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# Astronomy

Suppose you observe Venus at the same time on several successive days. Describe the relative motion of Venus and the Sun and discuss any constraints regarding their relative positions. Explain why those constraints exist or don't exist.

Note: About a paragraph is fine

Ray Atkinson :

Given that you are observing Venus and the Sun at the same time each day at the same time of year, the Sun is not going to change its position. Venus's position is going to be changing as it orbits the Sun. It may be between the Sun and the Earth (an "inferior conjunction" or a "transit"); it may be behind the Sun (a "superior conjunction"), or it may be visible. The largest angle that Vanus can be separated from the Sun is 46° (its maximum "elongation"), as its orbit is closer to the sun that Earth's.