Imagine that the Big Dipper crosses the meridian, the point straight overhead, at about 10:00 pm tonight. Where will the big dipper be in the sky at 1:00 am tonight?

Imagine that the Big Dipper crosses the meridian, the point straight overhead, at about 10:00 pm tonight. Where will the big dipper be in the sky at...

Imagine that the Big Sipper crosses the meridian, the point straight overhead, at about 10:00 pm tonight, Where will be Dipper be in the sky at 1:00 am tonight?

Imagine that the Big Sipper crosses the meridian, the point straight overhead, at about 10:00 pm tonight, Where will be Dipper be in the sky at 1:00...

If the light takes 8 minutes to reach Earth from the sun and 5 hours to reach Pluto, what is the distance from the sun to pluto?

If the light takes 8 minutes to reach Earth from the sun and 5 hours to reach Pluto, what is the distance from the sun to pluto? A) 5.2 AU B) 37.1...

Why is the sky coordinate right ascension (RA) referenced to 1950.0 AD in most star atlases?

Why is the sky coordinate right ascension (RA) referenced to 1950.0 AD in most star atlases? A) Celestial coordinates were first conceived by astronomers...

The moon lies 384,000 km from Earth, and the Sun lies 150,000,000 km away. If both have the same angular size as seen from Earth, how many times larger (in diameter) than the Moon is the Sun?

The moon lies 384,000 km from Earth, and the Sun lies 150,000,000 km away. If both have the same angular size as seen from Earth, how many times larger...

If Earth orbited the Sun in 9 months rather than 12, then, compared with a sidereal day, a solar day would be

If Earth orbited the Sun in 9 months rather than 12, then, compared with a sidereal day, a solar day would be A) Longer B) Shorter C) Unchanged ...

Pensacola, Florida lies at a latitude of 30 degrees north. If you're in Pensacola, where is Polaris in its sky?

Pensacola, Florida lies at a latitude of 30 degrees north. If you're in Pensacola, where is Polaris in its sky? A) 60 degrees high in the north B)...

The last quarter phase of the Moon:

The last quarter phase of the Moon: A) Rises at sunrise B) Sets at sunrise C) Crosses the meridian at sunrise D) Rises at sunset E) Sets at suns...

Driving eastward just before sunrise, if you observe the Moon in the eastern sky, its phase must be:

Driving eastward just before sunrise, if you observe the Moon in the eastern sky, its phase must be: A) Full moon B) First quarter C) Waxing Gibbous D)...

Why is there a two day difference the sidereal and synodic months?

Why is there a two day difference the sidereal and synodic months? A) The moon speedup at perigee, and slows down at apogee B) The sidereal day is...

If the new moon fell on March 2nd, what is the moon's phase on March 14th?

If the new moon fell on March 2nd, what is the moon's phase on March 14th? A) Waxing crescent B) First quarter C) Waxing gibbous D) full E) Waning...

Which statement about the first quarter moon is FALSE?

Which statement about the first quarter moon is FALSE? A) It rises about noon B) From the Earth, its appears 25% sunlit C) It is the half moon of...

If the moon rose tonight at 6 pm, then tomorrow it will rise about:

If the moon rose tonight at 6 pm, then tomorrow it will rise about: A) The same time B) 7 PM C) 5 PM D) Dawn E) midnight Answer: ...

When the sun rises, it is located in the constellation Gemini. When the Sun sets later that same day, it will be:

When the sun rises, it is located in the constellation Gemini. When the Sun sets later that same day, it will be: A) In the constellation Aries B)...

You note that a particular star is directly overhead, It will be directly overhead again in:

You note that a particular star is directly overhead, It will be directly overhead again in: A) 1 hour B) 12 hours C) 23 hours 56 minutes D) 24 hours E)...

Which statement about the ecliptic is false?

Which statement about the ecliptic is false? A) The sun appears to move about a degree per day eastward long it B) It is tilted 23.5 degrees with...

From a location in the United States of America, a star is observed to be rising due East. Where will this star be located 6 hours later?

From a location in the United States of America, a star is observed to be rising due East. Where will this star be located 6 hours later? A) Directly...

The place the Sun stops its northward motion along the ecliptic is the:

The place the Sun stops its northward motion along the ecliptic is the: A) equator B) prime meridian C) summer solstice D) vernal equinox E) node...

As it orbits the Earth, the Moon appears to move eastward about is own diameter every hour.

As it orbits the Earth, the Moon appears to move eastward about is own diameter every hour. A) True B) False C) Not enough information in the question...

Considering the Moon's phases, everyone on Earth sees

Considering the Moon's phases, everyone on Earth sees A) The same phase in 24 hours B) Different phases in 24 hours C) A lunar eclipse once a month D)...

How long does it take for the Moon to go around the ecliptic?

How long does it take for the Moon to go around the ecliptic? A) One day B) One hour C) One week D) One month E) One year Answer: ...

The vernal equinox marks the beginning of

The vernal equinox marks the beginning of A) Summer B) Fall C) Winter D) Spring E) SEC football Answer: ...

What causes Earth's seasons?

What causes Earth's seasons? A) Earth's rotation axis wobbles B) The greenhouse effect C) Earth's rotational axis is tilted 23.5 degrees D) Earth...

How long does it take the Sun to complete one circuit of the ecliptic?

How long does it take the Sun to complete one circuit of the ecliptic? A) One hour B) One day C) One month D) One year E) One decade Answer:&n...

In a spectroscopic binary system, the star showing the larger blue shift is:

In a spectroscopic binary system, the star showing the larger blue shift is: A) Cooler and receding the fastest B) Less massive of the pair and receding...

Which of the following is the most common type of star?

Which of the following is the most common type of star? A) High mass main sequence B) Low mass main sequence C) White dwarfs D) Red giants E) Blue...

Compared to the size of the Sun, in what range of sizes are nearly all stars found?

Compared to the size of the Sun, in what range of sizes are nearly all stars found? A) .5 to 2 solar radii B) 0.1 to 1.0 solar radii C) 0.5 to 50...

Stars that have masses similar to the Sun's, and sizes similar to the Earth are:

Stars that have masses similar to the Sun's, and sizes similar to the Earth are: A) Main sequence stars B) White dwarfs C) Red giants D) Red dwarfs E)...

Star A is a main sequence star of spectral type G5 and star B is a red giant of spectral type K2. Which statement below is correct?

Star A is a main sequence star of spectral type G5 and star B is a red giant of spectral type K2. Which statement below is correct? A) Star A appears...

What physical property of a star does the spectral type measure?

What physical property of a star does the spectral type measure? A) Density B) Luminosity C) Temperature D) Mass E) Composition Answer: ...

What are the two most important intrinsic properties used to classify stars?

What are the two most important intrinsic properties used to classify stars? A) Mass and age B) Luminosity and surface temperature C) Distance and...

In comparing first magnitude Deneb with second magnitude Polaris, we find that:

In comparing first magnitude Deneb with second magnitude Polaris, we find that: A) Polaris is in reality much more luminous B) Deneb must be much...

The speed of light is 3.00 x 10^8 m/s. If 2.00 kg of mass is converted to energy, how much energy will be produced?

The speed of light is 3.00 x 10^8 m/s. If 2.00 kg of mass is converted to energy, how much energy will be produced? A) 1.80 x 10^17 J B) 6.00 x 10^8...

What natural barrier tries to prevent two protons from combining?

What natural barrier tries to prevent two protons from combining? A) Dark energy B) Antigravity C) Electromagnetic repulsion D) The weak nuclear...

In the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen. What happens to the "lost" mass?

In the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen. What happens to the "lost" mass? A) It is recycled...

The critical temperature the core must reach for a star to shine by fusion is:

The critical temperature the core must reach for a star to shine by fusion is: A) 5,800 K B) 11,000 K C) 127,000 K D) 10 million K E) 100 million...

Suppose a large solar flare is detected optically. How long until radio interference on Earth arrives?

Suppose a large solar flare is detected optically. How long until radio interference on Earth arrives? A) Simultaneously B)8.5 minutes later C) About...

During a period of high solar activity, the corona:

During a period of high solar activity, the corona: A) Disappears B) Is more irregular C) Cools almost to the temperature of the photosphere D) Becomes...

How would sunspots appear if you could magically remove them from the Sun?

How would sunspots appear if you could magically remove them from the Sun? A) They would appear blue-white, like Sirius but brighter B) Because sunspots...

As the Sun rotates, an individual sunspot can be tracked across its face. From eastern to western limb, this takes about:

As the Sun rotates, an individual sunspot can be tracked across its face. From eastern to western limb, this takes about: A) 12 hours B) A week C)...

What is it about the Sun's corona that astronomers don't understand?

What is it about the Sun's corona that astronomers don't understand? A) No ne knows why that part of the Sun's atmosphere does not drift away into...

From where does most of the solar wind flow?

From where does most of the solar wind flow? A) Granules B) Sunspots C) Flares D) Prominences E) Coronal holes Answer: ...

When the chromosphere can be seen during a solar eclipse, it appears:

When the chromosphere can be seen during a solar eclipse, it appears: A) Invisible B) Violet C) Blue D) Yellow E) Red Answer: ...

Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which statement below is correct?

Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which...

In general, the narrower the spectral line of a star:

In general, the narrower the spectral line of a star: A) The cooler the star is B) The denser the star is C) The hotter the star is D) The smaller...

Figure 17.15 in the textbook ("H-R Diagram of Bright Stars") shows Vega and Arcturus at approximately the same level on the vertical axis. This means that Arcturus must be

Figure 17.15 in the textbook ("H-R Diagram of Bright Stars") shows Vega and Arcturus at approximately the same level on the vertical axis. This means...

Two red stars have surface temperatures of 3000 K, but Star A's luminosity is about 5% of the Sun's and Star B's luminosity is about 32,000 times the luminosity of the Sun. How much bigger is star B than star A?

Two red stars have surface temperatures of 3000 K, but Star A's luminosity is about 5% of the Sun's and Star B's luminosity is about 32,000 times the...

What is proper motion?

What is proper motion? A) It is the annual apparent motion of a star across the sky. B) It is the motion of a star towards or away from us, revealed...

T/F About 500 stars can be seen by the naked eye from somewhere on Earth.

T/F About 500 stars can be seen by the naked eye from somewhere on Earth. Answer: Tr...

According to Figure 17.13 in the textbook ("H-R Diagram of Prominent Stars"), Barnard's Star must be

According to Figure 17.13 in the textbook ("H-R Diagram of Prominent Stars"), Barnard's Star must be A) Bluer than Proxima Centauri B) Larger than...

Pluto's apparent magnitude is approximately 14. According to Figure17.7 in the textbook ("Apparent Magnitude"), Pluto can be seen

Pluto's apparent magnitude is approximately 14. According to Figure17.7 in the textbook ("Apparent Magnitude"), Pluto can be seen A) With the naked...

The mass of a star may be determined

The mass of a star may be determined A) By studying its orbit around a binary companion B) By determining its composition C) By measuring its Doppler...

Cool stars can be very luminous if they are very

Cool stars can be very luminous if they are very A) Close to our solar system B) Hot C) Large D) Small Answer: ...

Stars of spectral class M do not show strong lines of hydrogen in their spectra because

Stars of spectral class M do not show strong lines of hydrogen in their spectra because A) Their surfaces are so hot that most hydrogen is ionized B)...

Compared with a star of absolute magnitude -2 at a distance of 100 pc, a star of absolute magnitude 5 at a distance of 10 pc will appear

Compared with a star of absolute magnitude -2 at a distance of 100 pc, a star of absolute magnitude 5 at a distance of 10 pc will appear A) Brighter B)...

According to the inverse-square law, if the distance to a lightbulb increases by a factor of 5, the bulb's apparent brightness

According to the inverse-square law, if the distance to a lightbulb increases by a factor of 5, the bulb's apparent brightness A) Stays the same B)...

From a distance of 1 parsec, the angular size of Earth's orbit would be

From a distance of 1 parsec, the angular size of Earth's orbit would be  A) 2 degrees B) 1 arc minute C) 2 arc seconds D) 1 degree Answer...

In order to turn a star's proper motion into its space velocity, we must also know:

In order to turn a star's proper motion into its space velocity, we must also know: A) Its mass and spectral type B) Its temperature and age C) Its...

At the distance of Jupiter (6 times further away from the Sun than Earth) the amount of sunlight received per square centimeter different by what factor?

At the distance of Jupiter (6 times further away from the Sun than Earth) the amount of sunlight received per square centimeter different by what factor? A)...

Which type of binary star system can have its size measured directly by photometry?

Which type of binary star system can have its size measured directly by photometry? A) Virtual B) Visual C) Eclipsing D) Spectroscopic E) Astrom...

In a visual binary system with circular orbits, if in 20 years the two stars' position angles have shifted by 30 degrees, the pari's period must be:

In a visual binary system with circular orbits, if in 20 years the two stars' position angles have shifted by 30 degrees, the pari's period must be: A)...

Alpha Centauri A and B have an average orbital separation of about 23 AU and a period of about 80 years. Approximately what is the sum of their masses (in solar units)?

Alpha Centauri A and B have an average orbital separation of about 23 AU and a period of about 80 years. Approximately what is the sum of their masses...

The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1; how much brighter does the Sun appear than Sirius?

The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1; how much brighter does the Sun appear than Sirius? A) 25 times B)...

In question 20, how much farther away is it than the other?

In question 20, how much farther away is it than the other? A) 3 times farther B) 4 times farther C) 9 times farther D) 16 times farther E) None of...

Two stars--A, with a luminosity 0.5 times that of the Sun, and B, with a luminosity 4.5 times that of the Sun--are observed to have the same apparent brightness, Which one is more distant?

Two stars--A, with a luminosity 0.5 times that of the Sun, and B, with a luminosity 4.5 times that of the Sun--are observed to have the same apparent...

In the H-R diagram, the bright blue-white stars dominate the naked eye sky lie to the:

In the H-R diagram, the bright blue-white stars dominate the naked eye sky lie to the: A) Top left B) Top right C) Middle of the main sequence D)...

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie:

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie: A) At the top left B) At the top right C) Close to the Sun, near the center D) At...

On the H-R diagram, red supergiants like Betelgeuse lie:

On the H-R diagram, red supergiants like Betelgeuse lie: A) At the bottom left B) At the bottom right C) At the top left D) At the top right E) They...

Which star do you expect to have the shortest lifetime?

Which star do you expect to have the shortest lifetime? A) O stars B) B stars C) G stars D) M stars Answer: ...

In which stars are the visible hydrogen lines strongest?

In which stars are the visible hydrogen lines strongest? A) Blue stars B) White stars C) Yellow stars D) Red stars Answer: ...

If the absolute magnitude M of a star is 1/38 and its apparent magnitude is -1.47, how far is it away?

If the absolute magnitude M of a star is 1/38 and its apparent magnitude is -1.47, how far is it away? A) 17.6 pc B) 34.9 pc C) 5.7 pc D) 2.7 pc E)...

Which changes by the largest factor along the main sequence from spectral types O to M?

Which changes by the largest factor along the main sequence from spectral types O to M? A) Mass B) Luminosity C) Radius Answer: ...

A star that is cool and very luminous must have

A star that is cool and very luminous must have A) A very large radius B) A very small radius C) A very small mass D) A very great distance E) A...

Which of the following stars is hottest?

Which of the following stars is hottest? A) An M star B) An F star C) A G star D) A B star E) An O star Answer: ...

If the radial velocity of a star is +20 km/s and the proper motion of the star is such that the transverse speed is 22 km/s, what is the true space motion of the star?

If the radial velocity of a star is +20 km/s and the proper motion of the star is such that the transverse speed is 22 km/s, what is the true space...

Using the radius-luminosity-temperature relationship, estimate the size of the star Sirius B using the fact that the temperature of Sirius B is 12,000 K and its luminosity is 10(24) W, about 0.002 times the Sun

Using the radius-luminosity-temperature relationship, estimate the size of the star Sirius B using the fact that the temperature of Sirius B is 12,000...

Star A and star B both have an apparent magnitude of 4.0, but star A has an absolute magnitude of 1.0 and star B has an absolute magnitude of 7.0. Which statement below is correct?

Star A and star B both have an apparent magnitude of 4.0, but star A has an absolute magnitude of 1.0 and star B has an absolute magnitude of 7.0. Which...

Of the following telescopes, the one best suited to observing dark dust clouds is

Of the following telescopes, the one best suited to observing dark dust clouds is  a) an orbiting ultraviolet telescope. b) an X-ray telescope. c)...

A nova is a sudden outburst of light coming from an old main-sequence star.

A nova is a sudden outburst of light coming from an old main-sequence star. Answer: False nuclear explosion of a white dwarf causing sudden star...

A planetary nebula is the disk of matter around a star that will eventually form a planetary system.

A planetary nebula is the disk of matter around a star that will eventually form a planetary system. Answer: False planetary nebula is emission...

The formation of the first high-mass stars in a collapsing cloud tend to inhibit further star formation within the cloud.

The formation of the first high-mass stars in a collapsing cloud tend to inhibit further star formation within the cloud. Answer: Tru...

Twenty-one-centimeter radiation can be used to probe the interiors of molecular clouds.

Twenty-one-centimeter radiation can be used to probe the interiors of molecular clouds. Answer: Fals...

Red giants are very bright because they are extremely hot

Red giants are very bright because they are extremely hot Answer: Fals...

Star A appears brighter than star B, as seen from Earth. Therefore star A must be closer to Earth than star B.

Star A appears brighter than star B, as seen from Earth. Therefore star A must be closer to Earth than star B. Answer: Fals...

Neutrinos have never been detected experimentally

Neutrinos have never been detected experimentally Answer: Fals...

Sunspots appear dark because they are hotter than the surrounding gas in the photosphere

Sunspots appear dark because they are hotter than the surrounding gas in the photosphere Answer: Fals...

A white dwarf can explode when

A white dwarf can explode when a) its mass exceeds the Chandrasekhar limit b) its electron degeneracy increases enormously c) fusion reactions increase...

Elements heavier than carbon(hydrogen/helium) were created

Elements heavier than carbon(hydrogen/helium) were created  a) in the Big Bang b) by the nucleosynthesis in a massive star c) in the cores of...

The sun will evolve away from the main sequence when

The sun will evolve away from the main sequence when a) its core begins fusing iron b) its supply of hydrogen c) the carbon core detonates, and it...

A star like our sun will spend most of its "shining" lifetime

A star like our sun will spend most of its "shining" lifetime a) as a protostar b) as a red giant c) as a main sequence star d) as a white dwarf e)...

What is a T-Tauri star?

What is a T-Tauri star? a) a collapsing cloud of gas about to become a protostar b) a dying star c) a cool main sequence star d) a star releasing a...

A white dwarf is supported by the pressure of tightly packed

A white dwarf is supported by the pressure of tightly packed  a) protons b) neutrons c) photons d) electrons Answer: d) Electron...

Most of the carbon in our bodies originated in

Most of the carbon in our bodies originated in  a) a nearby galaxy b) the core of the sun c) the core of a red giant star d) a supernova Answer: c)...

It takes less and less time to fuse heavier and heavier elements inside a high-mass star.

It takes less and less time to fuse heavier and heavier elements inside a high-mass star. Answer: Tru...

Nuclear fusion in the core of a massive star can not create elements much heavier than iron.

Nuclear fusion in the core of a massive star can not create elements much heavier than iron. Answer: Tru...

All of the single red-dwarf stars that ever formed are still on the main sequence today

All of the single red-dwarf stars that ever formed are still on the main sequence today Answer: Tru...

The Sun will get brighter as it begins to run out of fuel in its core.

The Sun will get brighter as it begins to run out of fuel in its core. Answer: Tru...

In a core-collapse supernova, the outer part of the core rebounds from the inner, high-density core, destroying the entire outer part of the star.

In a core-collapse supernova, the outer part of the core rebounds from the inner, high-density core, destroying the entire outer part of the star. ...

A protostar that will eventually turn into a star like the Sun is significantly

A protostar that will eventually turn into a star like the Sun is significantly  a) less massive than the Sun. b) more luminous than the Sun. c)...

The red glow of an emission nebula

The red glow of an emission nebula  a) is a reflection of light from stars near the nebula. b) is the unresolved light of many faint red stars...

More massive stars form more rapidly.

More massive stars form more rapidly. Answer: Tru...

Emission nebulae radiate mainly in the ultraviolet part of the electromagnetic spectrum.

Emission nebulae radiate mainly in the ultraviolet part of the electromagnetic spectrum. Answer: Fals...

Brown dwarfs take a long time to form, but will eventually become visible stars on the lower main sequence.

Brown dwarfs take a long time to form, but will eventually become visible stars on the lower main sequence. Answer: Fals...

Most stars form as members of groups or clusters.

Most stars form as members of groups or clusters. Answer: Tru...

Interstellar matter is quite evenly distributed throughout the Milky Way Galaxy

Interstellar matter is quite evenly distributed throughout the Milky Way Galaxy Answer: Fals...

Compared with a star of absolute magnitude -2 at a distance of 100 pc, a star of absolute magnitude 5 at a distance of 10 pc will appear

Compared with a star of absolute magnitude -2 at a distance of 100 pc, a star of absolute magnitude 5 at a distance of 10 pc will appear  a)...

The mass of a star may be determined

The mass of a star may be determined  a) by studying its orbit around a binary companion. b) by measuring its luminosity. c) by determining...

Cool stars can be very luminous if they are very

Cool stars can be very luminous if they are very a) hot b) small c) close to the solar system d) Large Answer: d) Larg...

Stars of spectral class M do not show strong lines of hydrogen in their spectra because

Stars of spectral class M do not show strong lines of hydrogen in their spectra because a) the hydrogen lines are swamped by even stronger lines...

The radius of a star can be determined if the star's distance and luminosity are known.

The radius of a star can be determined if the star's distance and luminosity are known. Answer: Fals...

In a spectroscopic binary, the orbital motion of the component star appears as variations in the overall apparent brightness of the system.

In a spectroscopic binary, the orbital motion of the component star appears as variations in the overall apparent brightness of the system. Answe...

Astronomers can distinguish between main-sequence and giant stars by purely spectroscopic means

Astronomers can distinguish between main-sequence and giant stars by purely spectroscopic means Answer: Tru...

A star of apparent magnitude +5 looks brighter than one of apparent magnitude +2.

A star of apparent magnitude +5 looks brighter than one of apparent magnitude +2. Answer: Fals...

There are no billion-year-old main-sequence O- or B-type stars.

There are no billion-year-old main-sequence O- or B-type stars. Answer: Tru...

From a distance of 1 parsec, the angular size of Earth's orbit would be

From a distance of 1 parsec, the angular size of Earth's orbit would be a) 2 arc seconds b) 1 degree c) 1 arc minute d) 2 degrees Answer: a)...

The time between successive sunspot maxima is about

The time between successive sunspot maxima is about  a) a decade b) a year c) a month d) a century Answer: a) a decad...

The Sun spins on its axis roughly once each

The Sun spins on its axis roughly once each a) year b) hour c) day d) Month Answer: d) mont...

The density and temperature in the solar corona are much higher than in the photosphere.

The density and temperature in the solar corona are much higher than in the photosphere. Answer: Fals...

The most abundant element in the Sun is hydrogen.

The most abundant element in the Sun is hydrogen. Answer: Tru...

The proton-proton chain releases energy because mass is created in the process.

The proton-proton chain releases energy because mass is created in the process. Answer: False. energy is given off and the new element is li...

Flares are caused by magnetic disturbances in the lower atmosphere of the Sun.

Flares are caused by magnetic disturbances in the lower atmosphere of the Sun. Answer: Tru...

There are as many absorption lines in the solar spectrum as there are elements present in the Sun.

There are as many absorption lines in the solar spectrum as there are elements present in the Sun. Answer: Fals...

Astronomers use the term nebula to refer to

Astronomers use the term nebula to refer to a) outer envelopes of dying stars that drift gently into space. b) remnants of stars that die by supernova. c)...

Two stars have the same surface temperature, but the radius of one is 10 times that of the other. The larger star is

Two stars have the same surface temperature, but the radius of one is 10 times that of the other. The larger star is a) the same luminosity b) twice...

Wien's law tells us that the hotter an object, the _____ the peak wavelength of its emitted light.

Wien's law tells us that the hotter an object, the _____ the peak wavelength of its emitted light. a) longer b) more green c) heavier d) shorter e)...

Which of the following quantities do you need in order to calculate a star's luminosity?

Which of the following quantities do you need in order to calculate a star's luminosity? a) apparent brightness b) Doppler shift of spectral lines c)...

The absolute magnitude of a star is its brightness as seen from a distance of

The absolute magnitude of a star is its brightness as seen from a distance of a) one million km. b) one Astronomical Unit. c) one light-year. d)...

In the stellar magnitude system invented by Hipparchus, a smaller magnitude indicates a _____ star.

In the stellar magnitude system invented by Hipparchus, a smaller magnitude indicates a _____ star. a) brighter b) hotter c) cooler d) fainter e)...

Two identical stars, one 5 ly from Earth, and a second 50 ly from Earth are discovered. How much fainter does the farther star appear to be?

Two identical stars, one 5 ly from Earth, and a second 50 ly from Earth are discovered. How much fainter does the farther star appear to be? a) square...

For two stars of the same apparent brightness, the star closer to the Sun will generally have

For two stars of the same apparent brightness, the star closer to the Sun will generally have a) a higher flux b) a hotter temperature c) a lower...

How far away from Earth is the nearest star?

How far away from Earth is the nearest star? a) 1.3 pc b) 1 AU c) 0.53" d) 10 ly e) 10 pc Answer: b) 1 A...

If the parallax of a star is measured to be 0.1 seconds of arc, its distance is

If the parallax of a star is measured to be 0.1 seconds of arc, its distance is a) 10 astronomical units b) 10 parsecs c) 1 parsec d) 0.1 parsec e)...

How many radians in 60 degrees?

How many radians in 60 degrees? a) 3.14159 b) π/6 c) π/3 d) 2π/60 Answer: c) π/...

Solar energy is produced by

Solar energy is produced by a) the release of heat leftover from the Sun's formation. b) solar magnetism. c) fission of heavier nuclei into lighter...

The proton-proton cycle involves what kind of fusion process?

The proton-proton cycle involves what kind of fusion process? a) carbon (C) into oxygen (O) b) helium (He) into carbon (C) c) hydrogen (H) into helium...

What is probably responsible for the increase in temperature of the corona far from the Sun's surface?

What is probably responsible for the increase in temperature of the corona far from the Sun's surface? a) the higher rate of fusion b) the Sun's magnetism c)...

Sunspots appear dark because they are

Sunspots appear dark because they are a) holes in the photosphere through which you can see deeply into the solar interior. b) a bit cooler, thus...

The photosphere (the visible surface) of the Sun is like

The photosphere (the visible surface) of the Sun is like a) the surface of Earth; you could stand on it, if you could survive the heat. b) the surface...

The light from the East limb (edge) of the Sun is blue shifted and the light from the West limb is redshifted. This is because

The light from the East limb (edge) of the Sun is blue shifted and the light from the West limb is redshifted. This is because a) different kinds...

Tremendous pressure is created at the Sun's center due to its own gravity. The Sun is kept from collapsing by

Tremendous pressure is created at the Sun's center due to its own gravity. The Sun is kept from collapsing by a) neutrinos and other particles generated...

The density of the Sun is most similar to that of

The density of the Sun is most similar to that of a) a comet. b) Jupiter. c) Earth. d) interstellar gas. e) an asteroid. Answer: B) Jupiter The...

Molecular hydrogen- found in cold dark dust clouds that may form the beginning of stars. How much bigger is the Sun's radius compared to Earth's radius?

Molecular hydrogen- found in cold dark dust clouds that may form the beginning of stars. How much bigger is the Sun's radius compared to Earth's radius? a)...

Star formation happens when part of a dust cloud begins to contract under its own gravitational force stars are formed from cold interstellar gas clouds made up of

Star formation happens when part of a dust cloud begins to contract under its own gravitational force stars are formed from cold interstellar gas clouds...

If an Interstellar cloud contracts to become a star, it is due to which force?

If an Interstellar cloud contracts to become a star, it is due to which force? a) electromagnetic b) nuclear strong c) Nuclear Weak d) gravitational e)...

The reddish color of emission nebulae indicates that

The reddish color of emission nebulae indicates that  A) gas and dust is moving away from the earth B) hydrogen gas is present C) dying stars...

Some regions of the milky way's disk appear dark because

Some regions of the milky way's disk appear dark because a) there are no stars here b) stars in that direction are obscured by interstellar gas c)...

Interstellar gas is composed primarily of

Interstellar gas is composed primarily of a) 90% hydrogen, 9% helium, and 1% Heavier gas b) molecules including water and CO2. c) 50% hydrogen, 50%...

Which spectral classification and type corresponds to a star like the Sun?

Which spectral classification and type corresponds to a star like the Sun? a) B8IA b) GIII c)M5V d) G2V e) K2V Answer: d) G2...