Core Viewpoint - An unidentified object, possibly from another star system, has been detected in the solar system, marking it as the third known "interstellar visitor" [1][2] Group 1: Object Characteristics - The object, designated A11pI3Z, is located between the asteroid belt and Jupiter, several hundred million kilometers from Earth [1] - Its exact nature remains uncertain; researchers are unable to determine if it is a rocky asteroid or a comet composed of rock, ice, and dust [2] - The estimated width of A11pI3Z is around 40 kilometers according to Spanish astrophysicist Josép Trigo Rodríguez, while Harvard astrophysicist Avi Loeb suggests it could be about 19 kilometers wide [2] Group 2: Comparison with Previous Interstellar Visitors - The first known interstellar visitor, 'Oumuamua', discovered in October 2017, is a cigar-shaped object approximately 400 meters long [2] - If A11pI3Z is confirmed to be 19 kilometers wide, its mass would be 10 million times that of 'Oumuamua' [2] - The second interstellar visitor, 21/Borisov, discovered in 2019, is identified as a comet [2]

Core Viewpoint - An unidentified object, potentially an interstellar visitor, has garnered attention from astronomers worldwide, being the third known object to visit the solar system from outside [1][2]. Group 1 - The object, designated A11pI3Z, is currently located between the asteroid belt and Jupiter, several hundred million kilometers from Earth, and poses no collision threat to Earth [1]. - Researchers are uncertain whether A11pI3Z is a rocky asteroid or a comet composed of rock, ice, and dust, and its shape and size remain unknown [2]. - The object's unique trajectory and high speed suggest it may originate from an external star system, with estimates of its width around 40 kilometers [2]. Group 2 - Comparatively, the first known interstellar visitor, 'Oumuamua', discovered in October 2017, is approximately 400 meters long, while A11pI3Z could be significantly larger, with a mass potentially 10 million times that of 'Oumuamua' if its width is confirmed to be 19 kilometers [2]. - The second known interstellar visitor, 21/Borisov, discovered in 2019, is identified as a comet [2].

Group 1 - The unidentified object, designated A11pI3Z, is potentially the third "interstellar visitor" known to have entered the solar system, as reported by the European Space Agency [1] - A11pI3Z is currently located between the asteroid belt and Jupiter, several hundred million kilometers from Earth, and poses no threat of collision with Earth [1] - Researchers are uncertain whether A11pI3Z is a rocky asteroid or a comet composed of rock, ice, and dust, and its shape and size remain unknown [2] Group 2 - The trajectory and high speed of A11pI3Z suggest it may originate from outside the solar system, with estimates of its width ranging from approximately 19 kilometers to 40 kilometers [2] - If A11pI3Z is confirmed to be 19 kilometers wide, its mass would be 10 million times that of the first known interstellar visitor, 'Oumuamua', which is about 400 meters long [2] - The second known interstellar visitor, 21/Borisov, discovered in 2019, is identified as a comet [2]