2.4 Exoplanets Flashcards
Who was the first exoplanet discovered by?
Michel Mayor and Didier Queloz.
What are the 3 methods of exoplanet discovery?
Astrometry, the transit method and Doppler shift.
What’s astrometry?
Measuring the precise position of the stars relative to each other, if they wobble it’s likely they have an exoplanet.
What’s the transit method?
Measuring of dips in light of stars to see if a planet has moved in front of it.
What’s the Doppler shift?
Measure the light from star and if it changes over time then there’s a chance of an exoplanet.
What are the two essential chemical ingredients for life?
Carbon and liquid water.
Name three factors of the Drake equation.
N- number of civilisations where communication is possible.
R*- average rate of star formation per year in our galaxy.
L- length of time signals released into space.
