sits inside a region called the Rho Ophiuchi cloud complex — a giant stellar nursery where new stars and planets are being born all the time.
Astronomers first spotted a gap in the star’s dusty disk about a decade ago using the ALMA telescope in Chile. That gap was a clue that something — maybe a planet — was carving through the dust. Then a telescope at the European Southern Observatory spotted a faint dot inside the gap. It took years of observations using the Keck Observatory in Hawaii to finally confirm: yes, that dot is a real planet.
Here’s the really puzzling part. Scientists’ best models say a Jupiter-sized planet should take around 5 million years to form. Elias 2-24 b did it in less than 1 million years. That’s like finishing a 10-year school project in less than 2 years.
Why Does It Matter?
Every planet you can see in the night sky — including Earth — went through a process like this billions of years ago. By finding a planet that is still being born, scientists get a rare “live” look at planetary creation. It’s like finding footage of something that happened before cameras existed.
The discovery also means our current models of planet formation are incomplete. Scientists will now need to rethink the rules — and that kind of puzzle is exactly what makes science exciting.
Big Words
- Protoplanetary disk — the swirling ring of gas and dust around a young star where planets form; think of it like the dough before a pizza is baked
- Exoplanet — any planet that orbits a star outside our own solar system
- Confirmed — officially proven to be true after careful checking with multiple observations and tests
- Light-year — the distance light travels in one year — about 9.5 trillion kilometers; it’s a way to measure huge distances in space
- Stellar nursery — a region of space filled with gas and dust where new stars and planets are being born
Fun Fact
Elias 2-24 b is more than five times farther from its star than Neptune is from our Sun. Our Neptune is already so far away that sunlight takes about 4 hours to reach it — so Elias 2-24 b is in very deep, cold, distant space!
Think About It
If scientists can watch a planet being born right now, what do you think they could learn about how our own Earth formed 4.5 billion years ago?
Sources
- NASA Science — Newfound ‘Baby’ Planet Smashes Record for Youngest Known World
- ScienceDaily — Astronomers just found the youngest known planet ever (Sep. 17, 2026)
- Gizmodo — Astronomers Just Found the Youngest Planet Ever Seen. It Shouldn’t Be So Huge (Sep. 18, 2026)
- The Astrophysical Journal Letters — Bernardi et al., 2026, DOI: 10.3847/2041-8213/ae9bb6