From National Astronomical Observatory of Japan : “Next generation of telescope equipment begins arriving in Hawai`i”


National Astronomical Observatory of Japan

April 27, 2018

Summary of PFS, including the Metrology Camera.

An instrument that will help astronomers study dark matter and galaxies in detail has begun to be assembled at NAOJ’s Subaru Telescope in Hawai`i.

The Metrology Camera is the first of several sub-components currently under construction worldwide to be assembled at its final destination in order to create the Prime Focus Spectrograph (PFS). When the PFS is mounted on the telescope, it will be able to measure spectra of up to 2400 celestial objects in the night sky all at once. This is important because it will help astronomers understand how stars and galaxies are distributed, and how they move around us, affected by the presence of dark matter. Studying millions of stars and galaxies across large areas of sky will therefore help create a dark matter map of our Universe.

The camera arrived in Hawai`i last Friday (April 20) from the Academia Sinica, Institute of Astronomy and Astrophysics in Taiwan, the collaborators in the PFS project who developed it. After checks to make sure the Metrology Camera is not damaged during transportation, the camera will be shipped to the Subaru Telescope on the summit of Mauna Kea for further tests in the telescope’s dome in May, and on the telescope in June and July. Other subcomponents will then follow, and the PFS will be completed.

Led by the University of Tokyo Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the PFS project is an international collaboration to conduct an unprecedented census of the Universe, taking advantage of the Subaru Telescope to take a wide shot of the night sky with great depth. Combining data from the PFS and Hyper Suprime-Cam, astronomers hope to learn more about the nature of dark matter, dark energy, galaxy growth history, and challenge our understanding of the Universe and underlying physics.

NAOJ Subaru Hyper Suprime-Cam

In the current schedule, the PFS is anticipated to start its experimental run at the Subaru Telescope in 2019, before starting a formal survey in 2021.

See the full article here .

Please help promote STEM in your local schools.


Stem Education Coalition
The National Astronomical Observatory of Japan (NAOJ) is an astronomical research organisation comprising several facilities in Japan, as well as an observatory in Hawaii. It was established in 1988 as an amalgamation of three existing research organizations – the Tokyo Astronomical Observatory of the University of Tokyo, International Latitude Observatory of Mizusawa, and a part of Research Institute of Atmospherics of Nagoya University.

In the 2004 reform of national research organizations, NAOJ became a division of the National Institutes of Natural Sciences.


NAOJ/Subaru Telescope at Mauna Kea Hawaii, USA,4,207 m (13,802 ft) above sea level

Solar Flare Telescope

Nobeyama Radio Telescope - Copy
Nobeyama Radio Observatory

Nobeyama Solar Radio Telescope Array
Nobeyama Radio Observatory: Solar

Misuzawa Station Japan
Mizusawa VERA Observatory

NAOJ Okayama Astrophysical Observatory Telescope
Okayama Astrophysical Observatory