When the Earth is on one side of the sun, a star's location is recorded. In six months, when the Earth is on the other side of the sun, the same star is observed and the distance between the first observation and the second is calculated. What is this an example of?
This is an example of trigonometric parallax. Trigonometric parallax is a technique used to measure the distance to a star by observing its apparent shift in position as seen from different points in Earth's orbit. By comparing the star's position when the Earth is on one side of the sun with its position when the Earth is on the other side, the distance to the star can be calculated using trigonometry.
