Have astronomers ever observed a violet shift like they have blue shifts and red shifts?

Infrared astronomy reveals the secrets of the Universe beyond

天文学家是否观察过“紫移”，它和蓝移有什么联系- 知乎

The Doppler Effect: Redshift, Blueshift, and Why to Give a Shift

Are their examples of redshift or blueshift on Earth (not

Discovery of Hubble hydrogen spectrum cosmology explaining what is

As a light source moves toward us, it blue shifts. As it moves away, it

Redshift and Distance in the Expanding Universe

The Big Bang: a reality or perception?

Blue shift - Simple English Wikipedia, the free encyclopedia

The Doppler Effect: Redshift, Blueshift, and Why to Give a Shift