![The illustration of the planetary system is scaled to the sizes of the star, planet and planetary orbit. The first figure shows how the light from the system decreases during the occultation (when the planet goes behind the star. The second figure shows how the light would have decreased if the planet had been as reflective as Jupiter. Image: A. Brandeker. HD209458b](/polopoly_fs/1.617474.1655317448!/image/image.jpg_gen/derivatives/widescreen_690/image.jpg)
The planet around the star HD 209458 was the first discovered to transit its star. Now the space telescope CHEOPS has measured reflected light from the planet by observing how flux from the star-planet system decreases.
The planet around the star HD 209458 was the first discovered to transit its star. Now the space telescope CHEOPS has measured reflected light from the planet by observing how flux from the star-planet system decreases.