Descubren nuevas pistas de cómo se produce la expansión del universo
Hace aproximadamente un siglo, los astrónomos observaron que las galaxias lejanas parecían alejarse de nosotros. De hecho, cuanto más distante es una ...
TL;DR
- The universe's expansion, first observed a century ago, is being accelerated by dark energy.
- The Dark Energy Survey (DES) collaboration combined six years of data from gravitational lensing and galaxy clustering for new measurements.
- This is the first time DES has combined four different measures of dark energy: BAO, Type Ia supernovae, galaxy clusters, and weak gravitational lensing.
- The new, more precise measurements reduce the possibilities for models of the universe's evolution.
- DES used the DECam camera on the Blanco telescope to map 669 million galaxies over six years.
- Accurate distance calibration of galaxies is crucial for interpreting the observed distribution and understanding dark energy.