Archivo de etiquetas: física
Por qué nuestra improbable existencia no apoya la idea del multiverso
Los teóricos de la probabilidad han identificado una falacia lógica en el argumento habitualmente usado para resolver el problema del ajuste fino a partir de la existencia de muchos universos.
Physicists Observe Fleeting ‘Polaron’ Quasiparticles For The First Time
Polarons are important nanoscale phenomena: a transient configuration between electrons and atoms (known as quasiparticles) that exist for only trillionths of a second.
¿A qué velocidad rota el agujero negro central de la Vía Láctea?
El agujero negro supermasivo del centro de la Vía Láctea parece que rota despacio, según un análisis basado en las estrellas más cercanas a él.
Milliseconds measure galactic gravity
Data from pulsars widens knowledge of dark matter and gravitational waves.
¿Cómo mueren las galaxias?
El hallazgo de una galaxia distante que se encuentra expulsando ingentes cantidades de gas podría obligar a reconsiderar por qué las grandes galaxias dejan de formar nuevas estrellas.
After decades of effort, scientists are finally seeing black holes—or are they?
The observations are already challenging astrophysicists’ assumptions about how black holes form and influence their surroundings. The smaller black holes detected by LIGO and, now, the European gravitational wave detector Virgo in Italy have proved heavier and more varied than expected, straining astrophysicists’ understanding of the massive stars from which they presumably form. And the environment around the supermassive black hole in our Galaxy appears surprisingly fertile, teeming with young stars not expected to form in such a maelstrom. But some scientists feel the pull of a more fundamental question: Are they really seeing the black holes predicted by Einstein’s theory?
The science events to watch for in 2021
Climate change and COVID-19 vaccines are among the themes set to shape research.
Astronomers Get Their Wish, and a Cosmic Crisis Gets Worse
We don’t know why the universe appears to be expanding faster than it should. New ultra-precise distance measurements have only intensified the problem.
Is lightning striking the Arctic more than ever before?
Team detects a huge increase and says it could be due to climate change, but others can’t confirm the findings.
The New History of the Milky Way
Over the past two years, astronomers have rewritten the story of our galaxy.