There is very limited information known about the exoplanetary systems in the beyond. These are the seven planets around the TRAPPIST-1 star that I’m interested in. This primary star is fainter than the Sun, and the planets around it are about ten times closer than Mercury in our solar system, which causes a phenomenon called tidal fixation, where one side of the planet is always facing the primary star. This would create an environment different from that of the planets in our solar system. Furthermore, depending on whether the main atmosphere of these planets is mainly carbon dioxide like Venus...

（Development of the plasma wave receiver equipped with JUICE） One of the roles of Staff is to make a long-term investment, i.e., to work hard on tasks that do not produce immediate results. With your help, we have been responsible for the development of the following projects, especially the electric and radio wave observation equipment and data processors. – Hisaki / Exceed (launched successfully in September 2013! On going) – Geospace explorer ERG (launched in 2016) – BepiColombo (launched in 2017，scheduled for 2024-2026 in orbits) – ESA JUICE (launch in 2022，scheduled for 2029-2031 in orbits) In parallel, he is participating...

Atmospheric and electromagnetic phenomena on the planet vary dynamically on various timescales and must be observed continuously for long periods to understand them. However, large telescopes such as Subaru Telescope are generally open for public, which makes it difficult to make continuous observations for long periods. We have been developing a unique observation network by installing state-of-the-art instruments in our own observational facilities, which are capable of continuously monitoring planets. In 1985, our laboratory developed the infrared heterodyne spectrometer, and it has been useful for the study of the Earth’s atmosphere such as ozone. In recent years, in collaboration with...