Enrico Ramirez-Ruiz: Your body was forged in the spectacular death of stars
Looking not at the heavens but at computer models, Enrico Ramirez-Ruiz studies some of the most powerful explosions since the birth of the universe. Full bio
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the cosmic history
of modern astronomy
were actually put together.
of the big bang,
the oxygen we're breathing,
and transform them into heavier ones,
with these heavy elements.
heavier than hydrogen and helium,
that manufactured them in their interiors
all across the Milky Way,
stellar mortician.
that starts in a supernova explosion
that we're breathing right now.
consists of only four elements:
of this cosmic tale is oxygen.
of our bodies made of oxygen,
fighting to protect life on earth.
in the universe
over the entire history of the universe
signal the demise of very massive stars.
can be brighter than an entire galaxy
burn brighter
compared to other stars.
the lifeblood of all stars,
of all the energy on earth.
as these fusion factories
by smashing atoms together
eight times the mass of the sun
their helium in their cores.
is left with a carbon core,
is the building block of life.
the temperature increases,
nuclear reactions to take place,
bound nuclei in the universe,
extract energy by burning iron.
of the massive star is made of iron,
bad day for a star.
but to collapse,
the size of a sugar cube.
the core actually resists collapse,
bounces off the core.
of a second or so,
the rest of the star in all directions,
of an astrophysicist,
of these exploding stars
we're not able to do that.
computer simulations
these complex phenomena.
to really understand how gas behaves
fundamental questions
the massive star?"
can be reversed into an explosion?"
of debate in the field,
elementary particles,
one of those simulations.
once the core collapses.
the energy in this core.
of disrupting the star.
that a shock wave is produced
goes and disrupts the entire star.
where elements are produced.
than the sun will in its entire lifetime.
where the massive star has died.
once every 50 years,
in the universe,
every second or so.
relatively close to earth.
recorded these supernova explosions
that gave rise to the Crab Nebula.
recorded this supernova in 1054,
Native Americans.
about 5,600 light-years away from earth.
during the day.
for about two years in the night sky.
and what do we see?
that were blasted by the explosion,
for us to understand
by the Hubble Space Telescope
to astronomers
the chemical legacy
are the tattered remains of the star,
filaments that you see
like the Crab Nebula,
was produced by supernova explosions
all the atoms of oxygen in our body,
of a 100 million supernova.
or at least the majority of it,
supernova explosions.
extreme conditions
the thought experiment.
and a supernova happens.
to be assembled in a cloud.
and caused it to collapse,
and the solar system.
and stellar rebirth.
of atoms in the universe.
and chemistry are intimately connected.
to inhale the waste products of plants.
of supernova explosions.
has just gone into your body.
in the interior of a star
by a supernova explosion.
the entire solar system
of oxygen every day.
in front of this beautiful audience,
your oxygen atoms.
that once resided in me.
beautiful exchange of atoms.
once belonged to Frida Kahlo?"
belonged to Marie Curie,
with cosmic history,
by sharing a myth
Mesoamerican culture.
was assembled in the heavens.
into tons of different pieces.
opportunity of growth.
were scattered on earth
you will become more complete.
that have these huge pieces
every single one of those pieces."
of oxygen to me.
in a supernova explosion,
have embarked on an epic odyssey,
to mere centuries,
ABOUT THE SPEAKER
Enrico Ramirez-Ruiz - Astrophyscist, stellar morticianLooking not at the heavens but at computer models, Enrico Ramirez-Ruiz studies some of the most powerful explosions since the birth of the universe.
Why you should listen
Enrico Ramirez-Ruiz is eager to understand our origins and, in some cases, is simply wild about things that go bang in the night sky. He works with computer models to understand the cataclysmic death of stars and recently led efforts to uncover the origin of the heaviest, most neutron-rich elements in the universe, like gold and uranium. Ramirez-Ruiz tests out his theories with complex computer simulations that defy the boundaries of human experience and the assumptions we make about the universe.
Ramirez-Ruiz was born in Mexico, studied physics at the Universidad Nacional Autónoma de México, and pursued his PhD at Cambridge University. He was the John Bahcall Fellow at the Institute for Advanced Study at Princeton before joining the faculty at UCSC, where he is a professor of astrophysics and astronomy. He has received awards from the American Physical Society, the American Astronomical Society, the David and Lucile Packard Foundation, Mexcian Academy of Sciences and the Radcliffe Institute for Advanced Study at Harvard University, and he is the Niels Bohr Professor at the University of Copenhagen, funded by the Danish National Research Foundation. Ramirez-Ruiz is the inaugural holder of the Vera Rubin Presidential Chair for Diversity in Astronomy, which was in part funded by the Heising-Simons Foundation.
Enrico Ramirez-Ruiz | Speaker | TED.com