太阳系观测到第三个“星际访客”，马斯克称若握外星人证据，将在节目公开

Group 1 - The core viewpoint of the article revolves around Elon Musk's comments on the newly discovered interstellar object 3I/ATLAS and the implications of its potential extraterrestrial origins [1][3][4] Group 2 - The interstellar object 3I/ATLAS was first observed by astronomers in July, with an estimated diameter between 440 meters and 5.6 kilometers, traveling at a speed exceeding 200,000 kilometers per hour [3] - The trajectory and material composition of 3I/ATLAS differ from previously observed comets, leading to speculation about its "non-natural origin," with Harvard astronomer Avi Loeb suggesting it could be a "mothership" sent by an alien civilization [3] - Musk acknowledged the presence of nickel in the gas cloud surrounding 3I/ATLAS, noting that many comets and asteroids are primarily composed of nickel, and highlighted the potential catastrophic consequences if such a massive object were to collide with Earth [3][4]