THE SEARCH FOR EXO-EARTHS - parrise.elte.huparrise.elte.hu/tpi-15/slides/Horvath_Zsuzsa.pdfEARTH’S...
Transcript of THE SEARCH FOR EXO-EARTHS - parrise.elte.huparrise.elte.hu/tpi-15/slides/Horvath_Zsuzsa.pdfEARTH’S...
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EARTH’S TWINS ?THE SEARCH FOR EXO-EARTHS
ZSUZSA HORVATH KOSZTOLANYI HIGHSCHOOL
BUDAPESTInternational Conference on
Teaching Physics Innovatively17-19 August 2015
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Earth and Mars
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ARE WE ALONE IN THE UNIVERSE?
Is there life beyond Earth?
Where is everybody?(Enrico Fermi)
Will we find intelligent life?
What is life? Could we detect life?
How did life evolve on the Earth?
What makes a world habitable?
Can we live in elsewhere in the universe?
How did the Solar System form?
How many alien solar systems have beenfound so far?
What fractions of stars host planets?
Are Earth-size planets in the habitablezone of stars common or rare in ourgalaxy?
What are the most important exoplanetdiscoveries so far?
What is the nearest exoplanet to Earthand our solar system?
Are there Earth-like planets around ournearest stellar neighbor?
What is the shortest distance between anexoplanet and its parent or host star sofar?
What is the strongest surface gravity foran exoplanet so far? …
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OUR SOLAR SYSTEM
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PLANET SYSTEMS DISCOVERED BY KEPLER
SPACE TELESCOPE
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How Are the Discoveries Made?
Direct detection:Imaging
Indirect detection:Radial velocity (Spectroscopic method)
Transit method
Gravitational microlensing
Astrometry, Pulsar timing and others
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The radial velocity graph of 51 Pegasi
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Artist’s concept of 51 Pegasi b, thefirst exoplanet detected around Sun-
like star (1995)Image via Dr. Seth Shostac/SPL
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DIRECT IMAGING
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HABITABLE ZONE
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RECENT DISCOVERIES
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Kepler-452b
EARTH AND KEPLER-452b15
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KEPLER SPACE TELESCOPE
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FUTURE EXOPLANETS MISSIONS
TESS (2017)TransitingExtrasolar
Survey Satelitte
CHEOPS (2017)Characterizing
ExOPlanetSatellite
PLATO (2024)Planetary Transitsand Oscillations of
stars
JWST (2018)James Webb
Space Telescope
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INTERSTELLAR TRIP PLANNER (PlanetQuest Interactive, NASA)
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http://www.planethunters.orghttp://planetquest.jpl.nasa.gov/interactiveshttp://eyes.jpl.nasa.gov/eyes-on-exoplanets.html
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Are we alone in the universe?
"I believe we are going to have strong indications of life beyond Earth in the next decade and definitive evidence in the next 10 to
20 years," "We know where to look, we know how to look, and in most cases
we have the technology,"
Ellen Stofan, chief scientist for the National Aeronautics and Space Administration
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Thank you for your attention!
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References:
http://kepler.nasa.gov/
http://planetquest.jpl.nasa.gov/science
http://lcogt.net/spacebook/exoplanets/
http://exoplanet.eu/catalog/
http://phl.upr.edu/projects/habitable-exoplanets-catalog
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