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The Kepler-16 system is home to the first confirmed transiting circumbinary planet-- a planet that orbits two stars. Kepler-16b, is not unlike Luke Skywalker's home planet of 'Tatooine' in the Star Wars universe. However, Kepler-16b is cold, gaseous and not suitable for life.

A dramatic, fresh impact crater dominates this image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on Nov. 19, 2013.

In this rendering of the SecA nanomotor, the two pistons (coloured cyan and light green) await the arrival of a protein. Cylinders, arrows and loops make up the nanomotor’s mechanical parts.

This is a conceptual drawing of an electronic circuit comprised of interconnected graphene nanoribbons (black atoms) that are epitaxially grown on steps etched in silicon carbide (yellow atoms). Electrons (blue) travel ballistically along the ribbon and then from one ribbon to the next via the metal contacts. Electron flow is modulated by electrostatic gates.

A mid-level solar flare erupted on the sun late on Feb. 3, 2014, peaking at midnight EST. This image, captured by NASA's Solar Dynamics Observatory, shows the bright flare near the center of the sun.

A screen shot from the Milky Way Project illustrates how users are asked to catalog objects in our galaxy.

This is a schematic of an endothelialized microfluidic device that consists of two-layer microfluidic channels that are separated by a porous membrane (3 μm pore) on which endothelial cells are grown.

A close-up of an elastic polymer that was cut in two and healed overnight.

This illustration shows the unusual orbit of planet Kepler-413b around a close pair of orange and red dwarf stars.

A rainbow of lunar transits as seen by NASA's Solar Dynamics Observatory. The observatory watches the sun in many different wavelengths of light, which are each colorized in a different color.