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Exploring the Youngest Exoplanet: Elias 2-24b
How are planets born and how do they grow? This fundamental question in astronomy has researchers turning their gaze towards “young planets.” In a universe where all the planets in our solar system are approximately 4.6 billion years old, the search for newly formed exoplanets poses a unique challenge.
The Hunt for Young Planets
Despite the fact that most of the 6,000 exoplanets discovered so far are also billions of years old, astronomers are determined to find younger celestial bodies. The transit method, a common technique where astronomers can detect a slight dimming of a star’s light as a planet passes in front of it, often helps in locating older planets.
The Discovery of Elias 2-24b
Newly formed exoplanets are often obscured within protoplanetary disks—residual structures from planet formation made of gas and dust. Spotting such nascent planets is no easy task, which is why the recent discovery of Elias 2-24b stands out as a monumental achievement.
A team led by Andrea Bernardi from Universidad Diego Portales in Chile focused on protoplanetary disks with significant voids in their dense material—a possible indicator of growing planets. By reanalyzing data from the central star being occluded, they identified Elias 2-24b.
A Breakthrough in Understanding Planetary Formation
Elias 2-24b, located approximately 450 light-years from Earth, orbits its star at a distance of 55 astronomical units. With an estimated mass ranging from 1.9 to 4.0 times that of Jupiter, it is believed to be significantly smaller in volume. Given that its host star is less than 1 million years old, Elias 2-24b is considered to be an incredibly young exoplanet.
Setting New Records in Exoplanetary Exploration
Previous observations confirmed young exoplanets orbiting stars over 5 million years old. Yet, the discovery of Elias 2-24b pushes the boundaries of our knowledge, marking a significant breakthrough in our understanding of exoplanetary systems.
For more details on this groundbreaking discovery, check out the full study here from Universidad Diego Portales in Chile.
Source: www.wired.com
