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18 ore fa · A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it. [2] Einstein 's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
1 giorno fa · aurora, luminous phenomenon of Earth’s upper atmosphere that occurs primarily in high latitudes of both hemispheres; in the Northern Hemisphere auroras are called aurora borealis, aurora polaris, or northern lights, and in the Southern Hemisphere they are called aurora australis or southern lights.
- The Editors of Encyclopaedia Britannica
1 giorno fa · A phenomenon of instability that occurs occasionally in an atmospheric layer within which wind speed increases rapidly with altitude. Kelvin–Helmholtz waves form in this layer of strong vertical wind shear, and are often marked by a distinct train of clouds that resemble breaking ocean waves. khamsin. Also chamsin, hamsin, and khamaseen.
4 giorni fa · Updated 7:52 PM PDT, May 28, 2024. NEW YORK (AP) — Twice per year, New Yorkers and visitors are treated to a phenomenon known as Manhattanhenge, when the setting sun aligns with the Manhattan street grid and sinks below the horizon framed in a canyon of skyscrapers.
2 giorni fa · Narration. "Phenotype" simply refers to an observable trait. "Pheno" simply means "observe" and comes from the same root as the word "phenomenon". And so it's an observable type of an organism, and it can refer to anything from a common trait, such as height or hair color, to presence or absence of a disease. Frequently, phenotypes are related ...
4 giorni fa · When and where will the double cicada brood emerge? Here's what to expect from this rare phenomenon, which occurs only once every 221 years.
3 giorni fa · Discover fascinating facts about reflection, from the way light bounces off surfaces to how mirrors create optical illusions. Explore the physics behind this captivating phenomenon.
