Question 1

An observer on Earth's equator would find
A) Polaris directly overhead.
B) Polaris 40$\degree$above the northern horizon.
C) that the celestial equator coincides with the horizon.
D) the celestial equator passing directly overhead.
E) that the ecliptic coincides with the horizon.

Accepted Answer

At the Earth's equator, the celestial equator passes directly overhead, aligning with the observer's zenith.

Question 2

-Based on the information in Table 2-1,what is the ratio of the intensity of $\delta$ Dra to that of Nim?
A) 2.512
B) 5
C) 8.07
D) 11.14
E) 100

Accepted Answer

E

Question 3

Seen from the northern latitudes,the star Polaris
A) is never above the horizon during the day.
B) always sets directly in the west.
C) is always above the northern horizon.
D) is never visible during the winter.
E) is the brightest star in the sky.

Accepted Answer

Polaris, also known as the North Star, is located very close to the north celestial pole. Therefore, from northern latitudes, it is always above the northern horizon, making it a useful navigational tool for determining direction.

Question 4

Most of the constellations in use today originated in ____ mythology.
A) Greek.
B) Middle Eastern
C) Both answers (a)and (b)

Accepted Answer

Many constellations have origins in both Greek and Middle Eastern mythology, as Greek astronomers adopted and adapted earlier Middle Eastern star groupings and myths.

Question 5

The apparent visual magnitude of a star is 7.3.This tells us that the star is
A) one of the brighter stars in the sky.
B) bright enough that it would be visible even during the day.
C) not visible with the unaided eye.
D) very close to Earth.

Accepted Answer

Stars with an apparent magnitude greater than 6 are not visible to the unaided eye under normal conditions.

Question 6

Star A has an apparent visual magnitude of 13.4,and star B has an apparent visual magnitude of 15.4.Star A is ____ than star B.
A) 2 times fainter
B) 2 times brighter
C) 6.3 times fainter
D) 6.3 times brighter
E) 29.8 times fainter

Accepted Answer

The apparent magnitude scale is logarithmic, with a difference of 5 magnitudes corresponding to a brightness factor of 100. A difference of 2 magnitudes (15.4 - 13.4) therefore corresponds to a brightness factor of approximately 6.3, making star A 6.3 times brighter than star B.

Question 7

-Which star in Table 2-1 would appear the brightest to an observer on Earth?
A) ($\alpha$Cet)
B) ($\alpha$ CMa)
C) Nim
D) ($\rho$ Per)
E) ($\delta$Dra)

Accepted Answer

The star (F1F1F1S1F1F1F10 CMa) is Sirius, which is the brightest star in the night sky as seen from Earth.

Question 8

Polaris is a second magnitude star,and Phi Pegasi is about 16 times fainter than Polaris.What is the approximate magnitude of Phi Pegasi?
A) 18
B) (-14)
C) 3
D) (-3)
E) 5

Accepted Answer

The answer of Polaris is a second magnitude star,and Phi...

Question 9

The names of stars usually come from
A) ancient Arabic.
B) ancient English.
C) Latin.
D) Russian.
E) Chinese.

Accepted Answer

Many star names are derived from ancient Arabic due to the significant contributions of Arabic astronomers during the Middle Ages.

Question 10

An observer in the Northern Hemisphere watches the sky for several hours.Due to the motion of Earth,this observer notices that the stars near the north celestial pole appear to move
A) counter clockwise.
B) clockwise.
C) from left to right.
D) from right to left.
E) nearly vertically upward.

Accepted Answer

In the Northern Hemisphere, stars near the north celestial pole appear to move counterclockwise due to Earth's rotation.

Question 11

-Which star in Table 2-1 would not be visible to the unaided eye of an observer on Earth?
A) ($\alpha$ Cet)
B) ($\alpha$ CMa)
C) Nim
D) ($\rho$Per)
E) ($\delta$ Dra)

Accepted Answer

"Nim" is not a standard designation for a star, suggesting it may not be a real or well-known star, and thus not visible to the unaided eye.

Question 12

A constellation must consist of a number of stars,all
A) at the same distance from the Earth.
B) at various different distances from the Earth.
C) within a boundary in the same general angular area of the sky.
D) Wrong! Constellations are made of planets only.

Accepted Answer

A constellation is a group of stars that form a recognizable pattern in the night sky. The stars in a constellation are not necessarily at the same distance from the Earth, but they appear to be close together because they are in the same general direction.

Question 13

____ is the brightest star in the constellation of Ursa Majoris.
A) ($\beta$ Ursa Majoris)
B) ($\gamma$ Ursa Majoris)
C) ($\alpha$ Ursa Majoris)
D) Wrong! Ursa Majoris is the name of the brightest star.

Accepted Answer

The correct answer is (F1F1F1S1αF1F1F10 Ursa Majoris). This is because (F1F1F1S1αF1F1F10 Ursa Majoris), also known as Dubhe, is the second-brightest star in the constellation of Ursa Majoris and is often used as a navigational star due to its prominence in the night sky. (F1F1F1S1βF1F1F10 Ursa Majoris) and (F1F1F1S1γF1F1F10 Ursa Majoris) are also bright stars in the constellation, but (F1F1F1S1αF1F1F10 Ursa Majoris) is the brightest. D is incorrect as Ursa Majoris is not the name of any star.

Question 14

In one way of naming stars,a ____ letter indicates its brightness relative to the other stars in the constellation.
A) English
B) Arabic
C) Greek
D) Cyrillic

Accepted Answer

The answer of In one way of naming stars,a ____...

Question 15

The ____ is the point on the celestial sphere directly above any observer.
A) north celestial pole
B) south celestial pole
C) zenith
D) celestial equator
E) asterism

Accepted Answer

The zenith is the point on the celestial sphere that is directly above an observer at any given location.

Question 16

The magnitude scale
A) originated just after the telescope was invented.
B) can be used to indicate the apparent intensity of a celestial object.
C) is used to measure the temperature of a star.
D) was used to determine the rate of precession.

Accepted Answer

The answer of The magnitude scale
A) originated just after the...

Question 17

You live at a latitude of 73$\degree$ N.What is the angle between the northern horizon and the north celestial pole?
A) 73$\degree$
B) 27$\degree$
C) 17$\degree$
D)5$\degree$

Accepted Answer

The angle between the northern horizon and the north celestial pole is equal to the latitude of the observer.

Question 18

The apparent visual magnitude of a star is a measure of the star's
A) size.
B) intensity.
C) distance.
D) color.
E) temperature.

Accepted Answer

The apparent visual magnitude of a star is a measure of how bright the star appears in our sky. It is determined by the star's intensity or amount of light it emits. Choice A (size), C (distance), D (color), and E (temperature) can all affect a star's brightness, but they are not directly measured by the apparent visual magnitude.

Question 19

You live at a latitude of 39$\degree$S.What is the angle between the southern horizon and the south celestial pole?
A) 45$\degree$
B) 23.5$\degree$
C) 39$\degree$
D) 51$\degree$
E) The answer depends on the day of the year.

Accepted Answer

The angle between the southern horizon and the south celestial pole is equal to the observer's latitude in the southern hemisphere, which is 39 degrees in this case.

Question 20

The star Vega has an apparent visual magnitude of 0.03,and the star HR 4374 has an apparent visual magnitude of 4.87.It has been determined that both stars are at the same distance from Earth.What does this information tell us about the two stars?
A) Vega must be closer to Earth than HR 4374.
B) Vega must be farther from Earth than HR 4374.
C) Vega must produce less energy than HR 4374.
D) Vega must produce more energy than HR 4374.
E) Vega will appear fainter to us than HR 4374.

Accepted Answer

Since both stars are at the same distance, the star with the lower apparent magnitude (Vega) is brighter and thus must produce more energy than HR 4374.

Quiz 2: A Users Guide to the Sky

An observer on Earth's equator would find

$-Based on the information in Table 2-1,what is the ratio of the intensity of \delta Dra to that of Nim? A) 2.512 B) 5 C) 8.07 D) 11.14 E) 100$ -Based on the information in Table 2-1,what is the ratio of the intensity of $\delta$ Dra to that of Nim?

Seen from the northern latitudes,the star Polaris

Most of the constellations in use today originated in ____ mythology.

The apparent visual magnitude of a star is 7.3.This tells us that the star is

Star A has an apparent visual magnitude of 13.4,and star B has an apparent visual magnitude of 15.4.Star A is ____ than star B.

$-Which star in Table 2-1 would appear the brightest to an observer on Earth? A) ( \alpha Cet) B) ( \alpha CMa) C) Nim D) ( \rho Per) E) ( \delta Dra)$ -Which star in Table 2-1 would appear the brightest to an observer on Earth?

Polaris is a second magnitude star,and Phi Pegasi is about 16 times fainter than Polaris.What is the approximate magnitude of Phi Pegasi?

The names of stars usually come from

An observer in the Northern Hemisphere watches the sky for several hours.Due to the motion of Earth,this observer notices that the stars near the north celestial pole appear to move

$-Which star in Table 2-1 would not be visible to the unaided eye of an observer on Earth? A) ( \alpha Cet) B) ( \alpha CMa) C) Nim D) ( \rho Per) E) ( \delta Dra)$ -Which star in Table 2-1 would not be visible to the unaided eye of an observer on Earth?

A constellation must consist of a number of stars,all

____ is the brightest star in the constellation of Ursa Majoris.

In one way of naming stars,a ____ letter indicates its brightness relative to the other stars in the constellation.

The ____ is the point on the celestial sphere directly above any observer.

The magnitude scale

You live at a latitude of 73 $\degree$ N.What is the angle between the northern horizon and the north celestial pole?

The apparent visual magnitude of a star is a measure of the star's

You live at a latitude of 39 $\degree$ S.What is the angle between the southern horizon and the south celestial pole?

The star Vega has an apparent visual magnitude of 0.03,and the star HR 4374 has an apparent visual magnitude of 4.87.It has been determined that both stars are at the same distance from Earth.What does this information tell us about the two stars?