high-redshift supernovae

High-redshift supernovae are powerful explosions of stars that occur in the distant universe, billions of light-years away. The term "high redshift" refers to the way light from these supernovae appears stretched to longer wavelengths due to the universe's expansion. This stretching causes their light to shift toward the red end of the spectrum. Astronomers study high-redshift supernovae to understand the universe's history, including its expansion rate and the nature of dark energy. These supernovae act as cosmic beacons, helping scientists explore the properties of the universe during its early stages.