One of the discovery images of the system obtained at the Keck II. Credit: NRC-HIA, C. Marois and Keck Observatory
One of the discovery images of the system obtained at the Keck II telescope using the adaptive optics system and NIRC2 Near-Infrared Imager. The rectangle indicates the field-of-view of the OSIRIS instrument for planet C. Credit: NRC-HIA, C. Marois and Keck Observatory