This BBC podcast is supported by ads outside the UK.
There was such a excitement and energy about this moment.
It opened the door for everything that rapidly followed.
Witness history.
History as told by the people who were there.
I was walking in space.
The first man ever to do so.
I felt almost insignificant.
like a tiny ant compared to the immensity of the universe.
Today it's a bit of a dream show for me because I get to talk about physics and wine.
It doesn't get much better than that.
My guest is a Nobel Prize-winning astronomer who,
through the proverbial cat amongst the pigeons in the late 1990s, when he announced that,
contrary to long-held belief in cosmology, the expansion of the universe is speeding up,
with everything around us moving further and further away.
We'll unpack that rather isolating thought in a moment.
Brian Schmidt is a distinguished professor of astrophysics at the Australian National University,
known for his work on supernovae,
massive explosions that take place when stars come to the ends of their lives.
They're among the most energetic events in the universe and incredibly difficult to find.