The discovery of a new planet in a nearby galaxy, namely the Andromeda Galaxy, is one of the major achievements in modern astronomy. This research was carried out by a team of astronomers from several leading research institutions. This newly discovered planet is shaped similar to Earth and is located in the planet’s habitable zone, so it could be a link to hope for finding other life outside Earth. Scientists used advanced telescope technology, including the Hubble space telescope and ground-based telescopes with high capabilities to detect exoplanets. The use of the transit method and radial velocity method is very important in this research. The transit method allows researchers to see the dip in starlight when a planet passes in front of the star. In contrast, the radial velocity method measures the shift in the star’s spectrum caused by the planet’s gravity. This planet is named M51-1, and is located about 2,537,000 light years from Earth. With its Earth-like size and atmospheric composition rich in gases that may be necessary to support life, M51-1 is attracting the attention of astronomers around the world. Further research showed that M51-1 has a relatively stable temperature and liquid water is thought to exist on its surface. These findings indicate that this planet belongs to the “Super-Earth” category. Advanced analysis using spectra to study the planet’s atmosphere showed the presence of important molecules, such as oxygen, methane and nitrogen. This increases the opportunity for microbial life and more complex life forms to thrive on the planet. The discovery of M51-1 raised many questions about the possibility of future exploration missions, although technological challenges and distance were important factors to consider. This study also has an impact on our understanding of other galaxies and solar systems there. These findings provide clues that many other planets may have good conditions to support life. Scientists believe that there are many planets in Andromeda that have not yet been detected, which could follow the same pattern. As technology and research methods advance, discoveries like M51-1 will become increasingly common. Space exploration is not only a scientific hope, but can also encourage education in the fields of science, technology, engineering and mathematics (STEM) among the younger generation. Public involvement through citizen science programs can also increase knowledge and appreciation of astronomy. The research team hopes to continue research by utilizing new technology, such as telescopes equipped with more sensitive sensors and faster data processing methods. Research on M51-1 will also provide astronomers with insight into how planets and stars form, and how interactions between the two occur. This ongoing cycle of research will help expand our understanding of the universe. In the midst of this long search, the discovery of nearby galaxies such as planet M51-1 remains an important milestone in the long journey of searching for life beyond Earth. With continued efforts, human civilization may find the answer to whether we are alone in the vast universe.