Which one of the following statements best describes the Sun?
generates energy by nuclear fusion
located 10 AU from earth
orbiting the Solar System
located in the centre of the Milky Way
Which of the following sequences objects is in the correct order of decreasing distance
Moon, Venus, Saturn, Polaris, Andromeda galaxy
Venus, Saturn, Moon, Andromeda galaxy, Polaris
Polaris, Andromeda galaxy, Moon, Saturn, Venus
Andromeda galaxy, Saturn, Venus, Polaris, Moon
The nearest star to our solar system is alpha Centauri at 4.0x10^16 m (4.3 ly away). The diameter if the sun is 1.4x10^9 m. How many suns would it take to line up adjacent to each other in order to reach alpha Centauri?
2.8x10^7
5.6x10^6
2.8x10^25
There approximately 100 billion stars in our galaxy. If there 100 billion observable galaxies in our universe, what is a reasonable estimate for the total number ion the universe?
1.0X10^22
2.0x10^20
1.5x10^15
1.0x10^24
The distance to a super cluster galaxy might be
100 Mpc
10 Kpc
120 ly
10 AU
Approximately 100 Earths would fit inside Jupiter. This Jupiter’s radius must be __________ times larger that Earth’s radius
100
12
10
1000
A spherical particle in the ring of Saturn has radius of about 1m. The surface area of the particle in the area of radiation flow is
125 m^2
3.14 ^2
12.6 m^2
14 m^2
If the landing lights in Denver airport were switched on, then in one second these photons travel to:
New York (1580 km)
Alpha Centauri (40,000,000,000 000 km)
The Sun(150,000,000 km)
Moon (384,000 km)
Sirius the brightest star in the sky is about 9 ly away. If the speed of light became half of its present value, how far would Sirius be?
9 ly
18 ly
4.5 ly
32 ly
The Andromeda galaxy is about 2,000,000 ly away. Therefore light started its travel
1,000,000 y
2,000,000 y
Just a second ago
Can’t be determined
In the diagram, what is the diameter of Mercury?
about 240 km
about 2400 km
about 24,000 km
about 240,000 km
What is 5.7×107 the same as?
5.7 million
57 thousand
570 thousand
57 million
If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?
about 30 metres
about 10 metres
about 1 metre
smaller than the width of your hand
Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?
10 times
100 times
1000 times
10,000 times
What does the Solar System contain?
the Sun, its planets, and some smaller bodies
the Sun, galaxies, planets, and stars
the Sun, planets, moons, and stars
the Sun, planets, asteroids, and galaxies
What is the approximate diameter of the Earth?
1 AU
13,000 light-years
13,000 kilometres
1,000,000 kilometres
Which of the following is no longer considered a major planet?
Mercury
Uranus
Pluto
Saturn
Today the age of the universe is estimated in 13,700,000,000 years
1.37x10^6 y
1.37x10^7 y
1.37x10^8 y
1.37x10^9 y
Which statement best describes the Milky Way Galaxy?
It is a spiral galaxy
It is comprised of several smaller galaxies
It is about 1,000 light-years in diameter
It is type of supercluster
What is the implication if the distance to the nearest star is 4.2 light-years?
The star is 4.2 million AU away
The light we see left the star 4.2 years ago
The star must be very old
The star must be very young
If we say that an object is 1,000 light-years away, how does that affect how we see it?
We see it as it looked 1,000 years ago
We see it as it would appear to our ancestors 1,000 years ago
We see it as it looked 1,000 light-years ago
We see it as it is right now, but it appears 1,000 times dimmer
What is the average distance from Earth to the Sun?
1 ly
1 million km
1 billion km
How is a planet different from a star?
Planets are larger than stars.
Planets reflect light, while stars produce their own light.
Stars move faster in the sky than planets.
Planets are brighter than stars.
Which of the following is the smallest?
size of a typical planet
1 light-year
size of a typical galaxy
In the diagram, what is the diameter of Jupiter?
about 7.0 × 10^4 km
about 7.0 × 10^5 km
about 1.4 × 10^4 km
about 1.4 × 10^5 km
It takes light 1.3 seconds to travel from the Moon to Earth and 8 minutes for light to travel from the Sun to Earth. Which of the following statements is true?
The Sun is 6.2 times farther from Earth than the Moon
The Sun is 10 times farther from Earth than the Moon
The Sun is 370 times farther from Earth than the Moon
The Sun is 0.10 times farther from Earth than the Moon
How long does it take for light to travel from the Sun to Neptune?
several seconds
several minutes
several hours
several weeks
The speed of light is 3.0×105 km/s, and it takes 1.3 seconds for light to travel from the Moon to Earth. Based on this information, what is the distance from the Earth to the Moon?
390,000 km
230,000 km
3.9 km
2.3 km
Which of the following definitions best describes a constellation?
a group of very bright stars
the dividing line between the north and south celestial hemispheres
a region of the sky containing a certain star pattern
a group of very faint stars
Which of the following best describes the Big Dipper?
a faint star near Polaris
a constellation
an asterism
the North Star
What do stars in the same constellation have in common?
They must have been discovered at about the same time.
They are in the same part of the sky as seen from the Earth.
They probably formed at the same time
They must be part of the same cluster of stars in space.
Which of the following best describes Ursa Major (the Great Bear)?
another name for the Big Dipper
another name for the Seven Sisters
Which of the following statements correctly describes the relationship between stars and constellations?
Only the brighter stars are in constellations.
Only stars close to the ecliptic (the Earth's orbital plane) are located in constellations.
Only those stars that were visible to the ancient Greeks are located in constellations.
Every star is located in a constellation.
If the apparent visual magnitude of a star is 7.3, what does this tell us about the brightness of the star?
It is bright enough that it would be visible even during the day.
It is not visible with the unaided eye.
It is one of the brighter stars in the sky.
It appears faint because of its great distance from the Earth.
Which of the following describes the magnitude scale?
It can be used to indicate the apparent intensity of a celestial object.
It was used to determine the rate of precession.
It originated just after the telescope was invented.
It is no longer used today.
If the apparent visual magnitude of star A is 3.1, and the apparent visual magnitude of star B is 0.5, how do star A and star B compare in terms of apparent brightness as seen from Earth?
Star A is only slightly brighter than star B.
Star A is much brighter than star B.
Star A is fainter than star B.
Star A is about the same brightness as star B.
Which star in the table would be invisible to the unaided eye of an observer on Earth?
δ Dra
α CMa
Nim
α Cet
What aspect of an object depends on both the size of the object and the distance to the object?
angular diameter
apparent magnitude
proper motion
apparent brightness
What is the term for the point on the celestial sphere directly above an observer, no matter where on the Earth the observer is located?
south celestial pole
north celestial pole
nadir
zenith
Where is the zenith for an observer standing at a point on the Earth’s equator?
near the horizon and towards the south
near the horizon and towards the west
the position depends on the time of day
directly overhead
An 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?
from right to left
from left to right
counter-clockwise around the celestial pole
clockwise around the celestial pole
The Moon has an angular diameter of 0.5°. What is the Moon's angular diameter in minutes of arc?
0.5
1800
50
30
You point your finger toward the zenith right now, and then point there again six hours later. At both times, your finger was pointing in the same direction relative to one of the options below. Which one?
your horizon
the Sun
the ecliptic
the north celestial pole
For an observer in Valdivia, Chile, at a latitude of 39° South, what is the angle between the southern horizon and the south celestial pole?
39°
51°
23.5°
45°
For an observer in Waterloo, at a latitude of 43° North, what is the angle between the northern horizon and the north celestial pole?
36°
74°
43°
What languages do the standard constellation names come from?
Greek and Latin
Greek and Arabic
Arabic and Sanskrit
Latin and Arabic
What causes the precession of the Earth’s rotation axis?
the impacts of asteroids
the force of gravity from the Sun and Jupiter on the Earth–Moon system
the magnetic field of the Earth
the force of gravity from the Sun and Moon on the Earth's equatorial bulge
A star is on the north point of the horizon. Where will the star be in 6 and 12 hours later
A
B
C
D
The 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
15 deg per day eastward
1 deg per day eastward
not at all-the sun does not appear to move
1 deg per day westward
15 deg per day westward
Which 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 person in Nashville , TN observes Venus in the western part of the horizon. Six hours later Venus will be
high in the south
low in the south
nearly overhead
not visible
A person in Denver Colorado observes Jupiter in the eastern horizon right after the sunset. Where would the planet be after six hours?
low in the west
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