1. The parallel of latitude at 23°27 N is the ? Tropic of Cancer
2. The largest of the navigational planets is ? Jupiter
3. The planet Mars will have its greatest magnitude when at ? Opposition
4. Mars is only seen at two phases, one of which ? Is the full phase
5. Mars will not be visible ? At conjunction
6. Opposition occurs when ? The Earth is between a planet and the Sun
7. When a superior planet is at 90° elongation, it is also at ? Quadrature
8. Retrograde motion is the ? Apparent westerly motion of a planet with respect to stars.
9. The spinning motion of a planet around its axis is called ? Rotation
10. After Venus passes the point of greatest elongation east in its orbit, the first position in which the elongation will be zero is ? Inferior conjunction
11.Which is an inferior planet ? Venus
12.Other than the Sun and Moon, the brightest object in the sky is ? Venus
13.What is the brightest navigational planet ? Venus
14.The parallax angle will vary the most with the time of year for ? Venus
15.The planet Venus can be observed in the morning if it is well to the ? West of and higher than the Sun.
16. What celestial body may sometimes be observed in daylight ? Venus
17. The precession of the equinoxes occurs in a ? Westerly direction
18. The precession of the equinoxes of the Earth is ? Similar to a top spinning with its axis tilted.
19."Revolution" is the ? Motion of a celestial body in its orbit
20. The motion of a celestial body in its orbit around another body is known as ? Revolution
