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.

Filter

Filter by year OR type:

View all

Twitter

The sky is ready for MOSFIRE and DEIMOS. Our observers from CIT and UCI are also ready. Sun set 05:52:00pm rise 06:27:00am
Keck 1 MOSFIRE is scheduled with Subaru observers. Keck 2 DEIMOS is scheduled for UCI observers. Sun set 05:52:00pm rise 06:26:00am
We are setting up MOSFIRE on Keck 1 for Subaru observers, DEIMOS on Keck 2 for UCI observers. Sun set 05:52:00pm rise 06:25:00am
CIT observers will work with MOSFIRE tonight. And CIT observers will work with DEIMOS. Sun set 05:52:00pm rise 06:25:00am
Observers from CIT will use MOSFIRE on Keck 1, while on Keck 2, CIT observers will use DEIMOS. Sun set 05:52:00pm rise 06:24:00am