Geography ยท Physics

Geodesy and Celestial Mechanics

1,049 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 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.

Multiple choice

What is the approximate value of Earth's eccentricity?

  1. 0.0167

  2. 0.0177

  3. 0.0187

  4. 0.0197
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth's eccentricity is approximately 0.0167.

Multiple choice

What was the value of the Earth's circumference calculated by Aryabhata?

  1. 40,000 miles

  2. 24,000 miles

  3. 36,000 miles

  4. 32,000 miles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aryabhata calculated the Earth's circumference to be 24,000 miles.

Multiple choice

What is the term for the point on the Earth's surface directly below a celestial object?

  1. Nadir

  2. Zenith

  3. Horizon

  4. Substellar point
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The substellar point is the point on the Earth's surface directly below a celestial object.

Multiple choice

What is the name of the imaginary line that divides the celestial sphere into two equal hemispheres?

  1. Celestial equator

  2. Ecliptic

  3. Tropic of Cancer

  4. Tropic of Capricorn
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The celestial equator is the imaginary line that divides the celestial sphere into two equal hemispheres.