Video: How Stars Destroyed Almost All the Atoms in the Universe

Video: How Stars Destroyed Almost All the Atoms in the Universe

Credit: W.M. Keck Observatory

On Thursday, May 10, 2012, Keck Observatory hosted a live webcast of an astronomy talk by Dr. Brian Siana of the University of California at Riverside. Below is the recording of that talk, which was delivered to a live audience at the Kahilu Theatre in Kamuela-Waimea, Hawaii. 

The first galaxies had an extraordinary impact on the young universe. Their ultraviolet light destroyed nearly all of the atoms in the cosmos. This process, called reionization, had severe consequences for galaxies trying to form thereafter. Unfortunately, we have no idea how it happened. In galaxies today ultraviolet light cannot escape, so the first galaxies must have been very different from those we see today. Dr. Siana will describe the quest to detect these first galaxies and their impact on the early universe.

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MOSFIRE and NIRC2-LGS are the instruments tonight. Observers are from CIT and CIT. Sun set 07:06:00pm rise 05:32:00am
Way to go CFHT! Faint galaxies in Virgo bit.ly/1FC5QvR
Tonight's schedule is MOSFIRE on Keck 1 and DEIMOS on Keck 2 for our lucky observers from CIT and CIT. Sun set 07:06:00pm rise 05:32:00am
The sky is ready for MOSFIRE and DEIMOS. Our observers from CIT and CIT are also ready. Sun set 07:05:00pm rise 05:32:00am
Keck 1 LRIS-ADC is scheduled with CIT observers. Keck 2 NIRSPEC is scheduled for CIT observers. Sun set 07:05:00pm rise 05:33:00am