Doppler shift lets you see a star move back and forth. O look larger and smaller. look bluer and redder-but the shift is extremely small and is visible only if is r and away from you, so it only works from certain viewing angles. O look brighter and dimmer.
Doppler shift lets you see a star move back and forth. O look larger and smaller. look bluer and redder-but the shift is extremely small and is visible only if is r and away from you, so it only works from certain viewing angles. O look brighter and dimmer.
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Transcribed Image Text:Doppler shift lets you see a star
move back and forth.
look larger and smaller.
look bluer and redder-but the shift is extremely small and is visible only if is moving towards
and away from you, so it only works from certain viewing angles.
O look brighter and dimmer.
O The Doppler shift brightens up a dim planet so you can see it.
Transcribed Image Text:What can astronomers learn from the Radial Velocity method?
Actual mass of a planet
Period of a planet's orbit
Minimum mass of a planet, because systems at the wrong inclination or viewing angle show less
Doppler effect
Period of orbit and minimum mass of a planet
O Size (radius), density and composition of a planet
Density and composition of a planet
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