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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We are setting up MOSFIRE on Keck 1 for CIT observers, NIRC2-LGS on Keck 2 for UH observers. Sun set 06:37:00pm rise 06:32:00am
.@LindaLy79 Excellent question! Here is the best way to know: mkwc.ifa.hawaii.edu. It's dedicated just to Mauna Kea weather
CIT observers will work with MOSFIRE tonight. And UCI observers will work with DEIMOS. Sun set 06:36:00pm rise 06:33:00am
Observers from CIT will use MOSFIRE on Keck 1, while on Keck 2, UCI observers will use DEIMOS. Sun set 06:36:00pm rise 06:34:00am
On Keck 1, we have NASA observers using MOSFIRE. On Keck 2, we have CIT observers using DEIMOS. Sun set 06:35:00pm rise 06:34:00am