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
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).
Source: Subaru telescope/Press Release
