Cosmic Optics

In the catalog of extrasolar worlds discovered by the Kepler Space Telescope , few systems challenge our understanding of planetary formation as dramatically as Kepler-36 . Located approximately 1,200 light-years from Earth in the constellation Cygnus , this system is home to two planets orbiting in unprecedented proximity. The outer companion, Kepler-36c , is a classic sub-Neptune —a class of planets intermediate in size between Earth and Neptune that has no analogue in our own Solar System. While its inner neighbor, Kepler-36b, is a dense, scorched super-Earth , Kepler-36c is a highly bloated, low-density world wrapped in a massive envelope of primordial hydrogen and helium . First confirmed in 2012 using transit timing variations , Kepler-36c has become a cornerstone target for astrophysicists studying planetary atmospheres, orbital dynamics, and migration theory . The physical contrast between the two tightly packed planets, which orbit their host star at distances differi...

Introduction to a Scorched Giant Deep within the northern constellation of Cygnus, approximately 1,040 light-years from Earth, lies one of the most thermally extreme and dynamically violent worlds ever confirmed by modern astrophysics: HAT-P-7b. Discovered in 2008 by the Hungarian Automated Telescope Network (HATNet) project, and subsequently observed in exquisite detail by NASA’s Kepler Space Telescope, this remarkable gas giant belongs to the class of exoplanets known as "Hot Jupiters." With a mass roughly 1.8 times that of Jupiter and a radius approximately 1.4 times larger, HAT-P-7b is a highly compressed, bloated ball of hydrogen, helium, and vaporized heavy elements, subjected to a relentless onslaught of stellar radiation that shapes its atmospheric chemistry in extraordinary ways. Unlike the cold, quiet gas giants of our outer Solar System, HAT-P-7b exists in a state of permanent thermal fury. Its physical...