Transcript SEARCHING FOR PLANETS AND LIFE SIMON GOODWIN Sheffield

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
H2O
CO2
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
(For now)