Wähle die Ordner aus, zu welchen Du "General Navigation T3" hinzufügen oder entfernen möchtest
17 Exakte Antworten
4 Text Antworten
21 Multiple Choice Antworten
Karte wurde gelöscht
The declination of the sun is defined as
The angular distance of the sun north or south of the celestial equator.
The arc from the celestial horizon to the sun measured along a vertical line perpendicular on the horizon.
The arc of the meridian of the sun measured from the nearest pole to the sun.
The arc along the celestial sphere from zenith to the sun.
By the term "transit" of a heavenly body it is understood that:
the body is passing the meridian of the observer or another specified meridian
the body is passing the anti meridian of the observer
the body is moving
the body is at the same celestial meridian as another body
Which is the highest latitude listed below at which the sun will rise above the horizon and set every day?
Observed from a position on the surface of the Earth the heavenly bodies seems to
move from east to west
move from east to west on the northern hemisphere
move from west to east on the southern hemisphere
Above what latitude is the sun in zenith at the spring equinox on the northern hemisphere?
N 66° 33'
N 23° 27'
The term "Sidereal Hour Angle" (SHA) is used
to define the position of a star on the celestial sphere without reference to Earth co-ordinates
to describe the time interval between two successive transits of the real apparent sun at the same meridian
to describe the position of a star with reference to the moon
Assuming mid-latitudes (40° to 50°N/S). At which time of year is the relationship between the length of day and night, as well as the rate of change of declination of the sun, changing at the greatest rate?
Spring equinox and autumn equinox
Summer solstice and spring equinox
Winter solstice and autumn equinox
Summer solstice and winter solstice
The sun's declination is
The sun's position relative to the plane of the Equator
The angular distance between the sun and the celestial North Pole
The distance between the sun and the horizon
The sun's position relative to the ecliptic
What is meant by "Aphelion"?
The point of the earth's orbit furthest away from the sun.
The point of the sun's orbit closest to the earth.
The point of the earth's orbit closest to the sun
The point of the sun's orbit furthest away from the earth.
If the LMT in position 54°40’S 000°00’ is 15:25, what is the GMT in position 54°40’S 180°00’?
The greatest difference between the length of the apparent solar day and the mean solar day occur
February and November
January and July
October and May
March and September
A day is defined as
the period elapsed between two successive transits of a heavenly body
the period from sunrise to sunset
the period from morning to evening
the period in which day flying is authorised
The mean sun
Moves with constant speed along the celestial equator
Has a declination equal to the apparent sun
"Mean time" has been introduced in order to
Introduce a constant measurement of time, independent of the daily variations in the movement of the Sun as observed from the Earth
Compensate for the irregularities of the speed of rotation of the Earth around it's axis
Save us the problem of adjusting our watches entering every leap year
Have one fixed time to be used within the border of a country
The International Date Line is located
At the 180°E/W meridian, or in the vicinity of this meridian
At all latitudes on the 180°E/W meridian
At the Greenwich meridian
The length of a apparent solar day is not constant because:
the Earth's speed of revolution in its orbit varies continuously, due to the orbit being elliptical
the plane of the Ecliptic and the plane of the Equator are inclined to each other
the Earth's speed of rotation is not the same at all latitudes
the Sun's declination is not constant
The "Equation of time"
states the difference in time of transit of the Mean sun and the Apparent sun any particular day
is used when calculating the difference between UTC and LMT
states the difference between celestial time and apparent time
is used to calculate mean time when standard time is known
A line that connects a planet to the sun sweeps out equal areas in equal times ==> Geschwindigkeit um die SOnne unterschiedlich zwischen Winter und Sommer ==> Geschwindigkeit nimmt zu, weil r klein wird und mc und 1 gleich gross sein müssen