James Webb Telescope Uncovers New Evidence of Cosmic Collisions—and One of Them May Have Created Our Moon

• James Webb Telescope has uncovered evidence of extreme debris disks around young stars, revealing patterns that suggest planetary-scale collisions. The team found three main characteristics: very fine dust grains smaller than usual, higher concentrations of warm dust, and irregular variations in infrared brightness. These features indicate large volumes of material in the disks, which are not visible in optical wavelengths.
• Observations of 21 disks showed that about one-third contained silica, suggesting energetic collisions similar to the Theia hypothesis, which proposes an ancient impact event that may have created the Moon. The remaining disks were silica-poor, indicating less energetic events. The team says they cannot study these planetary embryos directly because they are too small.
• The findings may help understand how rocky planets formed and how giant planets evolved in the early stages of planetary systems. The research also highlights the importance of the timeframe in question, which corresponds to the formation of terrestrial planets within the first few hundred million years of a system’s existence.

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