Subaru Gallery
Subaru Gallery TOPGalaxy Clusters 4.1 Billion Years Away (Left) and 6.2 Billion Years Away (Right)
March 20, 2025
Last updated: September 30, 2025
Last updated: September 30, 2025
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Low Res. ( 142 KB) / Mid. Res. ( 570 KB) / High Res. ( 5.1 MB)
As the Universe expands, the wavelengths of light emitted from distant celestial objects are stretched, causing the light to appear redder. This phenomenon is known as redshift, where light from more distant objects becomes redder. In the case of these two galaxy clusters, the cluster located 6.2 billion light-years away (right) is farther than the cluster 4.1 billion light-years away (left), showing redder colors. Redshift is crucial for astronomers to measure a precise distance to a distant object.
Please click 4.1 Billion Years Away（ 9.2 MB ） / 6.2 billion light-years away（ 9.8 MB） for high-resolution images.
(Credit: NAOJ; Image provided by Masayuki Tanaka)
【Instrument】Hyper Suprime-Cam (HSC)
Announcement (as of March 21, 2025):
In commemorating the Subaru Telescope’s 25th anniversary, we have added new gallery images twice a month since April 2024. We hope you have enjoyed the stunning images captured by the Subaru Telescope. A new series will launch in April 2025, featuring a new image of Maunakea on the first Thursday of each month and a celestial image taken by the Subaru Telescope on the third Thursday (Japan Standard Time). Please stay tuned to the Subaru Gallery throughout Fiscal Year 2025 (April 2025 – March 2026).
As the Universe expands, the wavelengths of light emitted from distant celestial objects are stretched, causing the light to appear redder. This phenomenon is known as redshift, where light from more distant objects becomes redder. In the case of these two galaxy clusters, the cluster located 6.2 billion light-years away (right) is farther than the cluster 4.1 billion light-years away (left), showing redder colors. Redshift is crucial for astronomers to measure a precise distance to a distant object.
Please click 4.1 Billion Years Away（ 9.2 MB ） / 6.2 billion light-years away（ 9.8 MB） for high-resolution images.
(Credit: NAOJ; Image provided by Masayuki Tanaka)
【Instrument】Hyper Suprime-Cam (HSC)
Announcement (as of March 21, 2025):
In commemorating the Subaru Telescope’s 25th anniversary, we have added new gallery images twice a month since April 2024. We hope you have enjoyed the stunning images captured by the Subaru Telescope. A new series will launch in April 2025, featuring a new image of Maunakea on the first Thursday of each month and a celestial image taken by the Subaru Telescope on the third Thursday (Japan Standard Time). Please stay tuned to the Subaru Gallery throughout Fiscal Year 2025 (April 2025 – March 2026).
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