Astronomers Confirm Discovery of the Youngest Known Exoplanet Ever
Astronomers have confirmed the discovery of Elias 2-24b, the youngest exoplanet ever identified. By analyzing coronagraph data and observing gaps in protoplanetary disks, researchers verified the object is gravitationally bound to its host star.
Why it matters
This discovery provides critical insights into the early stages of planetary formation and the evolution of solar systems.
Still, the vast majority of the approximately 6,000 exoplanets confirmed to date are also billions of years old. That’s not because there aren’t youthful planets out there, but old planets are easier to discover using common techniques such as the transit method, in which astronomers detect the slight dimming of a star’s light as a planet passes in front of it.
Newly formed exoplanets are often buried within disks of gas and dust, the leftover building blocks from a planet's formation, also known as a protoplanetary disk. The difficulty of just locating such a new celestial body is part of what makes the discovery of the exoplanet Elias 2-24b—now the youngest ever confirmed—so exciting.
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