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# Geodesy Fundamentals Quiz

Created by
@GodGivenPeridot

### What is the date for the Winter Solstice in the Northern Hemisphere?

• September 21
• June 21
• March 21
• December 21 (correct)
• ### When is the Earth closest to the sun in its elliptical orbit?

• September 21
• June 21
• March 21
• January 3 (correct)
• ### What is the axis tilt of the Earth from the ecliptic plane?

• 23.5 degrees (correct)
• 15 degrees
• 30 degrees
• 45 degrees
• ### Which method is used for finding latitude, longitude, and azimuth in practical astronomy?

<p>PZS Triangle</p> Signup and view all the answers

### On which date does the Northern Hemisphere experience the Summer Solstice?

<p>June 21</p> Signup and view all the answers

### What is the axis tilt from the ecliptic plane?

<p>23.5 degrees</p> Signup and view all the answers

### When is the Earth closest to the sun in the Northern Hemisphere?

<p>January 3 (Perihelion)</p> Signup and view all the answers

### What is the semi-diameter when the Earth is closest to the sun?

<p>0-16’15.9”</p> Signup and view all the answers

### On which date does the Earth experience the Winter Solstice in the Northern Hemisphere?

<p>December 21</p> Signup and view all the answers

### What is the distance from the sun when the Earth is furthest from it?

<p>152 million kilometers</p> Signup and view all the answers

### Explain the concept of the Earth's elliptical orbit around the sun and its impact on the changing distance between the Earth and the sun throughout the year.

<p>The Earth's elliptical orbit around the sun causes the distance between the Earth and the sun to vary. The closest point to the sun, known as perihelion, occurs around January 3, while the furthest point, known as aphelion, occurs around July 3.</p> Signup and view all the answers

### Describe the significance of the 23.5-degree axis tilt from the ecliptic plane and its impact on the changing seasons in the Northern Hemisphere.

<p>The 23.5-degree axis tilt from the ecliptic plane causes the changing of seasons in the Northern Hemisphere. It results in variations in the amount of sunlight reaching different parts of the Earth, leading to the occurrence of Winter Solstice, Spring Equinox, Summer Solstice, and Autumn Equinox.</p> Signup and view all the answers

### Discuss the practical applications of astronomy and celestial coordinates, and how they are utilized in geodesy.

<p>Practical applications of astronomy and celestial coordinates in geodesy include methods for finding latitude, longitude, and azimuth. These techniques are essential for geodetic systems, datums, map projections, and GPS.</p> Signup and view all the answers

### Explain the different celestial coordinate systems, such as the Altitude-Azimuth System and Right Ascension-Declination System, and how they are used in astronomy.

<p>The Altitude-Azimuth System and Right Ascension-Declination System are celestial coordinate systems used in astronomy. The Altitude-Azimuth System is based on the observer's local horizon, while the Right Ascension-Declination System is fixed relative to the stars.</p> Signup and view all the answers

### Discuss the significance of the PZS triangle methods in astronomy for determining latitude, longitude, and azimuth, and their relevance in geodesy.

<p>The PZS triangle methods are essential in astronomy for determining latitude, longitude, and azimuth. These methods are also relevant in geodesy for accurately mapping the Earth's surface and establishing geodetic reference systems.</p> Signup and view all the answers

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