The discovery of new planets in distant galaxies has been one of the most exciting achievements in modern astronomy. With advanced technology such as space telescopes and space exploration missions, scientists are now able to identify exoplanets located thousands of light years from Earth. This discovery reveals the potential for life beyond our planet and expands our understanding of the creation of the universe. One of the main methods for detecting these planets is the transit technique. This method observes the decrease in starlight when a planet passes in front of the star. This data is then processed using complex algorithms to determine the size, mass and distance of the planet from its host star. Telescopes such as Kepler and TESS (Transiting Exoplanet Survey Satellite) have successfully discovered thousands of exoplanets using this technique. Newly discovered planets are often in the habitable zone, which is the area where temperatures allow liquid water to exist. The discovery of a planet in the habitable zone is of great interest to scientists, because water is a basic element necessary for life as we know it. Meanwhile, the atmospheric characteristics, composition and environmental conditions of the planet are also the focus of research. Further studies were carried out using spectroscopy to analyze the planet’s atmosphere. This technique allows researchers to identify gases such as oxygen, methane and carbon dioxide that can show signs of life. This data also provides clues about the possible presence of microorganisms or other life forms. Not only that, the discovery of this new planet also helps answer fundamental questions about the origins of our own solar system. By comparing the characteristics of planets in space with those of our system, scientists can better understand how planets form and their evolution over time. One of the latest discoveries, planet TOI-700 d, is a medium-sized planet located in the habitable zone of an M-type star. This research shows that these small stars have the potential to have life-rich planetary systems. This finding is good news for astronomers who continue to try to explore locations outside our solar system. In the next few years, new missions such as the James Webb Space Telescope (JWST) are expected to provide deeper insights into the structure and composition of exoplanet atmospheres. With its ability to detect infrared light, JWST has the potential to find clues about organic molecules and signs of biological activity. The discovery of a new planet in a distant galaxy is not just a scientific achievement, it has also inspired many people to reflect on our place in the universe. Exploring the possibility that we are not alone in the cosmos adds a new dimension to our quest for knowledge and understanding. In this context, every new discovery can be a window into a world we have never seen before, opening up hope and imagination for future generations.