The likelihood of finding an identical planet to Earth, with no humans or any other forms of life, is currently unknown. While the vastness of the universe suggests that there could be planets similar to Earth, the exact conditions necessary for supporting complex life like ours are still not well understood.
Several factors contribute to the unique habitability of Earth, including its distance from the Sun, its composition, atmosphere, magnetic field, and the presence of liquid water. While the discovery of exoplanets (planets outside our solar system) has been increasing, determining the precise conditions on these distant planets is challenging.
The search for habitable exoplanets focuses on identifying planets within the "habitable zone" around their star, where conditions might allow for the presence of liquid water. However, the presence of liquid water alone does not guarantee the existence of life as we know it. Other factors, such as atmospheric composition and the planet's geological activity, also play crucial roles.
Considering the vast number of planets in the universe, it is conceivable that some might possess similar conditions to Earth. However, finding an exact replica of our planet, devoid of any life or human presence, would require extensive exploration and detailed analysis of countless planetary systems.
As scientific knowledge and technology continue to advance, our understanding of exoplanets and the potential for life beyond Earth will improve. Ongoing missions, such as the Kepler and TESS space telescopes, are dedicated to discovering and characterizing exoplanets, providing valuable data to scientists.