How did we get here David Byrne, Talking Heads

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How did we get here? David Byrne, Talking Heads
Evolution of the solar system and formation
of the planets
How long ago? Age of the Universe about 13.7
by ( 0.2
by) Age of the Milky Way Galaxy 13.6 by Age of
the Sun about 5 by Age of planet Earth about
4.5 by
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A spiral galaxy similar to our own
56,000 light years across 62 million light years
away
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Whats a light year?
186,000 miles / second X
60 seconds / minute X
60 minutes / hour 6.7 x
108 miles / hour
67 x 107 miles / hour
670 x 106 miles / hour
or 670 million miles / hour
X 24 hours / day X 365 days / year

5.8 x 1012 miles / year
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The Milky Way Galaxy (center)
At least 200 billion stars possibly 400
billion 100,000 light years across 3.6 billion
years old
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125 Billion Galaxies
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The structure of the Universe
Galaxies organized into clusters and superclusters
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Creating a star
Stellar nurseries in a nebula
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Areas of intense star formation
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The Crab Nebula
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Igniting a star
Enough gas (mostly hydrogen) is pulled
together by gravity to form a dense mass
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The star as a fusion reactor
Four protons (nucleus of hydrogen atoms)
under extreme pressure are pressed together to
create a helium nucleus this releases a
tremendous amount of energy as heat and
radiation
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The interior of the star
also produces heavier elements Important
for the formation of planets Fe iron Si
silicon Mg magnesium O oxygen
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A star explodes supernova
Hydrogen is used up Star collapses then
explodes Enormous pressure wave scatters
dust and gas
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Iron from the star is critical for creating
new planets
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Pre-Solar Nebula
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Beginning of the Solar System
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Orion Proto-Planetary Disk
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Proto-planetary disks
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Disk seen edge-on
Light of the star reflecting off disk
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Accretion lumps form
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Process of accretion
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Process of accretion
planetesimals
protoplanet
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Taurus disk
200 known planets outside our solar
system Several known multi-planet
systems Estimated 10 billion Earths in
Milky Way Galaxy
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Asteroid belt
Similar to planetesimals
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Asteroids
Many impacts
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Small rocky bodies
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The gas giants
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Gravitational lens
Warping space-time
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Earth and Moon
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Creating the moon
Earth struck by another body, possibly as
large as Mars
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Hot blobs in space
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Violent early history
Earth was also pummeled
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Basalt flows to the surface
Molten interior
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Interiors of the Earth and Moon
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End of a stars life
Expansion, burnout
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the end
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Gravitational lens