Institute of Astronomy

What heated up the Universe?

SpeakerTalk DateWeekly Handout
Girish Kulkarni7 December 2016
Additional Information
Group:Linton scouts
Weather:Partly Clear
Number of Visitors:175

Talk Summary

Fifty million years after the hot Big Bang that birthed it, the Universe was cold and dark.  It contained gas with temperature only a few degrees higher than absolute zero, and no luminous stars and galaxies.  But today, about 13.6 billion years later, the universe is bathed in light from stars in a variety of galaxies, and the gas is thousand times hotter. I will talk about our ongoing efforts to reveal the unexplored phase of cosmic evolution in which this transition from the cosmic dark ages to a Universe full of galaxies occurred.


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