Researchers have designed and demonstrated two all-silicon terahertz metasurface devices that can be used to create four optical channels for simultaneously implementing different optical functions. This capability could ...
Optics & Photonics
Mar 1, 2023
0
90
It is well known that the expansion of the universe is accelerating due to a mysterious dark energy. Within galaxies, stars also experience an acceleration, though this is due to some combination of dark matter and the stellar ...
Astronomy
Jan 11, 2021
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4848
Boeing is beefing up its investments in autonomous and electric hybrid planes in anticipation that aviation could be primed for as much disruption as virtually every other sector.
Engineering
Oct 6, 2017
1
32
Aviation experts estimate that every commercial airplane in the world is struck by lightning at least once per year. Around 90 percent of these strikes are likely triggered by the aircraft itself: In thunderstorm environments, ...
Engineering
Mar 9, 2018
0
170
Solar Impulse 2, an experimental aircraft flying around the world to draw attention to clean energy technologies, is to take flight again on Monday, organizers said.
Energy & Green Tech
May 2, 2016
0
468
The United States is planning a new launch of its tiny, pilotless military space plane on Tuesday as part of a futuristic Air Force program that has fueled speculation over its mission.
Space Exploration
Dec 10, 2012
2
0
From high above Saturn's northern hemisphere, NASA's Cassini spacecraft gazes over the planet's north pole, with its intriguing hexagon and bullseye-like central vortex.
Space Exploration
Jun 6, 2017
0
15
(AP) -- An unmanned Air Force space plane resembling a small space shuttle has been launched on its maiden voyage into orbit, carried aloft aboard an Atlas 5 rocket Thursday evening, the service announced.
Space Exploration
Apr 23, 2010
9
0
On Aug. 19, National Aviation Day, a lot of people are reflecting on how far aviation has come in the last century. Could this be the future – a plane with many electric motors that can hover like a helicopter and fly like ...
Energy & Green Tech
Aug 20, 2014
2
0
Saturn's main rings, along with its and moons, are much brighter than most stars. As a result, much shorter exposure times (10 milliseconds, in this case) are required to produce an image and not saturate the detectors of ...
Space Exploration
Jul 19, 2016
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