Evaluation and Demonstration of the Principle and Results for Different Planet Searching and Detection Schemes

As a matter of fact, exoplanets searching are crucial for human beings for not only searching for new habitats but also for understanding of celestial evolution. In retrospect, the field of exoplanet detection officially initiated in 1992, when the first exoplanet was confirmed to be discovered. Since then, exoplanet searching and detection has become the forefront of astrophysics, allowing scholars to gain information on the life cycle of planetary systems and possibly discover the existence of habitable planet exhibiting signs life form. On this basis, in this article three of the methods will be discussed, including radial velocity, transit photometry, and gravitational microlensing. To be specific, the fundamental principles of which will be explained as well as the state-of-art results will be demonstrated. According to the analysis, the drawbacks or limitations and possible future directions for them will be presented at the same time. Overall, these results offer a guideline for exoplanet searching based on the advanced facilities.