journey through space and time. who am i? what do i do?

Journey through SPACE and TIME

Who Am I?

What do I do?

1. Journey through space2. Journey through time

Destination 1 Nearest neighbour: the Moon

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Space travel: speed?

Cruising speed ~ 500Mph

Cruising speed ~ 17000Mph

Bristol to florida in 12 mins!

How long do you think it takes to get from Earth to the Moon?

250000 miles

15 hours in our shuttle

Destination 2 Nearest star...

Sol?

AlphaCentauri?

Betelgeuse? ProximaCentauri?

Why does the Sun shine?

Nuclear FUSIONReleases more energyHarder to control!

Nuclear FISSION:Splitting the atom

CONNECTION???

Destination 3 Nearest planet?

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???

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Earth

Mercury

MarsThe Sun

Venus

Mars-Earth closest approach27 August 2003

35 million miles!

In our space shuttle...86 days!

In reality...MRO took 7 months...

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Fly over the Martian surface

We need to put our foot down!

Solar System Fly-by

Jupiter:largest planet

63+ moons!

Picture: Voyager 1979

Saturn

Everyone’s favorite!

Picture: Cassini 2004

Uranus:

Also a gas giantSpins on its side!

Picture: Voyager 2 1979

Neptune:

Also a gas giantUranus’ twin!

Picture: Voyager 2 1979

Pluto???

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Relative sizes

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!

Destination4 Nearest star: Proxima Centauri

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?

You are here!

100 billion stars

Destination 5 Centre of the Galaxy

What will we find?

26,000 years...

BLACK HOLE!!!

Death of star: supernova

How do we know ??

impressive Black Holes

Stars

CMB

AGN

Planets

GalaxiesGalaxies

ClustersClusters Clusters

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Stars

CMB

AGN

Planets

GalaxiesGalaxies

ClustersClusters ClustersDIS

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Destination 6 Andromeda Galaxy

Closest similar galaxyLargest in local group

2.5 million light years away

Zoom out: Hubble Deep field

A 2 millionth of the sky!!!

Galaxy cluster OPTICAL light

Stars

CMB

AGN

Planets

GalaxiesGalaxies

ClustersClusters Clusters

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DS

HIF

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Stars

CMB

AGN

Planets

GalaxiesGalaxies

ClustersClusters ClustersDIS

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Galaxy cluster X-rays

Galaxy cluster Radio waves

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

zoom back to Earth...

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1. Journey through space2. Journey through time

IN THE BEGINNING...

EVERYTHING!

EVERYTHING!

EVERYTHING!

ENERGY INCREASING, BECOMING LIKE A BOMB...

STARTS EXPANDING...

Tick tick tick...

BOOM!

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)

COSMIC SOUP

PROTONNEUTRON

ELECTRON

COSMIC SOUP

Universe much cooler, atoms start to form...

Hydrogen, Helium, normal stuff

300,000 Years Later...

Universe is now a GAS

HYDROGEN

HELIUM

Universe is now a GAS

GRAVITY!

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

Stars, galaxies

Temperature increases

FUSION!

A star is born

Stars congregate Together to formGalaxies.. Galaxies Also congregate...

The Universe today

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!

THE END