journey through space and time. who am i? what do i do?
TRANSCRIPT
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Journey through SPACE and TIME
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Who Am I?
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What do I do?
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1. Journey through space2. Journey through time
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Destination 1 Nearest neighbour: the Moon
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QuickTime™ and a decompressor
are needed to see this picture.
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Space travel: speed?
Cruising speed ~ 500Mph
Cruising speed ~ 17000Mph
Bristol to florida in 12 mins!
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How long do you think it takes to get from Earth to the Moon?
250000 miles
15 hours in our shuttle
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Destination 2 Nearest star...
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Sol?
AlphaCentauri?
Betelgeuse? ProximaCentauri?
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Why does the Sun shine?
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Nuclear FUSIONReleases more energyHarder to control!
Nuclear FISSION:Splitting the atom
CONNECTION???
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Destination 3 Nearest planet?
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?
???
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Earth
Mercury
MarsThe Sun
Venus
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Mars-Earth closest approach27 August 2003
35 million miles!
In our space shuttle...86 days!
In reality...MRO took 7 months...
QuickTime™ and aTIFF (Uncompressed) decompressor
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Fly over the Martian surface
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We need to put our foot down!
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Solar System Fly-by
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Jupiter:largest planet
63+ moons!
Picture: Voyager 1979
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Saturn
Everyone’s favorite!
Picture: Cassini 2004
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Uranus:
Also a gas giantSpins on its side!
Picture: Voyager 2 1979
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Neptune:
Also a gas giantUranus’ twin!
Picture: Voyager 2 1979
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Pluto???
QuickTime™ and aTIFF (Uncompressed) decompressor
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Relative sizes
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Escaping the Solar System...
Pluto is 3660 million miles away...
It will take us 25 years!
Upgrade...Light speed: 670 million MPH5 hours to get to pluto!
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Destination4 Nearest star: Proxima Centauri
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Travel Time:4 Years, at light speed!
ProximaCentauri
Nearest star with planets:Epsilon Eridani
10 Years, at light speed!
(400,000 yrs in a shuttle...)
?
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Ever seen this?
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You are here!
100 billion stars
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Destination 5 Centre of the Galaxy
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What will we find?
26,000 years...
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BLACK HOLE!!!
Death of star: supernova
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How do we know ??
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impressive Black Holes
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Stars
CMB
AGN
Planets
GalaxiesGalaxies
ClustersClusters Clusters
RE
DS
HIF
T
Stars
CMB
AGN
Planets
GalaxiesGalaxies
ClustersClusters ClustersDIS
TA
NC
E F
RO
M U
S
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Destination 6 Andromeda Galaxy
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Closest similar galaxyLargest in local group
2.5 million light years away
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Zoom out: Hubble Deep field
A 2 millionth of the sky!!!
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Galaxy cluster OPTICAL light
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Stars
CMB
AGN
Planets
GalaxiesGalaxies
ClustersClusters Clusters
RE
DS
HIF
T
Stars
CMB
AGN
Planets
GalaxiesGalaxies
ClustersClusters ClustersDIS
TA
NC
E F
RO
M U
S
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Galaxy cluster X-rays
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Galaxy cluster Radio waves
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Zoom out again -galaxies form filaments and voids
The whole Universe is made up this way
Time for us to go home...
Fly through the cosmic web
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zoom back to Earth...
QuickTime™ and a decompressor
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1. Journey through space2. Journey through time
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IN THE BEGINNING...
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EVERYTHING!
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EVERYTHING!
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EVERYTHING!
ENERGY INCREASING, BECOMING LIKE A BOMB...
STARTS EXPANDING...
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Tick tick tick...
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BOOM!
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The Big Bang
Not really an explosion, Universe expanded rapidly as a whole
(Universe is still expanding today as a result of the Big Bang)
Matter was created in the form of tiny particles (protons, neutrons, electrons)
Too hot for normal stuff to form (eg atoms, molecules)
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COSMIC SOUP
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PROTONNEUTRON
ELECTRON
COSMIC SOUP
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Universe much cooler, atoms start to form...
Hydrogen, Helium, normal stuff
300,000 Years Later...
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Universe is now a GAS
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HYDROGEN
HELIUM
Universe is now a GAS
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GRAVITY!
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Gravitational Collapse
We started with a uniform gasSmall regions became more denseThe denser regions had larger gravity and started to pull other particles towards them
The gaseous Universe began to look clumpy
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Stars, galaxies
Temperature increases
FUSION!
A star is born
Stars congregate Together to formGalaxies.. Galaxies Also congregate...
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The Universe today
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Future?
The Universe is still expanding
All galaxies are moving apart The explosion of the big bang is still happening!
It may contine expanding forever
Or is may stop expanding, and fall inwards in a big CRUNCH!
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THE END