Science January 11, 2023

Model-Independent Method to Weigh Protoplanetary Disks

Astronomers have found a way to directly measure the amount of gas in protoplanetary disks without needing to make assumptions about the relative amounts of different types of gas, making this method more accurate and robust than previous methods.

This article is including a link to a article for kids.

Topics January 6, 2023

A new-year’s message from the Director General, NAOJ

A new-year’s message from the Director General Saku Tsuneta

Topics December 21, 2022

Experience the Diversity of Astronomy Observatories Virtually

Virtual Reality 3D showcases of the Subaru Telescope, Observatory History Museum, and Solar Tower Telescope available for you to enjoy.

Science December 15, 2022

Machine Learning Reveals How Black Holes Grow

Machine learning has deduced the rules governing the relationship between the growth of a galaxy and the growth of the supermassive black hole at its center. The tight correlation between the two growth rates found in this research confirms a decades-old theory.

This article is including a link to a article for kids.

Topics December 7, 2022

Samurai Astronomers’ Letters to be Registered as an Important Cultural Property

Seigaku Shukan, a set of Edo Period documents held by NAOJ, is going to be registered as an Important Cultural Property, according to a report from the Council for Cultural Affairs to the MEXT Minister on November 18, 2022.

Science November 22, 2022

International Team Observes Innermost Structure of Quasar Jet

An international team of scientists has observed the narrowing of a quasar jet for the first time by using a network of radio telescopes across the world. The results suggest that the narrowing of the jet is independent of the activity level of the galaxy which launched it.

Science November 14, 2022

Gold-rich Stars Came from Ancient Galaxies

Recently, hundreds of gold-rich stars have been detected by state-of-the-art telescopes worldwide. New simulations of galaxy formation, with the highest resolution in both time and mass, show that these gold-rich stars formed in progenitor galaxies, small galaxies which merged to create the Milky Way.

Topics November 11, 2022

2400 New Eyes on the Sky to See Cosmic Rainbows

The Subaru Telescope successfully demonstrated engineering first light with a new instrument that will use about 2400 fiberoptic cables to capture the light from heavenly objects. Full operation is scheduled to start around 2024.

Science October 27, 2022

Rare Earth Element Synthesis Confirmed in Neutron Star Mergers

A group of researchers has, for the first time, identified rare earth elements produced by neutron star mergers.

Topics October 26, 2022

First Radio-Astronomy Cryogenic Receivers with All-Metal 3D-Printed RF Components

The NAOJ ALMA Project and Advanced Technology Center have successfully fabricated corrugated all-metal 3D-printed horns for the ALMA Band 1 receivers (Radio Frequency: 35-50 GHz).