19:I[66739,["/_next/static/chunks/0.3dg.jzl0xwf.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/0qxr~fpya2kw0.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/12wfgjmhh21qu.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/028~snn2srcd-.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/079qbl7l5rd72.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/0hi8o2xq05aig.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA"],"default"] 1b:I[38632,["/_next/static/chunks/0qqtp3r0h7kah.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA","/_next/static/chunks/0iukvycbd42rl.js?dpl=dpl_BhmHa8NmNRnoMAUm8Lqp3TPz2qZA"],"IconMark"] 1a:T4ad,In addition to flying, landing, and returning from the moon in 1969 — NASA's Apollo 11 crew helped with a series of scientific experiments. One of them was to leave a special instrument with lots of little reflectors on the surface of the moon. The goal of that experiment was to beam a laser at the moon. Today on the show, Scientist-In-Residence Regina G. Barber talks to host Aaron Scott about the lunar laser ranging experiment — and how shooting that laser helped us better understand one of Einstein's theories.

Follow Aaron on Twitter @AaronScottNPR and Regina @ScienceRegina. Reach the show by beaming an email to ShortWave@NPR.org.

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Hal Walker: The Man Who Shot The Moon

Short Wave

Hal Walker: The Man Who Shot The Moon