Aside from the Moon, the brightest object in our night sky is planet Venus, whose thick cloud layer reflects around 75% of the Sun’s light. By comparison, Earth only reflects around 30% of incoming sunlight. A new analysis of data from ESA’s Cheops spacecraft shows that the ultra-short-period Neptune-sized exoplanet LTT 9779b reflects 80% of the light shone on it by its host star, LTT 9779, making it the shiniest exoplanet ever found. The reason...
