Exoplanets how do we find them

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Exoplanets how do we find them?

• Size matters!
• We rarely see the planet, but we do see its
  effect on the star that it orbits

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Changes in radial velocity spectral shifts
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Gravitational lensing
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Transits
http//media4.obspm.fr/exoplanetes/base/simulateur
.php
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Transits
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Astrometry

• Ex Suns path influenced mostly by Jupiter and
  Saturn
• Being studied

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Rare cases Direct imagery