the.com/redshift
the universe stretching your light like cosmic taffy as galaxies flee the scene
discoveryHubble proved the universe expands using it in 1929
speed proofdistant galaxies recede faster than nearer ones
record holdersome galaxies seen as they were 13 billion years ago
color shiftlight slides toward red, the spectrum's slow end
doppler cousinsame effect that drops a passing siren's pitch