Question

Which of the following occurs because of the revolution of the Earth about the sun and cannot be accounted for in geocentric models of the solar system?

• A. The Coriolis effect
• B. Stellar parallax
• C. Planetary retrograde motion
• D. The phenomenon of day and night

Answer 1

The correct option is B Stellar parallax

Stellar parallax the difference in direction of a celestial object as seen by an observer from two widely separated points. The measurement of parallax is used directly to find the distance of the body from the Earth (geocentric parallax) and from the Sun (heliocentric parallax). The two positions of the observer and the position of the object form a triangle; if the base line between the two observing points is known and the direction of the object as seen from each has been measured, the apex angle (the parallax) and the distance of the object from the observer can be found simply.