The researchers from the Astronomical Observatory of the University of Warsaw discovered the classical Cepheid with the longest pulsation period known in our Galaxy. This variable star is called OGLE-GD-CEP-1884, and is likely the most luminous, youngest, and most massive Cepheid known in the Milky Way. The newly discovered classical Cepheid in the Galaxy, named … Continue reading The ultra-long-period Cepheid