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Exoplanets

Tom Barclay
January 14, 2017

 Exoplanets

A talk I gave to a group of Indian school kids about NASA exoplanet experiments. This public talk level.

Tom Barclay

January 14, 2017
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  1. Tom Barclay
    NASA Ames Research Center
    January 11, 2017
    Exoplanet Discovery

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  2. Detecting Planets

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  3. The amount of dimming tells us
    the size of the exoplanet.
    The time it takes to complete an
    orbit tells us how far away it is
    from the star.

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  4. NASA’s Kepler Mission:
    What fraction of stars in our galaxy harbor potentially
    habitable, earth-size planets?

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  5. *
    *
    March 6, 2009

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  6. Exoplanet Detections, 1995-2009
    Radius Relative to Earth
    Orbital Period in days
    Earth
    Jupiter

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  7. Coughlin et al. 2015
    Exoplanet Detections, 1995-2015
    Radius Relative to Earth
    Orbital Period in days

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  8. A. Kepler has told us that planets are everywhere.
    B. Finding small planets on long orbital periods is hard
    D. We can combine observations, theory and modern
    statistics.

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  9. 0
    0.05
    0.1
    0.15
    0.2
    0.25
    0.3
    0.35
    0.4
    0.5-0.7 0.7 - 1 1 – 1.4 1.4 - 2 2 – 2.8 2.8 - 4 4 – 5.7 5.7 - 8 8 - 11 11 - 16 16 - 23
    Planet Size (Earth=1)
    Fraction Observed
    Sizes not seen in our Solar System
    55
    165
    381
    520
    567
    268
    94
    54 53 39 17

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  10. 0
    0.05
    0.1
    0.15
    0.2
    0.25
    0.3
    0.35
    0.4
    Sizes not seen in our Solar System
    1
    – 1.4
    1.4
    - 2
    2
    – 2.8
    2.8
    - 4
    4
    – 5.7
    5.7
    - 8
    8
    - 11
    11
    - 16
    16
    - 23
    Planet Size (Earth=1)
    Average Number of Planets per Star

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  11. Confirmed Habitable Zone Planets
    New validations from Morton et al. 2016 ApJ 822 86

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  12. Spitzer
    Kepler
    JWST1
    TESS
    Missions
    WFIRST-AFTA
    NASA
    Missions
    1 NASA / ESA Partnership
    Hubble1 Habitable Exoplanet Imager
    L-UV-OIR
    Large Binocular
    Telescope Interferometer NN-EXPLORE
    W. M. Keck Observatory
    New
    Worlds
    Telescope

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  13. Kepler Search Space:
    3000 light-years
    0.25% of the sky
    TESS Search Space:
    200 light-years
    All-sky

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  14. The Dark Side of the Moon
    Pink Floyd/Capitol Records
    Light from Star

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  15. Voyager’s picture of Earth,
    the Pale Blue Dot
    Spectrum of the reflected light reveals a living
    world.

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  16. Earth’s Spectral Fingerprints are Unique
    Credit: Sky & Telescope 10/2015; reproduced from Robinson & Meadows
    Vegetation

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  17. Spitzer
    Kepler
    JWST1
    TESS
    Missions
    WFIRST-AFTA
    NASA
    Missions
    1 NASA / ESA Partnership
    Hubble1 Habitable Exoplanet Imager
    L-UV-OIR
    Large Binocular
    Telescope Interferometer NN-EXPLORE
    W. M. Keck Observatory
    New
    Worlds
    Telescope

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  18. Large Space Telescope Required

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  19. Coronagraph Technology

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  20. Star ShadeTechnology

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  21. “Is there life on other
    worlds? For the first
    time in human history,
    we have finally been
    able to embark on the
    systematic, scientific
    pursuit of an answer.”
    NASA 30-Year Roadmap for Astrophysics

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  22. Where will exploration take us in 100 years?
    33
    Exoplanet Travel Bureau

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