The discovery of an Earth-like planet in a distant galaxy is a major highlight in the world of astronomy. With advances in technology and observation methods, scientists can now detect exoplanets that have conditions similar to our planet. Some of the main methodologies in this search include transit techniques, radiation velocities, and direct observations. One of the most significant discoveries is the planet K2-18b, located about 124 light years from Earth. Research shows that the planet is in the habitable zone, where liquid water can exist. This discovery gives hope for the possibility of life outside Earth. In further observations, the presence of methane gas and a number of organic compounds in K2-18b’s atmosphere added to its attractiveness as a research target. Furthermore, TESS (Transiting Exoplanet Survey Satellite) played an important role in discovering more Earth-like planets. These satellites monitor thousands of stars, looking for dips in light produced when planets move in front of them. Although many planets have been discovered, only a few have similar characteristics to Earth. Planet TOI-700 d also attracts attention. This planet has a size and mass close to Earth and is located in the habitable zone of an M dwarf star. The availability of liquid water on this planet makes it an attractive candidate for further research. The discovery of TOI-700 d also suggests that many more exoplanets may yet be detected around dwarf stars. In addition to the search for exoplanets, the use of advanced telescopes such as the James Webb Space Telescope (JWST) will further deepen our understanding of these distant planets. JWST has the ability to analyze planetary atmospheres directly, checking for signs of life. For example, the presence of oxygen and methane in balanced conditions can be a biological indicator. These discoveries are not only important from a scientific aspect, but also often raise big questions about the existence of life outside Earth. Many scientists believe that discoveries of Earth-like planets will continue to increase, and some of them may have very favorable conditions for life. By learning more about these planets, we can gain new insights into planet formation, the evolution of life, and conditions beyond Earth. The existence of Earth-like planets in distant galaxies helps us understand that we are not alone in this vast universe. The development of observation methods is increasingly being optimized to cover longer distances, giving hope for more exciting discoveries in the future. Additionally, international collaboration in astronomical research is essential. By sharing data and resources, researchers from different countries can work together to identify new exoplanets. A unified scientific community is helping to create a better understanding of the potential existence of life beyond our galaxy. Despite the many challenges that must be faced, the impact of the discovery of this Earth-like planet goes far beyond just science. This discovery opens up new horizons, inspires young people to pursue careers in STEM fields, and fosters curiosity about the universe. Ongoing research on this topic will continue to fuel further interest and research in the coming decades.