Reference Terms
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X-ray
X-rays are a form of electromagnetic radiation with a wavelength in the range of 10 to 0.1 nanometers, corresponding to frequencies in the range 30 to 3000 PHz.
Note: The above text is excerpted from the Wikipedia article "X-ray", which has been released under the GNU Free Documentation License.
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Space & Time News
May 28, 2024
May 23, 2024 Researchers have now seen the formation of three of the earliest galaxies in the universe, more than 13 billion years ago. The sensational discovery contributes important knowledge about the ...
May 23, 2024 The first scientific pictures from the Euclid satellite mission have revealed more than 1,500 billion orphan stars scattered throughout the Perseus cluster of ...
May 23, 2024 While thousands of planets have been discovered around other stars, relatively little is known about them. A NASA catalog featuring 126 exotic, newly discovered worlds includes detailed measurements that allow for comparisons with our own solar ...
May 23, 2024 Astronomers have made the rare and tantalizing discovery of an Earth-like exoplanet 40 light-years away that may be just a little warmer than our own world. The potentially-habitable planet, named Gliese 12 b, orbits its host star every 12.8 days, ...
Latest Headlines
updated 12:56 pm ET
May 23, 2024 Astronomers have discovered a planet between the sizes of Earth and Venus only 40 light-years ...
May 22, 2024 Surprise findings suggest sunspots and solar flares could be generated by a magnetic field within the Sun's outermost layers. If confirmed, the findings could help scientists better predict space ...
May 22, 2024 Astronomers have a new way to measure how fast a black hole spins, by using the wobbly aftermath from its stellar feasting. The results offer a new ...
May 21, 2024 Researchers have for the first time been able to pin down a prehistoric settlement of early farmers in northern Greece dating back more than 7,000 years to the year. For this they combined annual ...
May 21, 2024 University of Copenhagen astrophysicists help explain a mysterious phenomenon, whereby stars suddenly vanish from the night sky. Their study of an ...
May 20, 2024 A surprisingly low amount of methane and a super-sized core hide within the cotton candy -- like planet WASP-107 ...
May 15, 2024 Looking like a glittering cosmic geode, a trio of dazzling stars blaze from the hollowed-out cavity of a reflection nebula in a new image from NASA's Hubble Space Telescope. The triple-star system is ...
May 15, 2024 SuperLimbs, a system of wearable robotic limbs, can physically support an astronaut and lift them back on their feet after a fall, helping them conserve energy for other essential ...
May 15, 2024 Astronomers have just discovered a new Earth-sized exoplanet around SPECULOOS-3, an 'ultracool dwarf' star as small as Jupiter, twice as cold as our ...
May 14, 2024 Astronomers have just discovered WASP-193b, an extraordinarily low-density giant planet orbiting a distant Sun-like ...