A new study published in *Nature* reveals the interstellar comet 3I/ATLAS likely formed 12 billion years ago, dating back to the early universe. Researchers analyzed the comet’s unique chemical composition using data from the James Webb Space Telescope and the Atacama Large Millimeter/submillimeter Array (ALMA) observatory. The findings provide insights into the building blocks of planetary systems in the universe’s nascent stages. The comet’s composition differs significantly from comets originating within our solar system, suggesting it formed in an environment with different chemical conditions. Scientists believe the analysis offers a rare glimpse into the materials present shortly after the Big Bang. Further research will focus on comparing 3I/ATLAS to other interstellar objects to refine understanding of early planetary formation. This discovery highlights the power of advanced telescopes in unraveling the mysteries of the cosmos.