Dr. Bill Boynton

Stages in the seasonal disappearance of surface ice from the ground around the Phoenix Mars Lander are visible in these images taken on Feb. 8, 2010, (left) and Feb. 25, 2010, during springtime on ...

The dunes in this VIS image are located in Aonia Terra.

This is a Mars Odyssey visible color image of an unnamed crater in western Arcadia Planitia (near 39 degrees N, 179 degrees E). The crater shows a number of interesting internal and external featur...

Mars radiation levels are two to three times higher than around Earth.

This graphic shows the ongoing contributions of NASA’s rovers and orbiters during a Martian dust storm that began on May 30, 2018.

This rainbow-colored map shows underground water ice on Mars. Cool colors are closer to the surface than warm colors; black zones indicate areas where a spacecraft would sink into fine dust; the ou...

Download a PDF of the Explore Mars Sticker.

This image from NASA's Mars Odyssey shows ice-rich clouds over the summit of Arsia Mons.

Interact with this 3D model of Mars Odyssey.

Mars is experiencing large regional dust storms over its northern hemisphere during the past week.

Although this may look like a hostile alien life form, it's actually a complex line of sand dunes near the northern ice cap of Mars.

Sand-laden jets shoot into the polar sky in this view by noted space artist Ron Miller.

NASA’s 2001 Mars Odyssey orbiter is depicted in this illustration.

This image from NASAs Mars Odyssey shows lava flows from Alba Mons, and a tectonic graben called Cyane Fossae.

As fractures opened near the summit of Tyrrhena Patera, the ground collapsed to make pits and chains of pits aligned with the fractures. The large pit seen here is about 400 m (1,300 ft) deep.

The dune field in this polar region crater looks like a stubby arrow pointing the way west. This unnamed crater is located in Planum Chronium.

Newly detailed mapping of local variations in Mars' gravitational pull on orbiters (center), combined with topographical mapping of the planet's mountains and valleys (left), yields the best-yet ma...

This image from NASA's 2001 Mars Odyssey spacecraft shows part of the caldera floor of Arsia Mons. Arsia Mons is the southernmost of the Tharsis volcanoes. It is 270 miles in diameter, almost 12 mi...

This image is located near the boundary between Syrtis Major and Isidis Planitia. The top of the image shows rough material that has eroded away from the lower portion of the image, revealing an un...

Around 200 kilometers long, Ravi Vallis was born in a flood of water from Aromatum Chaos.

Odyssey launched on Boeing's Delta II 7925 that uses nine strap-on solid rocket motors.

The floor of this crater in Terra Sirenum contains layered material. The layered sedimentary material on Mars is arguably the most interesting and compelling material on the planet. These layers mo...

This mosaic of daytime infrared images of Gusev Crater, taken by the camera system on the Mars Odyssey spacecraft, has been draped over topography data obtained by Mars Global Surveyor.

This image captured by NASA's 2001 Mars Odyssey spacecraft shows a section of Nanedi Valles, located in Xanthe Terra.

This mosaic of infrared images shows the abundance and location of hematite at Opportunity's landing site, Meridiani Planum. On Earth, hematite is a mineral that typically forms in water.