Question 1

The coordinate used in the terrestrial coordinate system to indicate angular distance north or south of the equator is&#10;A)Altitude&#10;B)Latitude&#10;C)Longitude&#10;D)Azimuth

Accepted Answer

Latitude measures angular distance north or south of the equator in the terrestrial coordinate system. Altitude measures the angle of an object above the horizon, longitude measures angular distance east or west of the prime meridian, and azimuth measures the angle between a celestial object and the observer's horizon in a horizontal coordinate system.

Question 2

The point in the sky that is located 90 degrees from the celestial horizon is the&#10;A)Equator&#10;B)Pole&#10;C)Zenith&#10;D)Node

Accepted Answer

The point in the sky that is located 90 degrees from the celestial horizon is the zenith. This is the point directly overhead an observer and is directly opposite to the nadir. The equator is a line on the celestial sphere, the pole is either the north or south celestial pole, and a node is a point where the orbit of a celestial object intersects with a reference plane.

Question 3

The angular distance measured eastward from north around the horizon is&#10;A)Latitude&#10;B)Declination&#10;C)Azimuth&#10;D)Right ascension

Accepted Answer

The angular distance measured eastward from north around the horizon is called azimuth. Latitude refers to the angle between the equatorial plane and a line perpendicular to the Earth's surface at a particular location. Declination refers to the angle between the celestial equator and a celestial object. Right ascension is a celestial coordinate used to measure eastward movement across the celestial sphere.

Question 4

A line on the celestial sphere that divides it into two equal halves is a&#10;A)Coordinate&#10;B)Great circle&#10;C)Second of arc&#10;D)Circumpolar circle

Accepted Answer

A line on the celestial sphere that divides it into two equal halves is called a great circle. A great circle is the largest circle that can be drawn on the surface of a sphere and it divides the sphere into two equal halves. Examples of great circles on the celestial sphere include the celestial equator and the ecliptic.

Question 5

What is the latitude at the equator of the Earth?&#10;A)0 degrees&#10;B)90 degrees&#10;C)180 degrees&#10;D)270 degrees

Accepted Answer

The equator is the imaginary circle around the Earth that is equidistant from the North and South poles, and it is located at 0 degrees latitude.

Question 6

What is the latitude of the North Pole of the Earth?&#10;A)0 degrees&#10;B)90 degrees&#10;C)180 degrees&#10;D)270 degrees

Accepted Answer

The latitude of the North Pole is 90 degrees because it is located at the northernmost point on the Earth's surface, which corresponds to the intersection of the Earth's rotational axis with its surface. Latitude measures the angle between the equator (0 degrees latitude) and a given point on the Earth's surface, with 90 degrees north being the point at the North Pole.

Question 7

The east-west coordinate in the terrestrial coordinate system is&#10;A)Altitude&#10;B)Azimuth&#10;C)Latitude&#10;D)Longitude

Accepted Answer

The east-west coordinate in the terrestrial coordinate system is longitude. Longitude is measured in degrees east or west of the Prime Meridian, which is an imaginary line that passes through the Royal Observatory in Greenwich, London, England. Latitude is the north-south coordinate, altitude is the height above sea level, and azimuth is the horizontal angle between a celestial body and the observer's meridian.

Question 8

A finger,held at arm's length,fills an angle of about&#10;A)50 degrees&#10;B)10 degrees&#10;C)2 degrees&#10;D)One-tenth of a degree

Accepted Answer

The angle subtended by a finger at arm's length is about 2 degrees. This is a well-known approximation used in astronomy, photography, and other fields to estimate angles in the sky. In general, the angle depends on the size of the finger, the distance from the eye to the finger, and the optics of the eye. However, for most people, a finger held at arm's length will fill an angle of about 2 degrees.

Question 9

The Moon's angular diameter is &#189; degree.What is the Moon's angular size in seconds of arc?&#10;A)&#189;&#10;B)30&#10;C)300&#10;D)1800

Accepted Answer

The Moon's angular diameter of ½ degree can be converted into seconds of arc by multiplying by 3600 (since there are 3600 arcseconds in a degree), resulting in 1800 arcseconds.

Question 10

How many seconds of arc are there in a degree?&#10;A)3600&#10;B)206265&#10;C)60&#10;D)360

Accepted Answer

There are 3600 seconds of arc in a degree, as each degree is divided into 60 minutes and each minute into 60 seconds, resulting in 60 x 60 = 3600 seconds.

Question 11

The angular size of the Moon is about&#10;A)&#189; second of arc&#10;B)&#189; minutes of arc&#10;C)&#189; degree&#10;D)&#189; radian

Accepted Answer

The answer of The angular size of the Moon is...

Question 12

What are the altitude and azimuth (in degrees)of a star that is setting in the southwest?&#10;A)Altitude 90,azimuth 90&#10;B)Altitude 30,azimuth 180&#10;C)Altitude 0,azimuth 240&#10;D)Altitude 45,azimuth 360

Accepted Answer

The answer of What are the altitude and azimuth (in...

Question 13

The azimuth and altitude of an object located due north and on the horizon are&#10;A)Azimuth 0 degrees,altitude 0 degrees&#10;B)Azimuth 90 degrees,altitude 90 degrees&#10;C)Azimuth 90 degrees,altitude 0 degrees&#10;D)Azimuth 0 degrees,altitude 180 degrees

Accepted Answer

The answer of The azimuth and altitude of an object...

Question 14

Which of the following would be the coordinates of a star that is rising in the northeast?&#10;A)Azimuth 180 degrees,altitude 90 degrees&#10;B)Azimuth 145 degrees,altitude 0 degrees&#10;C)Azimuth 60 degrees,altitude 0 degrees&#10;D)Azimuth 75 degrees,altitude 90 degrees

Accepted Answer

The answer of Which of the following would be the...

Question 15

The north circumpolar region of the sky is centered approximately on&#10;A)The zenith&#10;B)The horizon&#10;C)Polaris&#10;D)The Sun

Accepted Answer

The answer of The north circumpolar region of the sky...

Deck 1: Journeys Start