National Astronomical Observatory of Japan

Double sun sunset no longer science fiction

| Science

Second sun

An international research team from the University of Jena (Germany), Nagoya University, and the Harvard-Smithsonian Center (USA) recently obtained the first images of the second "sun" around a planet-hosting star, gamma Cephei, using the Subaru telescope and the 3.5-meter telescope at Calar Alto (Spain). This direct detection significantly improves our knowledge of the system, such as the masses of the two stars and the minimum mass of the planet.