The discovery of a new planet in a distant galaxy is one of the significant achievements in astronomy and space science. With advances in telescope and observation technology, scientists have succeeded in identifying various planets located outside our solar system. These planets, known as exoplanets, provide valuable insight into the possibility of life beyond Earth. One of the main methods used to discover exoplanets is the transit method. In this method, astronomers observe the decrease in light from a star when a planet passes in front of the star. By analyzing the light patterns, researchers can determine the size and distance of the planet from its star. Planets located in the habitable zone, known as the Goldilocks zone, have the best potential to support life. One of the latest discoveries comes from the 30th space telescope launched by a leading space organization. This telescope succeeded in detecting an Earth-sized planet in a galaxy more than 500 light years from Earth. The planet, called Kepler-452b, revolves around a Sun-like star and has temperatures that support the existence of liquid water. In addition, astronomers have also discovered several gas giant planets such as WASP-121b, which have extreme atmospheres. Research shows that the planet’s atmosphere contains sodium and potassium at levels higher than atmospheric patterns on Earth. These observations provide clues about the atmospheric diversity and chemical composition of other planets. With research budgets continuing to increase, future galaxy mapping is expected to reveal many more new planets. This discovery not only attracted scientific attention but also increased public enthusiasm about the possibility of life in outer space. The concept that we may not be alone in the universe is increasingly moving many researchers to explore aspects such as planetary habitability. Telescopes such as Hubble and James Webb played an important role in this exploration. They enable more detailed analysis of a planet’s atmosphere and spectral information that facilitates a better understanding of conditions on the planet. Each new discovery adds data and strengthens theories regarding planet formation and gravitational forces in different galaxies. Interdisciplinary approaches also occur in the field of astronomy, combining astrobiology, geology, and physics to investigate life that may exist beyond our planet. Continued research on new planets in distant galaxies is not only about physical observations but also the development of new technologies that are increasingly efficient in exploring and analyzing space objects. The debate about how to properly detect signs of life, such as biosignatures in planetary atmospheres, is also ongoing. In many cases, scientists use algorithms and artificial intelligence to process large amounts of data, creating new ways to interpret information obtained from observations. Futuristically, the potential discovery of new planets could give rise to further exploration missions, either with robotics or manned missions to locations outside our solar system. This leads to the hope that we may one day be able to visit or send missions to habitable planets. Thanks to the discovery of new planets in distant galaxies, our understanding of the universe and our place in it continues to expand. With a commitment to research and exploration, the future of astronomy promises even more exciting and amazing discoveries in the search for life beyond Earth.