Geography ยท Physics

Geodesy and Celestial Mechanics

984 Questions

Geodesy and celestial mechanics questions explore Earth measurements, great circles, and planetary motions. These concepts form a crucial part of physical geography and astronomy in competitive exams. Practice these questions to grasp longitudinal and latitudinal calculations.

Longitude and latitude calculationsGreat circle conceptEarths axial precessionLagrangian pointsAtmosphere boundary

Geodesy and Celestial Mechanics Questions

Multiple choice

What is the spatial resolution of NCMRWF's weather forecasts?

  1. 12 km

  2. 25 km

  3. 50 km

  4. 100 km
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NCMRWF's weather forecasts have a spatial resolution of 12 kilometers.

Multiple choice

What is the term for the point in an orbit where an object is farthest from the body it is orbiting?

  1. Perihelion

  2. Aphelion

  3. Perigee

  4. Apogee
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aphelion is the point in an orbit where an object is farthest from the body it is orbiting, while perihelion is the point where it is closest.

Multiple choice

What is the difference between the length of one Julian year and the length of one tropical year?

  1. 11 minutes 14 seconds

  2. 11 minutes 15 seconds

  3. 11 minutes 16 seconds

  4. 11 minutes 17 seconds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The difference between the length of one Julian year and the length of one tropical year is 11 minutes 14 seconds.

Multiple choice

What is the length of one Julian year in draconic years?

  1. 365.2638

  2. 365.2422

  3. 365.25

  4. 365.24219
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The length of one Julian year is 365.2638 draconic years.

Multiple choice

What is the length of one Julian year in anomalistic years?

  1. 365.269

  2. 365.2422

  3. 365.25

  4. 365.24219
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The length of one Julian year is 365.269 anomalistic years.

Multiple choice

Which of the following is the longer year, the Julian year or the sidereal year?

  1. The Julian year

  2. The sidereal year

  3. They are the same length
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Julian year is longer than the sidereal year by approximately 20 minutes.

Multiple choice

Which type of year is used to determine the dates of the Islamic holidays?

  1. The Julian year

  2. The sidereal year

  3. They are both used equally
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The Islamic calendar is based on the lunar year, which is the time it takes for the Moon to complete one orbit around the Earth.

Multiple choice

How does a Golayantra measure the altitude of a celestial body?

  1. By measuring the angle between the celestial body and the horizon

  2. By measuring the angle between the celestial body and the zenith

  3. By measuring the angle between the celestial body and the celestial equator

  4. By measuring the angle between the celestial body and the ecliptic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A Golayantra measures the altitude of a celestial body by measuring the angle between the celestial body and the horizon.

Multiple choice

What is the term used to describe the point on a map where a celestial body is directly below the horizon?

  1. Ascendant

  2. Midheaven

  3. Nadir

  4. Imum Coeli
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Nadir, also known as the IC, is the point on a map directly below the horizon, representing the lowest point in the sky and often associated with family, roots, and inner emotions.

Multiple choice

What is the term used to describe the point on a map where a celestial body sets below the horizon?

  1. Ascendant

  2. Midheaven

  3. Nadir

  4. Imum Coeli
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Imum Coeli, also known as the IC, is the point on a map where a celestial body sets below the horizon, representing the end of a cycle and often associated with family, roots, and inner emotions.

Multiple choice

What is the term used to describe the point on a map where a celestial body is at its highest point above the horizon?

  1. Ascendant

  2. Midheaven

  3. Nadir

  4. Imum Coeli
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Midheaven, also known as the MC, is the point on a map directly overhead, representing the highest point in the sky and often associated with career, ambition, and public recognition.

Multiple choice

What is the period of the Earth's true anomaly?

  1. 365.242 days

  2. 365.256 days

  3. 366 days

  4. 367 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The period of the Earth's true anomaly is the time it takes for the Earth to complete one orbit around the Sun, as seen from the center of the Sun. This period is also known as the sidereal year and is equal to 365.256 days.

Multiple choice

What is the maximum value of the Earth's true anomaly?

  1. 360 degrees

  2. 180 degrees

  3. 90 degrees

  4. 45 degrees
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The maximum value of the Earth's true anomaly is 360 degrees, which occurs when the Earth is at perihelion, the point in its orbit when it is closest to the Sun.

Multiple choice

What is the minimum value of the Earth's true anomaly?

  1. 0 degrees

  2. 180 degrees

  3. 90 degrees

  4. 45 degrees
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The minimum value of the Earth's true anomaly is 0 degrees, which occurs when the Earth is at aphelion, the point in its orbit when it is farthest from the Sun.

Multiple choice

How does the period of the Earth's true anomaly affect the Earth's atmosphere?

  1. The period of the Earth's true anomaly does not affect the Earth's atmosphere.

  2. The period of the Earth's true anomaly causes the Earth's atmosphere to become thinner.

  3. The period of the Earth's true anomaly causes the Earth's atmosphere to become thicker.

  4. The period of the Earth's true anomaly causes the Earth's atmosphere to become unpredictable.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The period of the Earth's true anomaly does not affect the Earth's atmosphere because the Earth's atmosphere is held in place by the Earth's gravity. The Earth's orbit around the Sun does not affect the Earth's gravity, so the period of the Earth's true anomaly does not affect the Earth's atmosphere.