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# What relationship, if any do you see between the shape of the parallax path...

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9 years ago
 What relationship, if any do you see between the shape of the parallax path... What relationship, if any do you see between the shape of the parallax path and the ecliptic latitude of the stars? Read 1362 times 1 Reply

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Staff Member
A month ago
 The shape of the parallax path of a star is closely related to its ecliptic latitude. Here’s how:1. Stars at the Ecliptic Pole: For stars located at the ecliptic pole (90° latitude), the parallax path forms a circle. This is because the star’s position relative to the Earth’s orbit remains perpendicular throughout the year.2. Stars at Intermediate Latitudes: As you move away from the ecliptic pole, the parallax path becomes an ellipse. The semi-major axis of the ellipse remains constant, but the semi-minor axis decreases as the ecliptic latitude decreases.3.  Stars on the Ecliptic Plane: For stars located on the ecliptic plane (0° latitude), the parallax path flattens into a straight line. This is because the star’s position aligns with the plane of Earth’s orbit, causing the parallax motion to be linear. In summary, the parallax path transitions from a circle to an ellipse to a straight line as the ecliptic latitude of the star decreases from 90° to 0°.