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Lab 6 – The Earth’s Orbital Velocity

Lab 6 – The Earth’s Orbital Velocity. My radial velocity is 0 mph?. I’m approaching the bus at 20 mph. I’m receding from the ambulance at 20 mph. I’m approaching the sports car at 160 mph?. V = 80 mph V = 80 mph.

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Lab 6 – The Earth’s Orbital Velocity

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  1. Lab 6 – The Earth’s Orbital Velocity

  2. My radial velocity is 0 mph? I’m approaching the bus at 20 mph. I’m receding from the ambulance at 20 mph. I’m approaching the sports car at 160 mph? V = 80 mph V = 80 mph V = 60 mph V = 40 mph V = 40 mph V = 60 mph V = 80 mph V = 80 mph

  3. VA ? ? VB To Ecliptic Vo  V Arcturus + Vearth VA = Vstar + Vearth VB = Vstar - Vearth Arcturus Vearth = 1/2(VA - VB) Vstar = 1/2(VA + VB) Vstar - Vearth Vearth = 1/2(VA - VB)/0.86 Vstar = 1/2(VA + VB)

  4. Spectral Lines Match Distant Star Earth Radial Velocity - Radial Velocity + Laboratory Spectrum Laboratory - No Radial motion Radial Velocity = 0 Blueshift Redshift  o

  5. VA ? ? VB  o Arcturus

  6. Measure for Plate Scale  Blue Red 4260.48 A 4307.91 A -0.37 -25.6 -0.15

  7. Vearth r Finding the Radius of the Earth’s Orbit • Circumference of the Earth's Orbit = 2r • Vearth = distance/time time =1 year, • distance = 2r • Vearth = 2r / time • r = (Vearth X time)/2

  8. The End

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