Wednesday, October 08, 2025

Close up: The Orion Nebula (M42)—Visible Spectrum | Subaru Telescope

Close up: The Orion Nebula (M42)—Visible Spectrum | Subaru Telescope

The Orion Nebula (M42), located in the winter constellation Orion, is known as a star-forming region located relatively close to Earth, approximately 1,500 light-years away. Its large apparent size makes it easy to find with the naked eye, and a large number of stars can be seen through a telescope.

At the center of the red nebula seen in high-mass star-forming regions is the Trapezium, a cluster of newly formed stars. The ultraviolet rays from the Trapezium ionize hydrogen gas, causing it to glow red.

This image was created using a three-color composite, with the g-band (wavelength 470 nanometers), i-band (wavelength 760 nanometers), and y-band (wavelength 980 nanometers) assigned to blue, green, and red, respectively. It was taken with the Subaru Telescope's Hyper Suprime-Cam (HSC), an ultra-wide-field prime focus camera.

The Subaru Telescope is an astronomical observation facility operated by the National Astronomical Observatory of Japan (NAOJ). It is located at the summit of Mauna Kea at an altitude of 4,200 meters in the U.S. state of Hawaii.

Learn more about Japan's Subaru Telescope: 
https://subarutelescope.org/en/


Credits: National Astronomical Observatory of Japan; Image provided by Michitaro Koike and Masayuki Tanaka
Duration: 2 minutes
Release Date: June 17, 2025


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