Hiranya Peiris
speaker
454 appearances
2 recordings
2 series
first heard May 2026
last heard 25 May
Hiranya Peiris’s voice in public audio — every appearance, attributed to the second.
Trend
recordings per month · last 12 monthsRecordings per month over the last 12 months — 2 in all, peaking in May 2026 with 2.
Appearances
And we could also measure when this early light came from.
It comes from a time when the universe was about 380,000 years old.
So this is like a baby picture of the universe.
That's correct.
We can therefore tell a story about the evolution of the universe, at least from that early age till now.
Yeah, it's a simple model, but it's a really bizarre one.
It is described by just six numbers.
So we need two numbers to describe the origin of cosmic structure.
Where did everything come from?
Then we have three numbers to describe how it's evolving.
So that's the amount of ordinary matter in the universe.
Everything our world is made of, what we are made of, that's ordinary matter.
It's only 5%.
And then there is dark matter and dark energy, which are very mysterious components of the universe.
The 95%, we can see that they're there, but it's not like anything we know.
And then the geometry of the universe, which tells you something about its fate.
And then we also need to know when the first stars formed in order to describe the universe.
That's right.
In a tiny fraction of a second, so like a trillionth of a trillionth of a trillionth of a second, the universe expanded by a factor of about 10 to the power 30.
That's right.
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