National Astronomical Observatory of Japan

C Projects

Solar Science Observatory

About Solar Science Observatory

The Sun is a typical star, but as the nearest star it dominates the Solar System. The Sun influences all of our activities. The magnetic activity in the Sun is representative of phenomena ubiquitous throughout the Universe. One of our major goals is to understand the solar magnetic field and magnetic activity through various scientific observations and analyses.

In the Solar Science Observatory, we push forward the leading edge of solar physics, by making maximum use of data taken by artificial satellites and large ground-based facilities, and by developing advanced observational instruments. We also promote the scientific operation of the Hinode satellite in cooperation with the Institute of Space and Astronautical Science, and support studies using the data obtained by Hinode. We carry out long-term continuous observation via our facilities in NAOJ, and provide data for joint studies. Theoretical considerations and computer simulations are necessary tools for the analyses of these data, and we help develop them as important research methods as well.


Largest sunspots of the current activity cycle (Top row from left to right: Whole Sun images in X-rays, white light, Hα, and HeI10830Å lines. Bottom row from left to right: Hinode/SOT CaIIH line image, white light image, circular polarization image, and whole Sun circular polarization map.)


Solar Flare Telescope

Solar Flare Telescope

The Solar Flare Telescope is the primary ground-based instrument for solar observation located in the western part of Mitaka Campus.

Solar Flare Telescope


Solar Observing Satellite “Hinode”

Since its launch in September 2006, the Solar Observing Satellite Hinode has observed the Sun in three different wavelength ranges: visible light, extreme-ultraviolet, and soft X-rays.

Solar Observing Satellite “Hinode”

Solar Science Observatory Official Website