Question 1

Emission nebulae occur only near stars that emit large amounts of electromagnetic radiation.

Accepted Answer

A)  infrared 
B)  X- ray 
C)  radio 
D)  visible light 
E)  ultraviolet 
A)  infrared 
B)  X- ray 
C)  radio 
D)  visible light 
E)  ultraviolet

Question 2

In its _ stage, the new protostar's solar winds will form bi- polar jets as the star's magnetic field intensifies.

Accepted Answer

The answer of In its _ stage, the new protostar's...

Question 3

In stage 3 of star formation, the cloud has collapsed enough that its inner regions are opaque to their own radiation.

Accepted Answer

A) True 
 B)False

Question 4

The dust particles have exactly the same chemical composition as the gases of the interstellar medium.

Accepted Answer

A) True 
 B)False

Question 5

Relate Herbig- Haro objects to the T- Tauri Wind.

Accepted Answer

In stage 5, the spinning protostar forms

Question 6

A protostar of one- half solar mass would reach the main sequence in time than it took our own Sun.

Accepted Answer

The answer of A protostar of one- half solar mass...

Question 7

Complex molecules in the interstellar medium are found

Accepted Answer

A)  only around the supergiant stars like Betelgeuse that make their heavy atoms. 
B)  on the surfaces of the coolest class K and M stars only. 
C)  uniformly throughout the disk of the Galaxy. 
D)  scattered evenly throughout the universe, a product of the Big Bang itself. 
E)  primarily in the dense dust clouds. 
A)  only around the supergiant stars like Betelgeuse that make their heavy atoms. 
B)  on the surfaces of the coolest class K and M stars only. 
C)  uniformly throughout the disk of the Galaxy. 
D)  scattered evenly throughout the universe, a product of the Big Bang itself. 
E)  primarily in the dense dust clouds.

Question 8

The Pleiades (or Seven Sisters) an example of a(n) .

Accepted Answer

The answer of The Pleiades (or Seven Sisters) an example...

Question 9

Conditions inside the darkest, densest nebulae are best studied with radio emission from molecules.

Accepted Answer

A) True 
 B)False

Question 10

Neutral hydrogen atoms are best studied from their energy given off as

Accepted Answer

A)  121.3 nm as Lyman alpha emission in the UV. 
B)  red hydrogen alpha emission, at 656.3 nm. 
C)  0.2 nm as X- rays. 
D)  21- cm waves in the radio region. 
E)  Neutral hydrogen gives off no detectable radiation, since it is cold, not hot. 
A)  121.3 nm as Lyman alpha emission in the UV. 
B)  red hydrogen alpha emission, at 656.3 nm. 
C)  0.2 nm as X- rays. 
D)  21- cm waves in the radio region. 
E)  Neutral hydrogen gives off no detectable radiation, since it is cold, not hot.

Question 11

Which is characteristic of globular star clusters?

Accepted Answer

A)  a mix of old and young stars, about 100,000 ly across 
B)  only brown dwarfs in a yellow ball 100 ly across 
C)  bright blue main sequence stars, and thousands of them 
D)  no remaining main sequence stars, but millions of white dwarfs 
E)  old age and hundreds of thousands of stars, only about 30 ly wide 
A)  a mix of old and young stars, about 100,000 ly across 
B)  only brown dwarfs in a yellow ball 100 ly across 
C)  bright blue main sequence stars, and thousands of them 
D)  no remaining main sequence stars, but millions of white dwarfs 
E)  old age and hundreds of thousands of stars, only about 30 ly wide

Question 12

A star cluster with a lot of hot, blue stars must be relatively young.

Accepted Answer

A) True 
 B)False

Question 13

Why is M- 42, the Orion Nebula, so important to us?

Accepted Answer

It is the closest and brightest region o

Question 14

At what core temperature does hydrogen begin to fuse to helium?

Accepted Answer

A)  3,000 K 
B)  5,800 K 
C)  1 million K 
D)  10 million K 
E)  100 million K 
A)  3,000 K 
B)  5,800 K 
C)  1 million K 
D)  10 million K 
E)  100 million K

Question 15

Which of these would typically be among the brightest stars in an ancient globular cluster?

Accepted Answer

A)  M5 
B)  B3 
C)  A4 
D)  O3 
E)  K3 
A)  M5 
B)  B3 
C)  A4 
D)  O3 
E)  K3

Question 16

The interstellar gas in our portion of the Galaxy is about K in temperature.

Accepted Answer

A)  10 
B)  100 
C)  1,000 
D)  10,000 
E)  100,000 
A)  10 
B)  100 
C)  1,000 
D)  10,000 
E)  100,000

Question 17

Due to absorption of shorter wavelengths by interstellar dust clouds, distant stars appear

Accepted Answer

A)  redder. 
B)  brighter. 
C)  bluer. 
D)  larger. 
E)  to have a higher radial velocity. 
A)  redder. 
B)  brighter. 
C)  bluer. 
D)  larger. 
E)  to have a higher radial velocity.

Question 18

Why are emission nebulae ideal places to go hunting for brown dwarfs?

Accepted Answer

These stellar nurseries give birth to a

Question 19

The most common molecule in a molecular cloud is

Accepted Answer

A)  methane, CH4. 
B)  ammonia, NH3. 
C)  water, H2O. 
D)  molecular hydrogen, H2. 
E)  carbon monoxide, CO. 
A)  methane, CH4. 
B)  ammonia, NH3. 
C)  water, H2O. 
D)  molecular hydrogen, H2. 
E)  carbon monoxide, CO.

Question 20

Interstellar reddening and extinction are due to in the interstellar medium.

Accepted Answer

A)  ice crystals 
B)  dust 
C)  helium gas 
D)  hydrogen gas 
E)  rogue planets 
A)  ice crystals 
B)  dust 
C)  helium gas 
D)  hydrogen gas 
E)  rogue planets

Emission nebulae occur only near stars that emit large amounts of electromagnetic radiation.

In its _ stage, the new protostar's solar winds will form bi- polar jets as the star's magnetic field intensifies.

In stage 3 of star formation, the cloud has collapsed enough that its inner regions are opaque to their own radiation.

The dust particles have exactly the same chemical composition as the gases of the interstellar medium.

Relate Herbig- Haro objects to the T- Tauri Wind.

A protostar of one- half solar mass would reach the main sequence in time than it took our own Sun.

Complex molecules in the interstellar medium are found

The Pleiades (or Seven Sisters) an example of a(n) .

Conditions inside the darkest, densest nebulae are best studied with radio emission from molecules.

Neutral hydrogen atoms are best studied from their energy given off as

Which is characteristic of globular star clusters?

A star cluster with a lot of hot, blue stars must be relatively young.

Why is M- 42, the Orion Nebula, so important to us?

At what core temperature does hydrogen begin to fuse to helium?

Which of these would typically be among the brightest stars in an ancient globular cluster?

The interstellar gas in our portion of the Galaxy is about K in temperature.

Due to absorption of shorter wavelengths by interstellar dust clouds, distant stars appear

Why are emission nebulae ideal places to go hunting for brown dwarfs?

The most common molecule in a molecular cloud is

Interstellar reddening and extinction are due to in the interstellar medium.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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Exam 12: The Interstellar Medium: Star Formation in the Milky Way

Emission nebulae occur only near stars that emit large amounts of electromagnetic radiation.

In its _ stage, the new protostar's solar winds will form bi- polar jets as the star's magnetic field intensifies.

In stage 3 of star formation, the cloud has collapsed enough that its inner regions are opaque to their own radiation.

The dust particles have exactly the same chemical composition as the gases of the interstellar medium.

Relate Herbig- Haro objects to the T- Tauri Wind.

A protostar of one- half solar mass would reach the main sequence in time than it took our own Sun.

Complex molecules in the interstellar medium are found

The Pleiades (or Seven Sisters) an example of a(n) .

Conditions inside the darkest, densest nebulae are best studied with radio emission from molecules.

Neutral hydrogen atoms are best studied from their energy given off as

Which is characteristic of globular star clusters?

A star cluster with a lot of hot, blue stars must be relatively young.

Why is M- 42, the Orion Nebula, so important to us?

At what core temperature does hydrogen begin to fuse to helium?

Which of these would typically be among the brightest stars in an ancient globular cluster?

The interstellar gas in our portion of the Galaxy is about K in temperature.

Due to absorption of shorter wavelengths by interstellar dust clouds, distant stars appear

Why are emission nebulae ideal places to go hunting for brown dwarfs?

The most common molecule in a molecular cloud is

Interstellar reddening and extinction are due to in the interstellar medium.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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