[Verse 1] Einstein saw the space-time bend Predicted waves that stretch and mend But ripples smaller than a proton's size How could we catch them with our eyes? A hundred years we waited long To prove the master's theory strong [Chorus] Match the filter, find the pattern Signal processing, noise will flatten Bayesian estimation tells us more About the sources we explore LIGO listens to the sky For gravitational waves passing by [Verse 2] Two detectors, lasers bright Measuring arms with speed of light When waves pass through, the length will change By distances incredibly strange But earthquakes shake and traffic roars Ocean waves pound distant shores [Chorus] Match the filter, find the pattern Signal processing, noise will flatten Bayesian estimation tells us more About the sources we explore LIGO listens to the sky For gravitational waves passing by [Bridge] Templates hold the expected song Of black holes dancing, spinning strong Compare the signal to the template bank If patterns match, we've found theank Remove the noise with clever code Reveal the cosmic episode [Verse 3] September fourteenth, twenty-fifteen A chirp unlike we'd ever seen Point-two seconds, frequency climbed Two black holes perfectly timed Billion-light-years far away Their final dance reached Earth that day [Chorus] Match the filter, find the pattern Signal processing, noise will flatten Bayesian estimation tells us more About the sources we explore LIGO listens to the sky For gravitational waves passing by [Outro] Einstein's waves are real at last Algorithms solved the mysteries of the past A new window to the universe wide With mathematics as our guide
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