Featured Images

Hypervelocity!

The blocky rim of Posidonius Y crater formed as an asteroid or comet slammed into the Moon, releasing tremendous energy. The image is 1825 meters wide, image reduced by 2.9x, NAC M168041107LR [NASA/GSFC/Arizona State University].

Published on 11 May 2026

A Tortuous Path in Posidonius

This may look like a work of abstract art, but in reality, it's for science! This colorful image is an LROC slope map of the northwestern portion of the floor of Posidonius crater. Warmer colors indicate steeper slopes, whereas cooler...

Published on 31 Jul 2014

A Kink in Rima Krieger

Rima Krieger winds its way through Oceanus Procellarum. Image width is ~ 3.5 km. Taken from LROC NAC image M1152172510R [NASA/GSFC/Arizona State University].

Published on 20 May 2014

Source Vent for Rima Prinz I

Newly released LROC NAC Digital Terrain Model (DTM) of Rima Prinz I where it meets the source crater Vera (~2 km in diamter). Image is approximately 7 km across [NASA/GSFC/Arizona State University].

Published on 19 Dec 2013

Rim Slumping

Faulting of a crater rim. Downhill to lower right, NAC M187307653, image width is ~1.9 km [NASA/GSFC/Arizona State University].

Published on 10 Apr 2013

Downhill Creep or Flow?

Southern slope of a fracture developed in Vitello crater floor, downslope is toward upper left of the image. Image center is 30.214°S, 322.352°E, width is 640 m, LROC NAC M1101460425L [NASA/GSFC/Arizona State University]. 

Published on 04 Apr 2013

Wrinkle Ridge vs. Impact Crater

An impact crater modified by a wrinkle ridge. NAC M1114391184R, image width is 3.2 km [NASA/GSFC/Arizona State University].

Published on 06 Mar 2013

Meanders in Posidonius

Small portion of a S-shaped meandering rille on the floor of Posidonius Crater (31.93°N, 29.85°E, 100 km diameter) - a floor-fractured crater. The curves in the rille are very tight. LROC NAC M1098658474R [NASA/GSFC/Arizona State...

Published on 05 Feb 2013

Posidonius Y

A boulder perched on the rim of a Copernican crater in Mare Serenitatis. NAC frame number M168041107L, image width is 250 meters [NASA/GSFC/Arizona State University].

Published on 25 Oct 2011

Pattern of dark deposits

A portion of central peak at Vitello crater. Image number M135433752L. Image resolution is 0.5 m/pixel, image width 600 m. Incidence angle 61°, sunlight direction is from upperleft [NASA/GSFC/Arizona State University].

Published on 01 Sep 2011

Discontinuous rilles

Northwestern edge of disconnected depression (14.53°N, 311.43°E) from Rima Marius. Image number M135507533R, incidence angle 58°, image width is 550 meters [NASA/GSFC/Arizona State University].

Published on 12 May 2011

Rima Calippus

Rima Calippus in northwest Mare Serenitatis, boulders on the larger branch are possibly outcrop waiting to be sampled. LROC NAC M102078117, image width is 1600 m [NASA/GSFC/Arizona State University].

Published on 01 Mar 2011

Rupes Recta

Rupes Recta is a well-known linear rille that extends over 100 km in length! Portion of LROC WAC monochrome mosaic, illumination is from the left, and asterisk notes location of LROC NAC (below) [NASA/GSFC/Arizona State University].

Published on 09 Feb 2011

Rilles as far as the eye can see in Prinz!

LROC WAC mosaic of the rille-rich Prinz crater region. Bench-like features are visible in the Prinz B depression and two flows originating in Prinz B converge just west of the arrow [NASA/GSFC/Arizona State University].

Published on 03 Dec 2010

Secrets of Schröteri

Vallis Schröteri is a magnificent sinuous rille and of particular interest is its inner rille, which diverges from the primary rille near the arrow. This nested form indicates that multiple eruptive events occurred or there was a large...

Published on 02 Dec 2010

Rimae Posidonius

Spanning over 130 km in length, Rimae Posidonius is a sinuous rille winding across the floor of Posidonius crater. LROC WAC mosaic at 100 m/pixel, arrow points to the rille and location of an LROC NAC close-up [NASA/GSFC/Arizona State...

Published on 01 Dec 2010