Sunspots are regions where strong magnetic fields exist. Occasionally, the configuration of these magnetic fields undergoes sudden changes,...

Jupiter possesses an exceptionally strong magnetic field, and within its magnetosphere lies a vast distribution of plasma released...

We focus on the volcanically active Io and the icy moon Europa. Sulfur and oxygen ions generated from...

Jupiter’s polar regions exhibit auroral emissions with complex structures. The “footprint aurora” associated with Europa is a signature...

In this study, we focus on the refraction of planetary radio emissions as they pass through the ionospheres...

Jupiter’s synchrotron radiation (JSR) is emitted from the high-energy electrons trapped in the Jupiter’s radiation belts. Its intensity...

I analyze the Martian atmosphere using observational data obtained by the near-infrared imaging spectrometer OMEGA onboard the European...

We observe auroral emissions from both space and ground, and combine them with satellites and ground-based radar to...

Venus is believed to have once possessed a substantial amount of water, but today it is an extremely...

‘Geospace’ is the space around the Earth that consist of plasma (charged particles) originating from the Earth’s atmosphere...

Have you heard that “Earth is like a giant magnet”? This magnet creates a vast region called the...

Auroras glow above the Arctic and Antarctic. Far above them, powerful radio emissions known as Auroral Kilometric Radiation...

The JAXA Arase satellite, which traverses the Earth’s radiation belts, investigates plasma activity extending from the ionosphere to...