Astrochemisty: Putting the Astro in Astrobiology - Alexander Tielens (SE...
Δημοσιεύτηκε στις 23 Οκτ 2015
Astrobiology,
the study of emergence of life and the its distribution in the
Universe, addresses the most fundamental questions in science: "How does
life begin ?" and "Are we alone ?" Over the last 20 years, we have
discovered that planets are bountiful in the galaxy and that one in
every five solar-type stars has a planet in the habitable zone. We have
learned that extremophiles have spread to essential every niche – even
the seemingly most inhospitable ones – on our planet. And we have
learned that life started essentially as soon as conditions permitted,
within some 200 million of the late heavy bombardment, or perhaps even
earlier. This has resulted in a paradigm shift from "Life on Earth is
unique" to the premise "life is widespread". As a result, searching for
biosignatures in space has taken on a life by itself. In this talk, Dr.
Tielens will summarize this shift in our thinking and the global
processes that may have influenced the first steps towards life.
The
focus in this talk will be on astrochemistry – the starting point of
astrobiology – the chemical evolution that takes place in space where
simple molecules are transformed into complex molecules and complex
molecules are broken down to simple ones. This chemical dance of the
elements produces a wide variety of organic compounds. I will review the
processes that drive this chemical evolution in space, particularly in
regions of star and planet formation.
The focus will be on
understanding the raw materials that are delivered to newly formed
planets and their relationship to the building blocks from which
prebiotic material was formed and biological systems evolve.
the study of emergence of life and the its distribution in the
Universe, addresses the most fundamental questions in science: "How does
life begin ?" and "Are we alone ?" Over the last 20 years, we have
discovered that planets are bountiful in the galaxy and that one in
every five solar-type stars has a planet in the habitable zone. We have
learned that extremophiles have spread to essential every niche – even
the seemingly most inhospitable ones – on our planet. And we have
learned that life started essentially as soon as conditions permitted,
within some 200 million of the late heavy bombardment, or perhaps even
earlier. This has resulted in a paradigm shift from "Life on Earth is
unique" to the premise "life is widespread". As a result, searching for
biosignatures in space has taken on a life by itself. In this talk, Dr.
Tielens will summarize this shift in our thinking and the global
processes that may have influenced the first steps towards life.
The
focus in this talk will be on astrochemistry – the starting point of
astrobiology – the chemical evolution that takes place in space where
simple molecules are transformed into complex molecules and complex
molecules are broken down to simple ones. This chemical dance of the
elements produces a wide variety of organic compounds. I will review the
processes that drive this chemical evolution in space, particularly in
regions of star and planet formation.
The focus will be on
understanding the raw materials that are delivered to newly formed
planets and their relationship to the building blocks from which
prebiotic material was formed and biological systems evolve.
Κατηγορία
Άδεια
- Τυπική άδεια YouTube
ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 24/12/2015
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