Cosmic Optics

Discovered by NASA’s Kepler Space Telescope in 2013, the exoplanet Kepler-62f represents one of the most geophysically compelling targets within the catalog of confirmed Super-Earths . Located approximately 990 light-years from Earth in the constellation Lyra , this distant body orbits Kepler-62 , a K-type dwarf star characterized by a lower mass, radius, and temperature than our Sun. With a physical radius measured at 1.41 times that of Earth, Kepler-62f sits precisely in the transition zone where planetary dynamics shift from purely terrestrial rocky surfaces to volatile-rich envelopes. Its structural properties make it a premier laboratory for understanding the thermodynamic evolution of massive rocky bodies outside our solar system. Orbital Mechanics and Stellar Radiative Forcing Kepler-62f occupies the outermost position of its five-planet system, revolving around its host star at an average semi-major axis of approximately 0.718 astronom...

Kepler-20e represents a pivotal milestone in the history of exoplanetary science. Discovered by NASA’s Kepler mission in December 2011, it was the first planet smaller than Earth ever found orbiting a Sun-like star. Located approximately 950 light-years away in the constellation Lyra, this terrestrial body occupies a brutal environment characterized by high-energy irradiation and gravitational extremes. Unlike the gas giants that dominated early exoplanetary catalogs, Kepler-20e is a dense, rocky sphere with a physical composition primarily consisting of silicates and iron, offering a stark look at the diversity of planetary systems beyond our own. Geological Composition and Internal Structure Physical models derived from its mass and radius indicate that Kepler-20e is a strictly terrestrial world. With a radius approximately 0.87 times that of Earth, it is roughly the size of Venus. However, its proximity to its host star, Kepler-20, has resulted in a density that suggests a si...