Astronomers have known for decades that the universe is expanding. When they use telescopes to observe faraway galaxies, they see that these galaxies are moving away from Earth.
Astronomy
Nov 15, 2023
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70
This image from the Hubble Deep UV (HDUV) Legacy Survey encompasses 12,000 star-forming galaxies in a part of the constellation Fornax known as the GOODS-South field. With the addition of ultraviolet light imagery, astronomers ...
Astronomy
Dec 16, 2018
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111
Artificial materials containing arrays of metal nanostructures can interact with light in useful and interesting ways. One of the most interesting possible uses of such 'metamaterials' is to bend light around objects, rendering ...
Optics & Photonics
Oct 11, 2013
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(Phys.org) —A new semiconductor device capable of emitting two distinct colours has been created by a group of researchers in the US, potentially opening up the possibility of using light emitting diodes (LEDs) universally ...
Electronics & Semiconductors
May 3, 2013
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Three months after the flight of the solar observatory Sunrise – carried aloft by a NASA scientific balloon in early June 2013—scientists from the Max Planck Institute for Solar System Research in Germany have presented ...
Space Exploration
Sep 27, 2013
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Super-sharp observations with the telescope ALMA have revealed what seems to be a gigantic flare on the surface of Mira, one of the closest and most famous red giant stars in the sky. Activity like this in red giants—similar ...
Astronomy
May 29, 2015
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105
The English rock band Joy Division released their debut studio album "Unknown Pleasures" 40 years ago. The front cover doesn't feature any words, only a now iconic black and white data graph showing 80 wiggly lines representing ...
Astronomy
Jul 12, 2019
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376
New research by Columbia Engineering demonstrates remarkable optical nonlinear behavior of graphene that may lead to broad applications in optical interconnects and low-power photonic integrated circuits. With the placement ...
Optics & Photonics
Jul 15, 2012
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A team of researchers has built an intelligent sensor—the size of about 1/1000 of the cross-section of a human hair—that can simultaneously detect the intensity, polarization and wavelength of light, tapping into the ...
Optics & Photonics
May 17, 2022
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294
Terahertz (THz) radiation—radiation in the wavelength range of 30 to 300 microns—is gaining attention due to its applications in security screening, medical and industrial imaging, agricultural inspection, astronomical ...
General Physics
Oct 9, 2013
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