While it is theoretically possible for aliens to send probes into our solar system without our immediate detection, it is highly unlikely given our current level of technological advancements. Here are a few reasons why:
Detection capabilities: We have developed various technologies and instruments to monitor and observe objects within our solar system. Astronomical observatories, space telescopes, and radar systems are constantly scanning the skies, actively searching for celestial objects, including asteroids, comets, and other potential threats. These detection systems would likely identify any incoming probes or spacecraft.
Communication and data transmission: If alien probes were to enter our solar system, it is probable that they would be engaged in some form of communication or data transmission with their point of origin. Our sophisticated radio telescopes are capable of detecting and analyzing signals from distant sources, making it difficult for alien probes to remain unnoticed during their journey.
Tracking technology: Once an object enters our solar system, astronomers and scientists can track and monitor its trajectory. They can calculate its speed, direction, and other properties using advanced tracking systems. Even small deviations in the expected orbits of celestial bodies can be detected, allowing us to identify foreign objects in our vicinity.
Unintended effects: Alien probes entering our solar system would likely interact with various physical phenomena, such as gravitational forces from the Sun and other celestial bodies. These interactions could cause detectable disturbances in the orbits and trajectories of other known objects in our solar system, drawing attention to the presence of the alien probes.
Space agencies and collaborations: The international space community, including space agencies and organizations, collaborates and shares information regarding celestial observations. Any unusual or unidentified objects detected within our solar system would likely be communicated and investigated collectively.
It is important to note that our understanding of the universe is limited by our current technological capabilities. While it is possible that highly advanced extraterrestrial civilizations could possess technology that allows them to remain undetected, it would require a level of advancement far beyond our own. However, until concrete evidence is presented, the existence of alien probes in our solar system remains speculative.