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Level 1 Questions What is an exoplanet? What is an exoplanet? The definition of a planet Where are the exoplanets? In the sky The host stars How many exoplanets are there ? There's a lot out there Are there fewer elsewhere ? SWEEPS and the distant exoplanets How does one find exoplanets? We (usually) cannot see exoplanets We detect them Are exoplanets like the Earth? Yes... No... Is there life in the Universe? 100 billion stars, 100 billion galaxies What kind of life? How can we detect life? Space missions in search of life Can we communicate with possible inhabitants? Could we communicate with possible inhabitants? Will we be able to visit exoplanets? Visiting exoplanets Topics The research projects The search for exoplanets with the radial velocity method Other ground-based programs The future Future space projects dedicated to the search for exoplanets Space projects not dedicated to exoplanet detection The future ground-based instruments The current report on the discoveries The professions From ideas to specifications Conception Achievement, tests and acceptance The administrative staff The technical staff The computing staff The research staff Life in the universe Introduction Drake's equation Assessment of current knowledge The anthropic principle Fermi's paradox The SETI project Conclusion Planets in history First astrometric attempts Gamma Cep and Epsilon Eri, exoplanets or illusions ? HD 114672 b, a possible brown dwarf? Exotic exoplanets The three first giant exoplanets The return of Lalande 21185 Shades and lights with HD 209458 Level 2 CoRoT The CoRoT space project The CoRoT mission The satellite The PROTEUS platform The rocket The ground segment The CoRoT data center The instrument The telescope Telescope principle The afocal collector The dioptric objective The focal block CCD Bi-prism block Observation technique Observe-detect-measure Spectroscopy Photometry Observation sites The research Scientific objectives CoRoT program Extra-solar planets The detected exoplanets Exoplanet Researchers Pointing directions Detection methods Sismology Observing the vibrations Planets or stars? The star 51 Pegasi Detecting the exoplanets Transit method The transits of Mercury and Venus Brightness variations CoRoT sky The eyes of CoRoT The targets The orbit Procedure Preparation work Preparation of the sismology program Preparation of the exoplanet program The actors The project manager The industrialists and the CNES at Toulouse Foreign partners The scientists The laboratories History In short The variable stars EVRIS The first exoplanet The new CoRoT Realization of CoRoT The other satellites The launch To go in greater depth Spectra and signals The Fourier method The vibrations of the Sun Identification of the oscillations The spectrum of the Sun Evolution of the stars The interior of the stars Temperature, luminosity Internal structure Other programs And also... Variable stars Magnetic activity Binary systems Comets The Kuiper objects The Oort cloud Exoplanets Introduction What is an exoplanet ? Definition of a planet Definition of a planet Why search for exoplanets? First motivation : comparative planetology How do we detect exoplanets? Introduction Dynamic methods Radial velocities Other dynamic methods Planetary transits Gravitational lens Decametric detection Direct imaging What we have already found Current observation campaigns Properties of the discovered planets The first lessons How do we detect forms of life? Exactly what are we searching for? The notion of a habitable zone How do we search? The future projects Astrometry Transits Direct imaging On the ground In space Decametric emission Level 3 The tools of a planet researcher The tools of a planet researcher The units The units used to measure distances The units used to measure masses The units used to measure time The units used to measure the brightness of the stars To check an equation The mathematical notations Notations A function The mechanics of planets The mechanics of planets Kepler's laws The law of gravity The Roche limit The Roche limit Calculation of the Roche limit Resonances What is a resonance? Where are the resonances? What parts do resonances play? The forces The forces in the Universe Temperatures and states of matter The states of matter The states of matter in the Universe Stellar and planetary evolution A gas cloud collapses on itself A choice between a star, a brown dwarf or a planet In the environment of a star Life and Death of a star The electromagnetic spectrum The light of the Sun The speed of light The electromagnetic spectrum The black body The spectrum of a planet Matter The chemical elements The first planets The hydrogen atom The atoms Atoms, molecules and spectra The barycenter The center of mass The Doppler effect The Doppler effect Applications of the Doppler effect