What concept must a blueshifted galaxy be overcoming in the general cosmic context?
Answer
The Hubble flow imposed by the universe's overall expansion.
Since cosmic expansion drives recession (redshift), a galaxy moving toward us (blueshift) must have a local motion, known as peculiar velocity, strong enough to counteract the general outward flow.
Related Questions
What specific motion is indicated by a blue shift observed in astronomical light?How do the wavelengths of light change during a blue shift compared to a redshift?What phenomenon related to sound waves provides an analogy for the physical principle causing light shifts?When analyzing a galaxy's spectrum, what observation confirms a blue shift compared to laboratory standards?What is the primary reason most distant galaxies exhibit a cosmological redshift?How is the redshift parameter ($z$) quantified for an object exhibiting a blueshift?What concept must a blueshifted galaxy be overcoming in the general cosmic context?What is the most prominent example of a blueshifted galaxy relative to the Milky Way?What is the approximate speed at which the Andromeda Galaxy is moving toward the Milky Way?Besides galaxy recession/approach, what internal galactic process can cause a differential Doppler shift?