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The blue field entoptic phenomenon is an entoptic phenomenon characterized by the appearance of tiny bright dots (nicknamed blue-sky sprites) moving quickly along undulating pathways in the visual field, especially when looking into bright blue light such as the sky. [ 1] The dots are short-lived, visible for about one second or less, and ...
Citizen scientists spotted an object zipping through the Milky Way at more than 1 million miles an hour, and a new study shows it could be a rare hypervelocity star. An unusual object is moving so ...
T Coronae Borealis, also called the Blaze Star, is actually two stars — a hot, dense white dwarf, and a cooler red giant. The dwarf star, which ran out of fuel long ago and collapsed to roughly ...
Superluminal motion. In astronomy, superluminal motion is the apparently faster-than-light motion seen in some radio galaxies, BL Lac objects, quasars, blazars and recently also in some galactic sources called microquasars. Bursts of energy moving out along the relativistic jets emitted from these objects can have a proper motion that appears ...
The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science, more specifically in the psychophysics of visual perception. A traditional term for "flicker fusion" is "persistence ...
Apophis to make 2029 flyby to Earth. Apophis is projected to pass within 20,000 miles of our planet’s surface on April 13, 2029. For the superstitious lot, yes, that's a Friday, no less. On that ...
Garland, No. 22-666, 601 U.S. ___ (2024) The Real ID Act of 2005 (stylized as REAL ID Act of 2005) is an Act of Congress that establishes requirements that driver licenses and identification cards issued by U.S. states and territories must satisfy to be accepted for accessing federal government facilities, nuclear power plants, and for boarding ...
3. Cosm insists this is not a theater "We're allergic to the term theater," Poolman says. Cosm's creators want the spaces to feel social. That's why they also sell a low-priced general admission ...