Trending Now - Subaru Telescope Reveals Chemical Evolution of Comet 3I/ATLAS

WHO:

The Daily Galaxy - Astronomers studying Interstellar Comet 3I/ATLAS (C/2025 N1).

The Daily Galaxy - Yoshiharu Shinnaka of Kyoto Sangyo University.

WHAT:

The Daily Galaxy - Astronomers uncovered insights into the formation of planets and planetesimals through the observation of Comet 3I/ATLAS.

Phys.org - The Subaru Telescope observed the interstellar comet 3I/ATLAS on January 7, 2026, after its closest approach to the sun.

Phys.org - The ratio of carbon dioxide to water in the coma around the comet was estimated to be much lower than earlier observations suggested.

WHERE:

The Daily Galaxy - The Subaru Telescope is located at the summit of Mauna Kea in Hawaii.

Phys.org - The observations of Comet 3I/ATLAS were conducted in Hawaii-Aleutian Standard Time.

WHEN:

The Daily Galaxy - Comet 3I/ATLAS was captured by the Subaru Telescope on December 13, 2025.

The Daily Galaxy - The comet made its closest approach to Earth on December 19, 2025, around 6 AM (UT).

Phys.org - The Subaru Telescope observed the comet on January 7, 2026.

WHY:

The Daily Galaxy - The study aims to uncover clues about the early days of planetary formation in various stellar systems, including our own solar system.

The Daily Galaxy - Comets like 3I/ATLAS are remnants from the early universe, carrying traces of dust and gas that existed before the birth of stars and planets.

HOW:

The Daily Galaxy - The Subaru Telescope captured images by combining three different wavelengths of light: V-band (550 nanometers), R-band (660 nanometers), and I-band (805 nanometers).

The Daily Galaxy - The telescope's high-resolution imaging capabilities and advanced spectroscopy allowed scientists to analyze the comet's chemical composition and structure.

(UPDATED April 15, 2026 21:20 UTC)

Astronomers studying the interstellar comet 3I/ATLAS have uncovered new insights into the formation of planets and planetesimals, with observations made using the Subaru Telescope located at the summit of Mauna Kea in Hawaii. The telescope captured images of the comet January 7th, revealing that the ratio of carbon dioxide to water in the comet's coma is much lower than previously thought, which may provide clues about the early days of planetary formation in our solar system and beyond. This research highlights the significance of comets like 3I/ATLAS, which are remnants from the early universe, carrying traces of dust and gas that predate the birth of stars and planets.