An article published in the journal “Astronomy & Astrophysics” reports a study on the exoplanet LTT 9779 b, an ultrahot Neptune that was defined as the largest mirror in the universe because it reflects about 80% of the light it receives from its star. A team of researchers used observations conducted with ESA’s CHEOPS space telescope to study LTT 9779 b. They were able to calculate what is technically called albedo, the amount of light it reflects, in this case at exceptional levels. The conclusion is that such an extreme albedo is due to reflective metal clouds.