Astronomy Practice Exam

Which type of constellation is visible all year round, especially in the northern sky?

1. Circumpolar constellation

2. Summer constellation

3. Ecliptic constellation

4. Tropical constellation

The correct answer is: Circumpolar constellation

Circumpolar constellations are the correct answer because they are positioned near the celestial poles and are visible throughout the entire year. This means that they never dip below the horizon, making them a staple in the night sky, especially for observers located in the northern hemisphere. Examples of circumpolar constellations include Ursa Major, Ursa Minor, and Cassiopeia. These constellations move in a circular path around the North Star, Polaris, which acts as a central point. Because of their continuous visibility, circumpolar constellations can be particularly useful for navigation and for tracking the passage of time through the seasons. Summer constellations are only visible during specific months in the summer season and don't offer year-round visibility. Ecliptic constellations lie along the path that the sun takes across the sky and change visibility with the seasons. Tropical constellations refer generally to how constellations are related to the zodiac and Earth's orbit, but they do not imply year-round visibility. Thus, the feature of circumpolar constellations aligns perfectly with the characteristics described in the question.