EVA 1: Lunar Ranging Retroreflector
Title
EVA 1: Lunar Ranging Retroreflector
Description
Photo of the Lunar Ranging Retroreflector (one of the ALSEP instruments) set up on the surface, taken by Dave Scott facing the sun during the first day of EVA. The Lunar Ranging Retro Reflector (LRRR) reflects laser pulses back to the telescopes on Earth used to illuminate it. By measuring the two-way travel time between the telescope and the LRRR, experiments can determine the distance between the two to a few centimeters and address such issues as Einstein's Theory of General Relativity and the existence of a liquid lunar core.
Creator
NASA
Source
Apollo 15 Map and Image Library
Publisher
NASA
Date
July 31, 1971
Rights
Public Domain
Relation
https://history.nasa.gov/alsj/a15/a15.alsepdep.html
Format
Type
Identifier
Coverage
ALSEP: Lunar Ranging Retroreflector
UUID
379ba219-749a-459d-9d50-9564fcf8755a
Original Format
Photo, black and white, Hasselblad 500EL Data Camera, 60 mm lens (NASA file: as15-86-11791HR.jpg)
Image URL
https://www.hq.nasa.gov/alsj/a15/AS15-85-11468HR.jpg
Source URL
https://www.hq.nasa.gov/alsj/a15/images15.html
NASA Image ID
AS15-85-11468HR
Collection
Tags
Citation
NASA, “EVA 1: Lunar Ranging Retroreflector,” The Apollo 15 Learning Hub, accessed May 25, 2025, https://apollo15hub.org/items/show/257.