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Gaia Mission Unveils Hundreds of Asteroid Moons, Reshaping Solar System Understanding

Gaia Mission Unveils Hundreds of Asteroid Moons, Reshaping Solar System Understanding

European Space Agency Discovers Hundreds of Potential Asteroid Moons

The European Space Agency’s (ESA) Gaia mission has made a groundbreaking discovery, identifying hundreds of potential moons orbiting more than 350 previously unknown asteroids in our solar system. This finding, detailed in a new study published in the journal Astronomy & Astrophysics, offers significant insights into the formation and evolution of our cosmic neighborhood.

The study reveals the presence of binary asteroids, which consist of two space rocks orbiting a common center. Lead author Luana Liberato emphasized the difficulty of detecting these binary systems, stating, “Due to their small size and distance, only 500 of the million known asteroids are confirmed to be in binary systems.”

Researchers utilized data from the ESA’s Gaia space telescope to observe “wobbles” in asteroid orbits, indicating the presence of tiny moons. The team analyzed information from Gaia’s Data Release 3, published in 2022, with the next release expected in 2026.

These binary asteroids are of particular interest to scientists as they provide valuable information about how space rocks interact and collide. Composed of material from the early solar system, asteroids offer a unique glimpse into our cosmic past.

Building on this discovery, the ESA plans to launch the Hera mission later this year. This mission will visit the binary asteroid Didymos and its moon Dimorphos, following NASA’s Double Asteroid Redirection Test (DART) that impacted Dimorphos in 2022.

As researchers continue to analyze the data, the discovery suggests that many more asteroid moons are waiting to be found, potentially revolutionizing our understanding of the solar system’s small bodies.

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