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THE Extraterrestrial life THE Extraterrestrial life

THE Extraterrestrial life - PowerPoint Presentation

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THE Extraterrestrial life - PPT Presentation

VAravinthan 2011FM034 WHO WE ARE WHAT IS LIFE The condition that distinguishes animals and plants from inorganic matter including the capacity for growth reproduction functional activity and continual change preceding death ID: 278740

planets life universe stars life planets stars universe terrestrial earth civilizations extraterrestrial 000 equation habitable exist observable water big

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Slide1

THE Extraterrestrial life

V.Aravinthan

2011/FM/034Slide2

WHO WE ARE?Slide3

WHAT IS LIFE?

The condition that

distinguishes

animals and plants from inorganic matter

, including the capacity for growth, reproduction, functional activity, and continual change preceding death .Slide4

LIFE AS WE KNOW IT REQUIRES

Liquid water.

Some form of energy (e.g. sunlight, chemical, volcanic).

Access to organic materials (e.g. carbon compounds).

A sufficiently stable environment (i.e. time to originate and evolve).Slide5

A HABITABLE WORLD

Distance

from

its

star

, not too far, not too closeSize, not too big, not too smallAtmosphere to keep the planet warm and water liquidWater

JUST LIKE EARTH!!!Slide6

HOW BIG THE UNIVERSE IS???

The Earth

Solar system

The Galaxy

Local Group of galaxies

Cluster of galaxies

Super cluster of Galaxies

There may be around 10

21 stars in the observable universe…Slide7

IN THE OBSERVABLE UNIVERSE...

400 billion stars

50 million planets

If we take 1% of them are habitable

Around 500 million planets will have life formsSlide8

DRAKE’S EQUATION

The

Drake equation

is a mathematical equation used to estimate the number of

detectable extraterrestrial civilizations

in the Milky Way galaxy.

N= R*

f

s*fp*ne*fl*fi*fc*LMinimal Value is in millionsSlide9

LOOKING FOR HABITABLE WORLDS

Kepler

(2006)

-

Look

for

terrestrial planets around 100,000 stars.Terrestrial Planet Finder (TPF)- 2015-Look for terrestrial planets around 100 nearby stars.Eddington (2008) - Looking for

planets

bigger

than

Mars

around

500,000

stars

.

Darwin (2015)

-

Look

for

terrestrial

planets

around

1,000

stars

.Slide10

INTELLIGENT LIFE???

Arecibo Antena,

Puerto RicoSlide11

THE PIONEER MESSAGESlide12

SETI

Allen arraySlide13

NEW EVIDENCES

Wikileaks

documents.

Cable no –

10

DUSHANBE8

2Slide14

REPORTED SIGHTINGS-MUFONSlide15

ARGUMENTS AGAINST ET LIFE

Fermi’s paradox

Contradiction

between the high probability that extraterrestrial civilizations exist and the lack of contact with these civilizations

Rare Earth Hypothesis

The

emergence of complex multi cellular life on Earth required an improbable combination of astrophysical and geological events and circumstances.Slide16

SCIENTISTS THOUGHTS...

Of course it is possible that

UFO's really do contain aliens

as many people believe, and the Government is hushing it up

. (Stephan Hawking)

Given the millions of billions of Earth-like planets,

life elsewhere in the Universe without a doubt, does exist

. In the vastness of the Universe

we are not alone. (Albert Einstein)Slide17

THERE ARE TWO POSSIBILITIES

May be we are alone….

May be

w

e are not….

Both are equally amazing.Slide18

SOMEWHERE, SOMETHING INCREDIBLE IS WAITING TO BE KNOWN.

THANK YOU