# How can you use trigonometric parallax to measure the distance to a star?

How can you use trigonometric parallax to measure the distance to a star?

Trigonometric parallax is a method of measuring the distance to a star by using the apparent shift of the star's position in the sky as the Earth orbits around the Sun.

By measuring the star's position from two different points in the Earth's orbit, its parallax angle can be determined.

This angle can then be used to calculate the distance to the star using the formula for measuring the sides of a triangle.

For example, one can measure the position of the star from the Earth in January and then again in July.

By comparing the two positions, the angle of parallax can be determined.

This angle can then be used to calculate the distance to the star using the formula for measuring the sides of a triangle.

This method can be used to measure the distance to stars that are up to a few thousand light years away.

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