About 4.5 billion years ago, Earth had a violent neighbor. A young, still-forming planet named Theia slammed into our world with enough force to melt vast portions of its mantle and scatter a huge ...
Key Findings The moon once dismissed as the solar system's most hostile environment may now sit directly in the path of an ...
I/ATLAS is a rare visitor from outer space that has captured the attention of astronomers since its discovery in July 2025.