WASP-76b
WASP-76b is a Hot Jupiter exoplanet in the constellation Pisces. Discovered on October 21, 2013, it orbits an F-type star BD+01 316 (WASP-76), and its mass is 0.92 times mass of the Jupiter. The planet's equilibrium temperature is ; however, its measured dayside temperature is still hotter at . Studies suggest that WASP-76b is the only planet in its star system. Combination of data from the Hubble and Spitzer Space Telescopes has allowed the detection of titanium oxide and traces of water in the atmosphere of the planet. A later, higher-resolution spectrum, has features of ionized Li, Na , Mg, Ca, Mn, K, and Fe, but no ionized Ti, Cr, Ni, or molecular oxides of Ti, V or Zr were found. The presence of calcium was confirmed in 2021. The atmosphere of WASP-76b is cloudy and mostly grey, with a significant amount of thermal incandescence. Iron rain speculation. In March 2020, it was speculated the temperature on the planet could reach on the hot side, hot enough to vaporize neutral iron. If the night side of WASP-76b had temperatures down to at least , the iron could condense and rain down as a liquid. In May 2020, it was discovered  what the previous spectra of WASP-76b, taken by the Hubble Space Telescope, were distorted by the light from a suspected stellar companion. Therefore, updated atmospheric model is cloudy hydrogen-helium envelope, non-detection of alternatively reported neutral iron (including "iron rain"), and only upper limits on oxides of titanium and vanadium. By 2021, the controversy was resolved by demonstrating that the tentative iron condensation signal may also appear due to the temperature asymmetry between leading and trailing limbs, although existing data does not allow distinguishing between the two scenarios. Planetary atmospheric circulation models for WASP-76b suggest a dense cloud layers  formed of aluminum oxide, neutral iron, or magnesium orthosilicate, but no significant nightside condensation of iron.