Grok:
The interstellar comet 3I/ATLAS poses no threat to Earth. Its closest approach to our planet will be approximately 1.8 astronomical units (about 270 million kilometers or 170 million miles) on December 19, 2025, which is a safe distance. The comet follows a hyperbolic trajectory, meaning it is not gravitationally bound to the Sun and will pass through the solar system without coming dangerously close to Earth. It will approach Mars more closely (0.19 AU, or 28 million kilometers) on October 3, 2025, and reach its closest point to the Sun (1.4 AU, or 210 million kilometers) around October......