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Nitrogen-vacancy centers are defects in which a nitrogen atom substitutes for a carbon atom in the lattice and a vacancy left by a missing carbon atom is immediately adjacent, leaving unbonded electrons whose states can be precisely controlled. NV centers occur naturally in diamond or can be created artificially.

This is a computerised simulation of TCNQ molecules on graphene layer, where they acquire a magnetic order.

The shape of 224Ra deduced from the CERN measurements.

Hubble found the building blocks for Earth-sized planets in an unlikely place – the atmospheres of a pair of burned-out stars called white dwarfs.

A NASA Terrier-Improved Orion sounding rocket leaves the launch pad at Roi Namur, the Republic of the Marshall Islands, as part of the Equatorial Vortex Experiment (EVEX). The rocket was launched 90 seconds after a Terrier-Oriole sounding rocket as part of a study of post-sunset solar storms.

This artist's concept illustrates the frenzied activity at the core of our Milky Way galaxy. The galactic center hosts a supermassive black hole in the region known as Sagittarius A*, or Sgr A*, with a mass of about four million times that of our sun. The Herschel space observatory has made detailed observations of surprisingly hot gas that may be orbiting or falling toward the supermassive black hole.

After one hour and 19 minutes, there is no fog on the area of the visor where VitreOx has been applied.

An illustration of a single-stranded DNA homopolymer translocating through a silicon nitride nanopore.

The maps in this animation show how the sky looks at gamma-ray energies above 100 million electron volts (MeV) with a view centered on the north galactic pole. The first frame shows the sky during a three-hour interval prior to GRB 130427A. The second frame shows a three-hour interval starting 2.5 hours before the burst, and ending 30 minutes into the event. The Fermi team chose this interval to demonstrate how bright the burst was relative to the rest of the gamma-ray sky. This burst was bright enough that Fermi autonomously left its normal surveying mode to give the LAT instrument a better view, so the three-hour exposure following the burst does not cover the whole sky in the usual way.

Crown ether “cages” trap potassium ions but leave nanotubes with a repellant negative charge in solutions that will be valuable for forming very strong, highly conductive carbon nanotube fibers. The Rice University discovery appears in ACS Nano.