Imagine This
How did the universe start?
Jun 20, 2023
Professor Brian Schmidt, a Nobel Prize-winning astrophysicist, joins the conversation to explore the origins of the universe. He delves into the awe-inspiring journey from the Big Bang to the formation of stars and galaxies. The discussion touches on whimsical theories, like the universe being the result of a giant seed or a cosmic flatulence, before grounding itself in scientific explanation. Schmidt emphasizes our profound connection to the cosmos, revealing that the elements in our bodies were forged in stars, highlighting the interconnectedness of all existence.
15:20
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Quick takeaways
- The universe began with the Big Bang approximately 13.8 billion years ago, marking the inception of space and time.
- Light from distant stars allows us to observe the universe's expansion, enabling us to look back in time to its origins.
Deep dives
The Nature of the Universe
The universe is described as the largest, oldest, and most expansive entity that exists, encompassing everything from stars to galaxies. It is constantly expanding, which suggests that all matter was once concentrated in a very small space before the Big Bang. This phenomenon of expansion means that as we observe distant stars and galaxies, we are essentially looking back in time, seeing their light that has traveled across vast distances. The concept of light years helps illustrate this, as the time it takes for light to reach us from various celestial objects determines how far back in time we can see.
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