HR 8799 is a roughly 42 million-year-old main-sequence star located 133.3 light-years away from Earth in the constellation of Pegasus. It has roughly 1.4 times the Sun's mass and 5 times its luminosit
Spectrum of HR 8799 and planet c, obtained with the NACO adaptive optics instrument on ESO's Very Large Telescope. Credit: ESO/M. Janson.