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Lecture 32: The Origin of the Solar System
How did the Solar System form? In this lecture I review the clues for
the formation of the solar system in the present-day dynamics (orbital
and rotation motions) and compositions of the planets and small bodies.
I then describe the standard accretion model for solar system formation,
whereby grains condense out of the primordial solar nebula, grains
aggregate by collisions into planetesimals, then gravity begins to work
and planetesimals grow into protoplanets. What kind of planet grows
depends on where the protoplanets form within the primordial solar
nebula: close to the Sun only rocky planets form, beyond the Frost Line
ices and volatiles can condense out allowing the growth of the gas and
ice giants. The whole process took about 100 million years, and we as
we explore the solar system in subsequent lectures, we will look for
traces of this process on the various worlds we visit. Recorded 2007
Nov 6 in 1000 McPherson Lab on the Columbus campus of The Ohio State
University.
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By Richard Pogge
4.8
8080 ratings
How did the Solar System form? In this lecture I review the clues for
the formation of the solar system in the present-day dynamics (orbital
and rotation motions) and compositions of the planets and small bodies.
I then describe the standard accretion model for solar system formation,
whereby grains condense out of the primordial solar nebula, grains
aggregate by collisions into planetesimals, then gravity begins to work
and planetesimals grow into protoplanets. What kind of planet grows
depends on where the protoplanets form within the primordial solar
nebula: close to the Sun only rocky planets form, beyond the Frost Line
ices and volatiles can condense out allowing the growth of the gas and
ice giants. The whole process took about 100 million years, and we as
we explore the solar system in subsequent lectures, we will look for
traces of this process on the various worlds we visit. Recorded 2007
Nov 6 in 1000 McPherson Lab on the Columbus campus of The Ohio State
University.
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