Speed of light drops to zero at 'exceptional points'

Light, which travels at a speed of 300,000 km/sec in a vacuum, can be slowed down and even stopped completely by methods that involve trapping the light inside crystals or ultracold clouds of atoms. Now in a new study, researchers ...

Still searching for Planet 9

The solar system has eight planets. In 2006, astronomers reclassified Pluto as a dwarf planet, the same class that contains Eris, Sedna, Quaoar, Ceres and perhaps many more solar system small bodies. These are defined approximately ...

A novel way to generate visible light

Visible light is extremely important in nature. Seen by the human eye, it is the most intense light emitted by the sun to reach the earth's surface and is an essential element for fundamental biological processes underlying ...

Hubble captures cosmic fireworks in ultraviolet

Hubble offers a special view of the double star system Eta Carinae's expanding gases glowing in red, white, and blue. This is the highest resolution image of Eta Carinae taken by the NASA/ESA Hubble Space Telescope.

Crystal creates a supercontinuum breakthrough

Researchers have generated a wide range of colors from a single laser after discovering a new process for achieving so-called "supercontinuum generation."

Study says nocturnal ants have evolved night vision

(PhysOrg.com) -- Researchers studying the eyes of different Australian bull ants have found the first evidence of adaptation of visual structures within a single species to distinct light intensities.

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