Beyond the Edge of the Universe: A Tale Through Space and Time, A Journey Spanning Over 93 Billion Light Years. The human mind is always drawn towards the unknown. It is incredibly frightening, but from time and again, curiosity burns the will to explore beyond. Let me take you all on a journey into the abyss that this universe is, a place where darkness itself fears to exist. Travelling across the universe isn’t just travelling through space, but through time as well. Before we get started, let's look into some facts. To find the edge, we should first know the dimensions of the universe. Our universe is expected to be 13.772 billion years old, quite old isn’t it? So how big is our universe really? Scientists today estimate it to be 28.5 Giga-Parsecs in width. To get a grasp of how huge that actually is, let us get to the basics of astronomical units.
How large is a Parsec?
To understand how a parsec is defined, you should first know what an astronomical unit (AU) is. 1 AU is essentially the average distance between the sun and the earth (approximately 150 million km). So a parsec is defined as the longest length of a triangle whose shortest side is 1 AU and which subtends an angle of one arc second at the opposite vertex.
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Viascience: quantum mechanics 2 - photons
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