[3][4] WASP-104b was discovered in 2014; according to a 2018 study at Keele University, the planet's dense atmosphere of potassium and sodium absorbs more than 97% of light it receives.
[3][5] In 2018, scientists from Keele University said the exoplanet's thick sodium and potassium atmosphere can absorb more than 97% of the light that falls on it.
[7] In 2020, a transmission spectroscopy study has indicated that WASP-104b has a red-colored cloud deck and possibly hazes.
[9] It has 12.5 times the mass of Earth and a low density, and may be composed of gas.
[10][9] WASP-104 and its planet are located 466 light years away from the Sun in the constellation Leo.