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New Insights on Nereida's Origins from James Webb Telescope Data

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Recent analysis using data from the James Webb Space Telescope suggests that Nereida, Neptune's third-largest moon, may be the last intact remnant of an ancient group of moons that were destroyed early in the solar system's history. Unlike the orderly moon systems of other giant planets, Neptune's moons are chaotic, with Triton being the largest and orbiting in the opposite direction. The study indicates that Nereida's composition does not align with known Kuiper Belt objects, challenging previous assumptions about its origin. This research could reshape our understanding of Neptune's moon system and the dynamics involved during its formation.

Key Details: • Nereida has a diameter of approximately 210 miles (338 kilometers). • It takes 360 Earth days for Nereida to complete an orbit around Neptune. • The study was published in Science Advances on Wednesday. • James Webb's observations revealed Nereida has a surface rich in water and CO2.

astronomy space james-webb neptune moons

People & Organizations

NASACalifornia Institute of TechnologyKuiper BeltMatthew BelyakovNeptune

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