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MathType on Twitter: "An object's #SolidAngle is the segment of a unit sphere that it covers when looking at the object from the centre of the sphere. Although the Moon is much
properties/solid angle - calculator.org
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Solid Angle Calculator - Calculator Academy
Solid Angle Calculator - Calculator Academy
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Angle converter : degree, radian, grade, steradian, cosinus, sinus, tangent
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Photometry
Solid Angle
