Question
The Hyades is 150 ly away from Earth, and is 75 ly in diameter. The globular cluster Omega Centauri is 18,000 ly away from Earth, and is 200 ly in diameter. What are the angular diameters of these two objects as seen from Earth?
Step 1
The formula is: Angular Diameter = 2 * arctan (diameter / (2 * distance)) where the angular diameter is in radians. Now, let's calculate the angular diameter for the Hyades: Angular Diameter (Hyades) = 2 * arctan (75 ly / (2 * 150 ly)) Angular Diameter Show more…
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