View Full Version : Hubble: Helium Reionization Was a Hot Time in the Ol’ Universe

2010-Oct-07, 05:30 PM
Using Hubble’s newest tool, the Cosmic Origins Spectrograph (COS), researchers have nailed down and enhanced our understanding of the reionization of helium in the Universe, clarifying the time frame of 11.7 to 11.3 billion years ago when the universe stripped electrons off from primeval helium atoms. Hubble scientists say it was the equivalent of global [...]

More... (http://www.universetoday.com/75234/hubble-helium-reionization-was-a-hot-time-in-the-ol-universe/)