Slide 1 Flashcards
The celestial equator is a great circle which is the:
a. intersection of the terrestrial equatorial plane with
the celestial sphere
b. apparent path of the earth on the celestial sphere
c. ecliptic
d. hour circle of the sun
intersection of the terrestrial equatorial plane with
An observertical axis in the celestial sphere is a line
a. Normal to the horizon of the observer
b. Normal to the polar axis of the celestial sphere
c. Normnal to the plumb line of the observer
d. Normal tot the plane of the celestial equator
Normal to the horizon of the observer
What is the great circle that divides the earth with the
northern and southern hemisphere
a. A meridian at longitudinal zero
b. A parallel of latitude at Greenwich
c. The prime meridian
d. The parallel at zero latitude
The parallel at zero latitude
What is the great circle that divides the earth in the eastern
and western hemisphere
a. The meridian at zero longitude
b. The vertical at Greenwich
c. The parallel of latitude at the equator
d. The meridian at 120° longitude
The meridian at zero longitude
What would be the position of the observer when his horizon
is normal to the axis of the carth?
a. At latitude 60°N
b. At latitude 45° N
c. Zero latitude
d. At latitude 90°N
At latitude 90°N
What would be the position of the observer in the northern
hemisphere when his horizon is parallel to the polar axis of
the earth?
a. At zero latitude
b. At latitude 30° N
C. At latitude 25° N
d. At latitude 90° N
At zero latitude
The intersection of the plane of the earth’s axis and the
celestial sphere is the great circle called the:
a. Equinoctial colure
b. Celestial equator
c. Ecliptic
d. The hour circle of zero declination
Ecliptic
The maximum declination of a point on the ecliptic is:
a. 23°30° N
b. 15° N
C. 60° N
d. 18°30’ N
a. 23°30° N
The minimum declination of a point on the ecliptic is:
a. 15°S
b. 60°S
c. 18°30’S
d. 23°30’S
23°30’S
The point of zero declination on the ecliptic is at the:
a. Vernal equinox
b. Lower culmination of the sun
c. Upper Culmination of the sun
d. Elongation of the Polaris
Vernal equinox
The point of zero declination on the ecliptic is at the:
a. Vernal equinox
b. Lower culmination of the sun
c. Upper Culmination of the sun
d. Elongation of the Polaris
Vernal equinox
The points of maximum dechination on the celestial sphere is
at the:
a. Elongation of the Polaris
b. Vernal equinox
c. Poles
d. Culmination of the sun
Poles
The points of zero declination on celestial sphere is:
a. Anywhere on the celestial equator
b. Anywhere on the equinoctial colure
C. Anywhere on the hour circle of the Polaris
d. Anywhere on the ecliptic
Anywhere on the celestial equator
The equinoctial colure is an hour circle passing to the:
a. Greenwich
b. Vernal Equinox
c. Polaris
d. Parallel of zero declination
Vernal Equinox
The right ascension ofa star is the angle measured along the:
a. Celestial equator eastward from the equinoctial colure to the
hour circle of the star
b. Celestial equator westward from the Star’s meridían to the
equinoctial colure
c. Ecliptic westward from the Star’s meridian to the equínoctial
colure
d. Ecliptic eastward from the Star’s meridian to the equinoctial
colure
Celestial equator eastward from the equinoctial colure to the
hour circle of the star
The meridian of a celestial body is a great circle that is
identical to a:
a. Meridian of zero declination passing thru Greenwich
b. Parallel of a declination of the celestial
c. Right ascension of the celestial body
d. Hour circle of the celestial body
Hour circle of the celestial body
The meridian of a celestial body is a great circle that is
identical to a:
a. The pole to the body along its hour circle
b. The equator to the body along its hour circle
c. The pole to the body along its vertical circle
d. The horizon to the body along its vertical circle
The pole to the body along its hour circle
The declination of a heavenly body is the spherical angle
measured from the:
a. Pole to the body along its vertical circle
b. Pole to the body along its hour circle
C. Equator to the body along its hour circle
d. Horizon to the body along its vertical circle
Equator to the body along its hour circle
The zenith distance of a heavenly body is the spherical angle
measured from the:
a. Zenith to the body along its vertical circle
b. Pole to the body along its hour circle
c. Equator to the body along its hour circle
d. Horizon to the body along its vertical circle
a. Zenith to the body along its vertical circle
The altitude of a star is the spherical angle measured from
the:
a. Pole to the body along its hour circle
b. Horizon to the body along its vertical circle
c. Equator to the body along its hour circle
d. Zenith to the body along its vertical circle
b. Horizon to the body along its vertical circle
The horizon system is an astronomic system using as
coordinates
a. Altitude and azimuth
b. Declination and horizontal angle
c. Declination and azimuth
d. Altitude and horizontal angle
a. Altitude and azimuth
The local hour angle of a star with respect to the place of
observation is the angle measured from the:
a. Meridian of the place westward to the hour circle of the star
along the equator
b. Meridian of the place eastward to the meridian of a star
along the equator
c. Meridian of the place eastward to the meridian of a star
along the horizon
d. Meriđian of the place westward to the meridian of the star
along the horizon
a. Meridian of the place westward to the hour circle of the star
along the equator
In the observation of the star for the determination of the
direction of a line, the position coordinates needed at a point
of observation is:
a. Polar distance
b. Longitude
c. Hour angle
d. latitude
d. latitude
In the observation of the star for the determination of the
direction of a line, the time of observation is recorded for
Computation of the variation of the
a. Horizontal angle of the star
b. Altitude of the star
c. Hour angle of the star
d. declination of the star
declination of the star
A star is at its instant of elongation when its:
a) Hour and vertical circles are normal
b) Hour circle is normal to the observers meridian
c) Vertical circle is normal to the observers meridian
d) Hour circle is normal to the equinoctial colure
a) Hour and vertical circles are normal
A star is at transit at a place when:
a. The vertical circle of a star coincides with the meridian of
the place
b. The meridian of a star coincides with the prime meridian
c. The meridian of a star coincides with the equinoctial
colure
d. The meridian of a star coincides with the vernal equinox
a. The vertical circle of a star coincides with the meridian of
the place
If e andf are the eccentricity and the flattening of the
spheroid then:
a. e^2 = 2f + f^2
b. e^2 = 2f +f^2
c. e=2f - f^2
d. e = 2f - f^2
e = 2f - f^2
The sidereal hour angle of a star is the:
a. Vernal equinox westward to the hour circle of the star
along the equator
b. Vernal equinox eastward to the meridian of the star along
the equator
C. Automnal equinox eastward to the meridian of the star
along the equator
d. Automnal equinox westward to the meridian of the star
along the equator
a. Vernal equinox westward to the hour circle of the star
along the equator
The Greenwich hour angle of a star is the angle measured
from the:
a. Prime meridian westward to the hour circle of a star along
the equator
b. Equinoctial colure castward to the meridian of a star along
the equator
c. Observers meridian westward to the meridian to the star
along the equator
d. Prime meridian eastward to the meridian to the star along
the equator
a. Prime meridian westward to the hour circle of a star along
the equator
The equator-right ascension system is an astronomic
coordinate system using as coordinates
a. Declination and azimuth
b. Declination and horizontal angle
c. Declination and right ascension
d. Declination and hour angle
c. Declination and right ascension
The equator-hour angle system is an astronomic coordínate
system using a coordinates:
a. Declination and hour angle
b. Declination and horizontal angle
c. Declination and azimuth
d. Declination and right ascension
a. Declination and hour angle
The three great circles involved in the formation in the
astronomic triangle of the celestial sphere are:
a. Observers meridian, hour and vertical circles of the star
b. Observers meridian, the equinoctial colure and ecliptic
c. Hour and vertical circles of the star and the ecliptic
d. Hour and vertical circles of the star and the equinoctial
colure
a. Observers meridian, hour and vertical circles of the star
