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SEARCHING FOR PLANETS AND LIFE. SIMON GOODWIN Sheffield John Gribbin Sussex. 1995: 2005:. ONE. 150 PLANETS. THE PROBLEM WITH PLANETS…. …IS THEY’RE TOUGH TO SEE. A PLANET AROUND 51 PEG. EARTH FROM 30LYR. O3. CO2. H2O. IT’S LIFE JIM, BUT IT IS AS WE KNOW IT?. CARBON-BASED?.

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SEARCHING FOR PLANETS

AND LIFE

SIMON GOODWIN

Sheffield

John Gribbin

Sussex


1995:

2005:

ONE

150 PLANETS


THE PROBLEM WITH PLANETS…

…IS THEY’RE TOUGH TO SEE



EARTH FROM 30LYR

O3

CO2

H2O


IT’S LIFE JIM, BUT IT IS AS WE

KNOW IT?

CARBON-BASED?

WATER-BASED?

OXYGEN-USING?


IS LIFE COMMON?

LIFE APPEARED IN ~100MYR

BUT -

IS INTELLIGENT LIFE COMMON?

THAT TOOK ~4500MYR


THE FERMI PARADOX

60000 LYR

10 MYR TO COLONISE

THE GALAXY


GALACTIC ZOO?

INTERSTELLAR TRAVEL

IS TOO DIFFICULT?

NARROW WINDOW IN TIME?

SELF-DESTRUCT?

THEY’RE JUST NOT THERE?


THE GOLDILOCKS PLANET

‘COMET HOOVER’

THE MOON:

STABILISES AXIS

CAUSES TIDES (x2)

THIN CRUST

A QUIET SUN


ARE WE THE FIRST?

THE SUN IS VERY METAL

RICH FOR ITS AGE


WE ARE ONLY 10-20 YEARS AWAY

FROM DISCOVERING EARTH-LIKE

PLANETS AND MAYBE FINDING

LIFE ON THEM…


That s all

THAT’S ALL

(For now)


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