Earth Sun с 1 AU d = 1 pc pc p= 1 arc second Diagram: Geometry of parallax. Note that the angle shown is bigger than 1 arcsecond, because the diagram is not drawn to the same scale horizontally and vertically - 1 pc is actually 206,265 AU. To scale the drawing would look very flat. A particular star observed from Earth shows a parallax of 0.05 arcseconds. What is its distance from the Earth, in parsecs?

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