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OrbitLab
How fast is this object moving away from us?
When a light source moves away, its wavelength stretches toward the red end of the spectrum — measuring exactly how much a known spectral line has shifted gives the redshift z, directly convertible to a recession velocity for modest speeds.
Edwin Hubble's discovery that distant galaxies show systematically higher redshift the farther away they are (more distant = faster receding) was the original evidence for the universe's expansion.
Molar mass of any chemical formula (e.g. H2O, C6H12O6, Ca(OH)2).
OpenPercent composition of an element within a chemical formula.
OpenSimplest whole-number ratio formula from elemental masses or percentages.
OpenPercent yield from actual and theoretical reaction yields.
OpenRedshift (z)
0.006
What you entered
z = (λ_observed − λ_rest) ÷ λ_rest
(660 − 656.3) ÷ 656.3= 0.0056Recession velocity ≈ z × c
0.0056 × 299792.458 km/s= 1690.1297 km/sResult
Redshift (z): 0.006
A redshift of z = 0.006 implies this object is receding at roughly 1,690 km/s.