The new discovery of the innermost planet in the solar system, known as 55 Cancri e, provides exciting new insights into the planet’s composition and characteristics. Located about 40 light years from Earth, this planet has caught the attention of astronomers. 55 Cancri e is an exoplanet that has a mass about 8 times the mass of Earth and is one of the brightest examples of a “super-Earth.” One of the most interesting findings from 55 Cancri e is that the planet is likely composed mostly of different chemicals, especially carbon. Observations using the Hubble space telescope and other telescopes suggest that the planet may have layers of graphite and even diamond, formed by extreme pressure and temperature. This provides new understanding of how planets can form in different environments. The extreme conditions at 55 Cancri e imply very high surface temperatures, reaching more than 2000 degrees Celsius. These high temperatures produce an atmosphere dense with volatile gases, which can contribute to unique weather characteristics. Cloud movements and extreme weather phenomena can cause temperatures to vary drastically between the light and dark sides. In addition, research shows that this planet has a very slow rotation. 55 Cancri e may have a fixed side that always faces its star, creating extreme conditions between the planet’s sides. This slow rotation process provides clues about the orbital evolution and gravitational interactions that occurred over billions of years. The existence of water in vapor form is also possible in the planet’s atmosphere, although its temperature makes the existence of water in liquid form highly unlikely. However, further research is needed to verify the composition of the atmosphere and the presence of elements essential for life, such as hydrogen, carbon and oxygen. Further monitoring of 55 Cancri e will not only improve our understanding of this planet, but may also help us better understand other types of planets outside our solar system. This discovery offers lessons about the wide range of possible compositions and conditions of planets that could exist in the universe. The involvement of observations from various international institutions strengthens cooperation in space research. Advanced telescopes such as TESS (Transiting Exoplanet Survey Satellite) and JWST (James Webb Space Telescope) are expected to provide more data about this planet and other planets like it. Public involvement in data computing and AI training also plays a role in processing information that can help further discoveries in the field of astrobiology. With increasingly advanced understanding of exoplanets, such as 55 Cancri e, we are moving closer to answering big questions about the existence of life beyond Earth. The continued evolution of observation and research technology will pave the way for even more exciting discoveries in the future study of other planets.