Tag archive: física
Color-Changing Material Unites the Math and Physics of Knots
Mathematicians have studied knots for centuries, but a new material is showing why some knots are better than others.
Una enana blanca que al rotar arrastra el espaciotiempo
Unas observaciones recientes han confirmado el efecto Lense-Thirring: el arrastre del espaciotiempo por una masa que rote, según predice la teoría de la relatividad general.
Argitu dute zein den marka guztiak hautsi dituen supereroalearen misterioa
Fisikaren erronkarik handienetakoa da giro-tenperaturan eta giro-presioan supereroaleak diren materialak aurkitzea. Oraingoz, LaH10 da marka guztiak hautsi dituena, -23 ºC eta 130 gigapascaletan baita supereroalea, inoizko tenperaturarik altuenean eta presiorik baxuenean (nahiz eta, oraindik, presio atmosferikoa baino milioi bat aldiz presio handiagoa den). Lorpen horrek zeharo harritu zituen zientzialariak 2019an, kalkulu teorikoen arabera, ez baitzegoen aurreikusia hain presio txikitan lor zitekeenik. Ion Errea Lope fisikari donostiarraren taldeak eta kolaboratzaileek, ordea, azalpena eman diote esperimentalki ikusitako horri. Are gehiago, etorkizunean presio baxuagoko material supereroaleak identifikatzeko oinarriak ezarri dituzte.
The Grand Unified Theory of Rogue Waves
Rogue waves — enigmatic giants of the sea — were thought to be caused by two different mechanisms. But a new idea that borrows from the hinterlands of probability theory has the potential to predict them all.
Could a habitable planet orbit a black hole?
Supermassive black holes have a reputation for consuming everything in their path, from gas clouds to entire solar systems. So is there any way aliens could live on a world that actually orbited one of these cosmic beasts? Surprisingly, the answer is a tentative yes, researchers say, although there are plenty of reasons why life could never take hold in such a place. If it did, living on such a planet would be truly surreal, with the black hole filling nearly half the sky and concentrating leftover photons from the big bang into a pseudosun.
These Images Show the Sun’s Surface in Greater Detail Than Ever Before
A new telescope in Hawaii takes aim at our nearest star and its mysteries.