NASA says the James Webb Space Telescope provides a “crash course” on planet-shattering collisions that shaped the early solar system. Scientists theorize that about 4.5 billion years ago, a Mars-sized body named Theia struck the young Earth. The impact is believed to vaporize large amounts of rock and eject debris into space.
Over time, some of that expelled material is thought to gather and form the Moon. The outlets also connect the research to NASA’s broader space plans, noting that Artemis—aimed at returning humans to the Moon—builds on this understanding of lunar origins. NASA frames the findings as part of a continuing effort to interpret how Earth and the Moon formed from catastrophic events, while the reporting elsewhere largely repeats the same background scenario.
The two sources align on the same core explanation: a Theia impact, extreme heating and ejection, and Moon formation from accreted debris, with Webb observations presented as helping inform that scientific picture.
