Back to Glossary

Lunar Reconnaissance Orbiter

The Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft launched on June 18, 2009. It operates in a low polar orbit around the Moon and is mapping the lunar surface in unprecedented detail, measuring topography, radiation, temperature, and resources. Its data help identify safe landing sites, locate water ice in shadowed regions, and support future human and robotic exploration.

Source: science.nasa.gov

APODs including "Lunar Reconnaissance Orbiter"

Lunar Nearside

20/07/2025

Lunar Nearside
Image Credit: NASA Astronomy Picture of the Day

About 1,300 images from the Lunar Reconnaissance Orbiter spacecraft's wide angle camera were used to compose this spectacular view of a familiar face - the lunar nearside. But why is there a lunar nearside? The Moon rotates on its axis and orbits the Earth at the same rate, about once every 28 days. Tidally locked in this configuration, the synchronous rotation always keeps one side, the nearside, facing Earth. As a result, featured in remarkable detail in the full resolution mosaic, the smooth, dark, lunar maria (actually lava-flooded impact basins), and rugged highlands, are well-known to earthbound skygazers. To find your favorite mare or large crater, just follow this link or slide your cursor over the picture. The LRO images used to construct the mosaic were recorded over a two week period in December 2010.