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 typical distance of gamma-ray bursts from Earth?

  1. A few light-years

  2. A few hundred light-years

  3. A few thousand light-years

  4. A few million light-years
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gamma-ray bursts are typically located at cosmological distances, millions of light-years away from Earth.

Multiple choice

What is the average orbital inclination of an asteroid in the asteroid belt?

  1. 5 degrees

  2. 10 degrees

  3. 15 degrees

  4. 20 degrees
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The average orbital inclination of an asteroid in the asteroid belt is approximately 10 degrees.

Multiple choice

What is the average albedo of an asteroid?

  1. 0.1

  2. 0.2

  3. 0.3

  4. 0.4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The average albedo of an asteroid is approximately 0.2.

Multiple choice

What is the current value of the Earth's orbital eccentricity?

  1. 0.0167

  2. 0.00167

  3. 0.167

  4. 0.000167
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Earth's orbital eccentricity is currently about 0.0167, which means that its orbit is slightly elliptical. This eccentricity is constantly changing, however, and it can range from 0 to 0.07 over a period of about 100,000 years.

Multiple choice

What was the distance to GW150914?

  1. 400 million light-years

  2. 1.3 billion light-years

  3. 2.4 billion light-years

  4. 3.5 billion light-years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

GW150914 was located 1.3 billion light-years away from Earth.

Multiple choice

What was the distance to GW151226?

  1. 440 million light-years

  2. 1.4 billion light-years

  3. 2.3 billion light-years

  4. 3.2 billion light-years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

GW151226 was located 1.4 billion light-years away from Earth.

Multiple choice

What was the distance to GW170104?

  1. 880 million light-years

  2. 1.2 billion light-years

  3. 1.9 billion light-years

  4. 2.6 billion light-years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GW170104 was located 880 million light-years away from Earth.

Multiple choice

What is the Hubble Space Telescope's field of view?

  1. 0.1 square degrees

  2. 1 square degree

  3. 10 square degrees

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

The Hubble Space Telescope's field of view is 0.1 square degrees. This means that it can only see a small portion of the sky at any given time.

Multiple choice

What is the Hubble Space Telescope's angular resolution?

  1. 0.1 arcseconds

  2. 1 arcsecond

  3. 10 arcseconds

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

The Hubble Space Telescope's angular resolution is 0.1 arcseconds. This means that it can see objects that are very close together.

Multiple choice

What is the average distance between Earth and the Sun?

  1. 149.6 million kilometers

  2. 152.1 million kilometers

  3. 158.7 million kilometers

  4. 147.1 million kilometers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The average distance between Earth and the Sun is approximately 149.6 million kilometers, also known as one astronomical unit (AU).

Multiple choice

What is the approximate time it takes for Earth to complete one rotation on its axis?

  1. 23 hours 56 minutes

  2. 24 hours

  3. 25 hours 6 minutes

  4. 26 hours 12 minutes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earth completes one rotation on its axis in approximately 24 hours, which is equivalent to one day.

Multiple choice

What is the approximate time it takes for Earth to complete one revolution around the Sun?

  1. 365.24 days

  2. 366.24 days

  3. 367.24 days

  4. 364.24 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth completes one revolution around the Sun in approximately 365.24 days, which is equivalent to one year.

Multiple choice

What is the tilt of Earth's axis?

  1. 23.5 degrees

  2. 24.5 degrees

  3. 25.5 degrees

  4. 26.5 degrees
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth's axis is tilted at an angle of approximately 23.5 degrees, which causes the seasons.

Multiple choice

What is the approximate time it takes for Earth's precession to complete one cycle?

  1. 26,000 years

  2. 27,000 years

  3. 28,000 years

  4. 29,000 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth's precession takes approximately 26,000 years to complete one cycle.

Multiple choice

What is the approximate value of Earth's obliquity?

  1. 23.5 degrees

  2. 24.5 degrees

  3. 25.5 degrees

  4. 26.5 degrees
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth's obliquity is approximately 23.5 degrees.