Exoplanet Science Strategy (2018) / Chapter Skim
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Appendix G: Glossary
Appendix G: Glossary
Pages 168-172
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From page 168... ...
In exoplanet hunting, the astrometric method consists of making precise stellar location measurements and searching for motion of a star around a common center of mass with a planet. Biogenic: A substance produced by living organisms; produced or brought about by living organisms.
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From page 169... ...
Habitable zone: The region around a star where a terrestrial planet with an Earth-like atmosphere could support surface liquid water. The habitable zone is calculated using stellar irradiation, orbital parameters and a 1D or 3D climate model.
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From page 170... ...
Ohmic heating: Heating that occurs due to electric current flowing through a resistant medium. Photochemical haze: A haze created from the interaction of atmosphere and stellar radiation (most commonly ultraviolet radiation)
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From page 171... ...
Tidal locking: During long-term orbital interaction, when two co-orbiting bodies interact to drive the rotation rate of at least one of the bodies into a state where the orbital period is equivalent to, or an integer multiple of, the rotation rate. Transit: The passage of an astronomical object across the face of one of larger angular diameter.
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From page 172... ...
Weathering: The breaking down of materials, through either physical or chemical forces. Physical processes include destruction through direct contact with abrasive forces, heat, or pressure.
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