Possible Opaline Silica in the Central Uplift of Elorza Crater
Elorza Crater is a complex crater located north of Coprates Chasma. This image from NASA's Mars Reconnaissance Orbiter centers on the southwestern portion of the central uplift, characterized by numerous bedrock exposures and coherent impact melt flows.
This image from NASA's Mars Reconnaissance Orbiter shows frosted gullies on a south-facing slope within a crater. At this time of year only south-facing slopes retain the frost, while the north-facing slopes have melted.
This frame from an animation simulates a flyover of a portion of a Martian canyon detailed in a geological map produced by the U.S. Geological Survey and based on observations by the HiRISE camera on NASA's Mars Reconnaissance Orbiter.
The frosted gullies in this observation from NASA's Mars Reconnaissance Orbiter are located along an irregularly shaped pit which lies within an impact crater in Sisyphi Planum ocated northwards of the Southern polar layered deposits.
The Athabasca region contains some of the youngest lava flows on Mars. This looks like a circular island surrounded by a 'sea' of smooth-looking lava flows. This image was observed by NASA's Mars Reconnaissance Orbiter.
Transverse aeolian ridges (TARs) are commonly found throughout the Martian tropics, including rocky regions such as Syrtis Major that are largely devoid of dust as seen by NASA's Mars Reconnaissance Orbiter.
Mars Orbiter Observes Comet Siding Spring (Animation)
This frame from an animated artist's rendering begins with NASA's Mars Reconnaissance Orbiter spacecraft above Mars. The movie then transitions to a sequence of HiRISE images of the comet taken as it flew past Mars.
This frame from a movie sequence of images from NASA's Mars Reconnaissance Orbiter (MRO) shows comet C/2013 A1 Siding Spring before and after its close pass by Mars in October 2014. False color enhances subtle variations in brightness in the comet's coma.
Five images of comet Siding Spring taken within a 35-minute period as it passed near Mars on Oct. 19, 2014, provide information about the size of the comet's nucleus. The images were acquired by the HiRISE camera on NASA's Mars Reconnaissance Orbiter.
Brightness Rhythm of Mars Flyby Comet Is Clue to Rotation Rate
This graph shows changes in apparent brightness of comet C/2013 A1 Siding Spring as it approached and receded from Mars, as seen by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. The pattern suggests the comet rotates once every eight hours.