Have astronomers ever observed a violet shift like they have blue

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

Is it possible to visualise a red shift? - Quora

TATA NANO's project was shifted from Kolkata to which place?

Hubble Space Telescope 2018-2015 - eoPortal

天文学家曾观测到红移和蓝移，那么是否存在可观测的

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Redshift and blueshift: What do they mean?

In a first, astronomers spot the aftermath of an exoplanet smashup