How stellar parallax is measured?

Answer 1

Earth's orbit is used as base i n measurements..It is 300 million kilometers .measurements are done after 6 months time.

View the diagram to see how the angle of parallaxis is guaranteed: d=1/p, where p is the parallax angle in arc seconds and d is the distance to stars in parsecs. Photo courtesy of the joefshersherloperlon blog on spot.com.

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Answer 2

John Alexander

Star parallax is the angle that a star's distance from the Sun is calculated using trigonometry. It is measured by looking at how much a star appears to shift in position relative to far-off background stars as the Earth orbits the Sun. This shift results from a change in the observer's perspective.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.