Cosmic Optics

Discovered by the Transiting Exoplanet Survey Satellite (TESS) and subsequently analyzed in exquisite detail by the European Space Agency’s CHEOPS mission , the exoplanet LTT 9779 b represents one of the most extreme and baffling physical environments ever confirmed by astronomers. Located approximately 260 light-years from Earth in the southern constellation of Sculptor, this extraordinary body orbits its host star, a metal-rich yellow dwarf , at a distance of just 2.5 million kilometers. This proximity is roughly 1/60th of the distance between Mercury and our Sun, exposing the world to a relentless barrage of high-energy stellar radiation. Under normal circumstances, a world of this size would have its atmosphere completely stripped away, yet this unique body has managed to retain its volatile envelope against all physical expectations. The Phenomenon of the Cosmic Mirr...

Deep within the solar neighborhood, situated approximately 22.4 light-years away in the southern constellation of Eridanus , lies a stellar system of extraordinary complexity. Known as LTT 1445, this system is comprised of three mid-to-late M-dwarf (red dwarf) stars bound in a intricate gravitational dance. Orbiting the primary star of this trio, LTT 1445 A, is the remarkable terrestrial exoplanet LTT 1445 Ab . Discovered in 2019 using data from the Transiting Exoplanet Survey Satellite (TESS), this rocky world has quickly become a primary laboratory for astronomers seeking to understand the physical and atmospheric characteristics of close-in, tidally locked planets orbiting low-mass stars. LTT 1445 Ab is a rocky world approximately 1.3 times the radius of Earth, but possessing roughly 2.87 times its mass. This high-density profile points unequivocally to a terrestrial composition, dominated by iron, silicates, and basa...