Science | WPN World People News

This composite shows the alignment of the satellite galaxies of Andromeda, in relation to the view that we see from Earth (the top left panel shows a true-color image of the center of the Andromeda galaxy taken with the Canada France Hawaii Telescope). New distance measurements allow us to ascertain the three-dimensional positions of the satellite galaxies, which together with new velocity measurements, reveal their true nature as part of a gigantic rotating structure (side view: bottom left panel; front view: top right panel).

Illustration shows the layered structure of the new device, starting with a flexible layer of graphene, a one-atom-thick carbon material. A layer of polymer is bonded to that, and then a layer of zinc-oxide nano wires (shown in magenta), and finally a layer of a material that can extract energy from sunlight, such as quantum dots or a polymer-based material.

Rice University researchers found that pulsed (or "nonstationary") lasers could narrow the response spectra of 60-nanometer-wide gold nanoshells to a very narrow spectral band (red peak), as opposed to continuous ("stationary") excitation by laser (green peak). The discovery opens new possibilities for the use of metallic nanoparticles in medical and electronic applications.

An image of the Curiosity Explorer badge that can be earned by Foursquare users who check into a NASA visitor center or a venue categorized as a science museum or planetarium.

This image shows polarized light interacting with a particle injected into a liquid crystal medium.