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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.

Herbig-Haro 30 is the prototype of a gas-rich "young stellar object" disk around a star. The dark disk spans 40 billion miles (64 billion kilometers) in this image from NASA's Hubble Space Telescope, cutting the bright nebula in two and blocking the central star from direct view.

http://www.jpl.nasa.gov/news/news.php?release=2014-032&rn=news.xml&rst=4029

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Radiation and winds from massive stars have blown a cavity into the surrounding dust and gas, creating the Trifid nebula, as seen here in infrared light by NASA's Wide-field Infrared Survey Explorer, or WISE.