¿Is someone out there

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Presentación impartida como evaluación en el curso "Inglés conversacional C1" impartido por la Casa de las Lenguas, de la Universidad de Oviedo.

Transcript of ¿Is someone out there

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• What are the basics requirements for life?

• Could life have arisen elsewhere in solar system?

• Are there other planets like Earth?

• How likely is the evolution of intelligent life?

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Basics requirements for life

Hellicobacter pylori

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• Major atoms in abundance

• Constant temperature

• Medium for molecular interaction

• No nocive cosmic radiation

• Source of energy

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Solar System

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-170ºC – 120ºC

No atmosphere

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¿Outside solar system?

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Exoplanet

• Orbits around a star

• Does not produce light

• Reflects one billionth of its star light

• Mass under 13MJUP

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Stars are form

Dust Disk

Planets may be formed in the flattened disc

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Brown Dwarf

False Discoveries

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The first exoplanets were discovered…

around a pulsar!

A. Wolszczan and D. Frail (1991)

PSR1257+12

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51 Pegasi b

First planet discovered orbitting a Principal Sequence Star

T = 4 days, M = 0,5 MJUP

M. Mayor and D. Queloz (1995)

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Radial Velocity

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Radial Velocity

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Astrometry

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Astrometry

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Photometry

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Photometry

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Gravitational Lensing

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Distance to Pleiades 370pc

Farest Away planet detected byRadial Velocity / Astrometry ~400pc

Transit / Microlens / Pulsar ~6,5kpc

Milky Way Radius ~15kpc

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Search for ExtraTerrestrial Intelligence

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Voyager gold record

Voyager gold record

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“We are a way for the universe to know itself”

Carl Sagan

Thank you