The era of reionisation (simulation)

A simulation of the era of reionisation. When the Universe cooled down after the Big Bang, about 13.7 billion years ago, electrons and protons combined to form neutral hydrogen gas. This cool dark gas was the main constituent of the Universe during the so-called Dark Ages, when there were no luminous objects. This phase eventually ended when the first stars formed and their intense ultraviolet radiation slowly made the hydrogen fog transparent again by splitting the hydrogen atoms back into electrons and protons, a process known as reionisation. This epoch in the Universe’s early history lasted from about 150 million to 800 million years after the Big Bang. This visualisation shows the progress of reionisation. Ionised regions are blue and translucent, ionisation fronts are red and white, and neutral regions are dark and opaque. See Alvarez et al. (2009) for more details on the simulations.


M. Alvarez (, R. Kaehler, and T. Abel

A proposito del video

Data di pubblicazione:Mercoledì 20 Ottobre 2010 19:00
Notizie relative:eso1041
Durata:01 m 06 s
Frame rate:30 fps

A proposito delll'oggetto

Tipo:Early Universe : Galaxy



Grande QT
16,6 MB


Podcast Video
11,5 MB
MPEG-1 medio
21,7 MB
Flash medio
14,8 MB


Flash piccolo
6,9 MB
QT piccolo
3,8 MB

For Broadcasters