One of the most prominent features of galaxies today is the manifestation of elegant spiral arms. We live in a beautiful grand-design spiral galaxy called the Milky Way. Our Solar System, including the Earth and the only life that we know, lies within the Orion spiral arm of our Milky Way galaxy. However, as we look back in time to the very early Universe, the frequency of spiral galaxies decreases dramatically. In fact, most galaxies in the distant past are messy and irregular in shape. Why is it so? When was the first appearance of spiral arms? How were they formed? In this talk, I will take us 11 billion years back in time through the distorted space surrounding nature's most massive structures. We will get a glimpse of earliest onset of spiral arms and directly witness the formation of a spiral galaxy that could later be home to billions of stars and planets like our earth. Presented on Friday 29 September 2017.
(Centre for Astrophysics and Supercomputing)
Free Astronomy Public Lectures
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