Quiz
Chapter 2
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Perguntas do quiz (41)
1Which of the following definitions best describes a constellation?
- Aa region of the sky containing a certain star pattern
- Ba group of very bright stars
- Ca group of very faint stars
- Dthe dividing line between the north and south celestial hemispheres
2Which of the following best describes the Big Dipper?
- Aan asterism
- Ba faint star near Polaris
- Cthe North Star
- Da constellation
3What do stars in the same constellation have in common?
- AThey probably formed at the same time
- BThey must be part of the same cluster of stars in space
- CThey must have been discovered at about the same time
- DThey are in the same part of the sky as seen from the Earth
4What languages do the standard constellation names come from?
- AGreek and Latin
- BLatin and Arabic
- CGreek and Arabic
- DArabic and Sanskrit
5Refer to Table 2-1. Which star in the table would appear brightest to an observer on Earth?
- Aδ Dra
- Bα Cet
- CNim
- Dα CMa
6What causes the precession of the Earth’s rotation axis?
- Athe force of gravity from the Sun and Moon on the Earth's equatorial bulge
- Bthe force of gravity from the Sun and Jupiter on the Earth–Moon system
- Cthe magnetic field of the Earth
- Dthe impacts of asteroids
7A star is on the north point of the horizon. Where will the star be in 6 and 12 hours later
- AD
- BC
- CA
- DB
8The Earth revolves in a counter clockwise direction around the sun at about 1 deg/day (360 deg and 365 days). Then this motion makes the sun to appear moving
- A1 deg per day eastward
- B1 deg per day westward
- C15 deg per day eastward
- D15 deg per day westward
- Enot at all-the sun does not appear to move
9Which of the following diagrams represent the area of the sky where an ancient Greek astronomer could observe the planets? (Ancient Greeks knew the 5 planets, in fact the word planet comes from the Greek word “planetes” = wanderer.)
- A
- B
- C
- A
10A person in Nashville , TN observes Venus in the western part of the horizon. Six hours later Venus will be
- Alow in the south
- Bhigh in the south
- Cnot visible
- Dnearly overhead
11A person in Denver Colorado observes Jupiter in the eastern horizon right after the sunset. Where would the planet be after six hours?
- Alow in the south
- Bhigh in the south
- Cnot visible
- Dnearly overhead
- Elow in the west
12An observer in Lincoln Nebraska (latitude= 41 deg N) sees three stars rising in the eastern horizon. Which of these stars might later on pass through zenith point?
- AA
- BB
- CC
13How many moons can be stacked from the horizon to the zenith?
- A90
- B360
- C180
- D40
14Where is an observer's nadir?
- Athe east point on the observer's horizon
- Bthe north point on the observer's horizon
- Cthe point directly opposite the observer's zenith
- Dthe point directly opposite the north celestial pole
15If the apparent visual magnitude of a star is 7.3, what does this tell us about the brightness of the star?
- AIt is one of the brighter stars in the sky
- BIt is bright enough that it would be visible even during the day
- CIt is not visible with the unaided eye
- DIt appears faint because of its great distance from the Earth
16The 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 the Earth. What does this information tell us about the two stars?
- ATogether the two stars would have a magnitude of 4.9
- BVega must produce less energy per second than HR 4374
- CVega must produce more energy per second than HR 4374
- DVega will appear fainter to us than HR 4374
17What is the apparent visual magnitude of a star a measure of?
- Athe star’s size as perceived by human eyes on Earth
- Bthe star’s temperature as perceived by human eyes on Earth
- Cthe star’s colour as seen by human eyes on Earth
- Dthe star’s brightness as seen by human eyes on Earth
18Which of the following is equivalent to one-3,600th of a degree?
- Aprecession
- Bsecond of arc
- Cminute of arc
- Dangular diameter
19What is the term for the point on the celestial sphere directly above an observer, no matter where on the Earth the observer is located?
- Anorth celestial pole
- Bsouth celestial pole
- Czenith
- Dnadir
20Where is the zenith for an observer standing at a point on the Earth’s equator?
- Adirectly overhead
- Bnear the horizon and towards the south
- Cnear the horizon and towards the west
- Dthe position depends on the time of day
21If the Earth had an orbital tilt of 0 degrees (obliquity) then
- AThe direct rays of the sun would shine on the equator
- BDay and night would be 12 long every day everywhere on the Earth
- CAn observer at the equator would see the sun pass at zenith every day
- DThere would not be no seasons
- EAll of the above
22The orbit of the Earth had an eccentricity 0.017. If the eccentricity increased to 0.65 what would happened to the Earth’s seasons?
- AMore intense seasons
- BLess intense seasons
- CNo appreciable change
23On an imaginary planet that has an orbital tilt of 32 degrees, its corresponding Tropic of Cancer can be found at the latitude of
- A23.5° N
- B32° N
- C58° N
- D66.5° N
24Which of the following locations are closer to the South Celestial Pole?
- A(RA= 14h Declination=+88°)
- B(RA= 14h Declination=-88°)
- C(RA= 23h Declination=2°)
- D(RA= 18h Declination=-66°)
25Based on your computer clock lets say that today is August 31, 2015 the sun is
- ANorth on the Celestial equator moving North
- BSouth on the Celestial equator moving South
- CNorth on the Celestial Equator moving South
- DSouth on the Celestial equator moving North
26How often is the sun at zenith for an observer at the equator?
- ANever
- BTwice per year
- C12 times per year
- DEvery day
27An observer in the northern hemisphere watches the sky for several hours. Due to the motion of the Earth, this observer notices that the stars near the north celestial pole appear to move. What pattern does this apparent movement follow?
- Aclockwise around the celestial pole
- Bcounter-clockwise around the celestial pole
- Cfrom left to right
- Dfrom right to left
28If an observer travels north, toward higher latitudes, how does the number of circumpolar stars that he or she sees in the sky change?
- Aremains constant
- Bdecreases
- Cincreases
- Dalso depends on the longitude of the observer
29If you were standing at the Earth's North Pole, which of the following would be located at the zenith?
- Athe nadir
- Bthe star Vega
- Cthe celestial equator
- Dthe north celestial pole
30How much of the night sky lies north of the celestial equator?
- ALess than half, because of the tilt of the equator to the ecliptic plane.
- BMore than half, because of the precession of the poles
- CExactly half
- DAll of the night sky
31Seen from Winnipeg (latitude 50 degrees North), where is the star Polaris in the sky?
- Adirectly overhead
- B40 degrees above the horizon
- C50 degrees above the horizon
- Dthe position depends on the time of day
32For an observer in Pond Inlet, Nunavut, at a latitude of 73° North, what is the angle between the northern horizon and the north celestial pole?
- A17°
- B23.5°
- C27°
- D73°
33For an observer in Oberon Bay, Australia, at a latitude of 39° South, what is the angle between the southern horizon and the south celestial pole?
- A23.5°
- B39°
- C45°
- D51°
34If the north celestial pole appears on your horizon, what is your latitude?
- A0°
- B45° N
- C90° N
- D90° S
35If the north celestial pole appears on your horizon, what is your latitude?
- A50° N
- B50° S
- C90° N
- D90° S
36An observer in the northern hemisphere takes a time exposure photograph of the night sky. If the illustration depicts the photograph taken by the observer, which direction was the camera pointing?
- Adue north
- Bdue south
- Cdue west
- Dstraight up, directly overhead
37An observer in the northern hemisphere takes a time exposure photograph of the night sky. If the illustration depicts the photograph taken by the observer, which direction was the camera pointing?
- Adue north
- Bdue south
- Cdue east
- Dstraight up, directly overhead
38An observer in the southern hemisphere takes a time exposure photograph of the night sky. If the illustration depicts the photograph taken by the observer, which direction was the camera pointing?
- Adue north
- Bdue south
- Cdue east
- Ddue west
39Where in the sky would an observer at the Earth's equator see the celestial equator?
- AThe celestial equator would be at 45 degrees above the northern horizon
- BThe celestial equator would be at 45 degrees above the southern horizon
- CThe celestial equator would coincide with the horizon
- DThe celestial equator would be directly overhead
40Which of the following best defines the ecliptic?
- Athe plane that is perpendicular to the Earth's axis of rotation
- Bthe projection of the Earth's equator onto the sky
- Cthe path traced out by the Moon in our sky in one month against the background stars
- Dthe path traced out by the Sun in our sky over one year against the background stars
41Which of the following describes a concept very similar to latitude?
- Aright ascension
- Bdeclination
- Cmagnitude
- Dmeridian
Informações
- Descrição
- Astronomy
- Autor
- Ryan Tram
- Idioma
- English
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