Using the Keck Planet Imager and Characterizer (KPIC) on the Keck II telescope at the W.M. Keck Observatory, astronomers have obtained and analyzed the high-resolution spectra of the four giant planets orbiting HR 8799. An artist’s rendering of the planetary system HR 8799 at an early stage in its evolution, showing the planet HR 8799c, a disk of gas and dust, and interior planets. Image credit; Dunlap Institute for Astronomy & Astrophysics...
