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
Which trigonometric function is used to calculate the height of a celestial body above the horizon?
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Sine
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Cosine
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Tangent
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Cosecant
C
Correct answer
Explanation
The tangent function is used to calculate the height of a celestial body above the horizon, using the formula (h = R \tan \alpha).
What is the term used for the angle between the true north and the compass north?
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Altitude
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Azimuth
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Declination
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Variation
D
Correct answer
Explanation
Variation is the term used for the angle between the true north and the compass north.
What is the term used for the angle between the celestial equator and the ecliptic?
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Altitude
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Azimuth
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Obliquity
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Latitude
C
Correct answer
Explanation
Obliquity is the term used for the angle between the celestial equator and the ecliptic.
What is the plasma sheet?
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The region of the magnetosphere that is located above the Earth's magnetic equator
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The region of the magnetosphere that is located below the Earth's magnetic equator
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The region of the magnetosphere that is located between the Earth's magnetic equator and the magnetopause
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The region of the magnetosphere that is located between the Earth's magnetic equator and the bow shock
A
Correct answer
Explanation
The plasma sheet is the region of the magnetosphere that is located above the Earth's magnetic equator. The plasma sheet is filled with hot, dense plasma.
What is the Hubble Space Telescope's field of view?
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0.1 square degrees
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1 square degree
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10 square degrees
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100 square degrees
A
Correct answer
Explanation
The Hubble Space Telescope's field of view is 0.1 square degrees, which is about the size of a postage stamp held at arm's length.
What is the Hubble Space Telescope's angular resolution?
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0.1 arcseconds
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1 arcsecond
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10 arcseconds
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100 arcseconds
A
Correct answer
Explanation
The Hubble Space Telescope's angular resolution is 0.1 arcseconds, which is about the size of a human hair seen from a distance of 1 kilometer.
What is the James Webb Space Telescope's field of view?
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0.1 square degrees
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1 square degree
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10 square degrees
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100 square degrees
B
Correct answer
Explanation
The James Webb Space Telescope's field of view is 1 square degree, which is about the size of a postage stamp held at arm's length.
What is the approximate distance between the two LIGO detectors?
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100 kilometers
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1,000 kilometers
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3,000 kilometers
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10,000 kilometers
C
Correct answer
Explanation
The two LIGO detectors are located approximately 3,000 kilometers apart, one in Hanford, Washington, and the other in Livingston, Louisiana.
What is the formula for calculating the latitude of a ship using trigonometry?
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Latitude = arcsin(sin(altitude) / sin(declination))
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Latitude = arccos(cos(altitude) / cos(declination))
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Latitude = arctan(tan(altitude) / tan(declination))
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Latitude = arccot(cot(altitude) / cot(declination))
A
Correct answer
Explanation
The formula for calculating the latitude of a ship using trigonometry is Latitude = arcsin(sin(altitude) / sin(declination)).
What is the declination of a star?
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The angle between the star and the celestial equator
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The angle between the star and the ecliptic
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The angle between the star and the horizon
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The angle between the star and the zenith
A
Correct answer
Explanation
The declination of a star is the angle between the star and the celestial equator.
What is the altitude of a star?
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The angle between the star and the celestial equator
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The angle between the star and the ecliptic
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The angle between the star and the horizon
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The angle between the star and the zenith
C
Correct answer
Explanation
The altitude of a star is the angle between the star and the horizon.
What is the zenith of a star?
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The point directly overhead
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The point directly below
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The point on the horizon
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The point on the celestial equator
A
Correct answer
Explanation
The zenith of a star is the point directly overhead.
What is the celestial equator?
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The line that divides the celestial sphere into two equal halves
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The line that connects the north and south poles of the celestial sphere
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The line that passes through the zenith and the nadir
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The line that passes through the east and west points of the celestial sphere
A
Correct answer
Explanation
The celestial equator is the line that divides the celestial sphere into two equal halves.
What is the prime meridian?
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The line of longitude that passes through Greenwich, England
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The line of longitude that passes through the North Pole
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The line of longitude that passes through the South Pole
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The line of longitude that passes through the equator
A
Correct answer
Explanation
The prime meridian is the line of longitude that passes through Greenwich, England.
What is the difference between latitude and longitude?
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Latitude is the angle between the star and the celestial equator, while longitude is the angle between the star and the prime meridian
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Latitude is the angle between the star and the ecliptic, while longitude is the angle between the star and the prime meridian
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Latitude is the angle between the star and the horizon, while longitude is the angle between the star and the prime meridian
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Latitude is the angle between the star and the zenith, while longitude is the angle between the star and the prime meridian
A
Correct answer
Explanation
Latitude is the angle between the star and the celestial equator, while longitude is the angle between the star and the prime meridian.