Question 1

Which has a smaller radius,a 2M⨀ neutron star or a 3M⨀ neutron star? What supports each of these stars from collapsing to form a black hole?

Accepted Answer

The pressure from degenerate neutrons su

Question 2

Type I and Type II supernovae are approximately equal in luminosity.

Accepted Answer

A) True 
 B)False

Question 3

Suppose you measured H-R diagrams for the two star clusters pictured below.Which cluster is older? Which cluster is farther away? Explain why.

Accepted Answer

The spectral type of Cluster A's main-se

Question 4

Iron has 26 protons in its nucleus,and gold has 79 protons.Where did all the gold on the Earth come from?

Accepted Answer

A) nucleosynthesis on the surfaces of neutron stars 
B) nucleosynthesis that took place in supernova explosions 
C) nucleosynthesis in the cores of low-mass stars 
D) nucleosynthesis in the cores of massive stars 
E) nucleosynthesis in red giant and horizontal-branch stars 
A) nucleosynthesis on the surfaces of neutron stars 
B) nucleosynthesis that took place in supernova explosions 
C) nucleosynthesis in the cores of low-mass stars 
D) nucleosynthesis in the cores of massive stars 
E) nucleosynthesis in red giant and horizontal-branch stars

Question 5

Which of these begins first in the core of a massive star?

Accepted Answer

A) silicon fusion to iron 
B) neon fusion to magnesium 
C) carbon fusion to neon 
D) helium fusion to carbon 
E) hydrogen fusion to helium 
A) silicon fusion to iron 
B) neon fusion to magnesium 
C) carbon fusion to neon 
D) helium fusion to carbon 
E) hydrogen fusion to helium

Question 6

Most of the uranium (atomic mass 238)found on the Earth was formed in Type II supernova explosions.

Accepted Answer

A) True 
 B)False

Question 7

Explain why the pulsars we see might only be a fraction of the neutron stars in the Milky Way.

Accepted Answer

Pulsars are neutron stars that are emitt

Question 8

Suppose the Milky Way makes 10 new stars per year and only 1 out of 5,000 will explode as a supernova.What would be the average time between supernova explosions in the Milky Way?

Accepted Answer

A) 50 years 
B) 500 years 
C) 5,000 years 
D) 50,000 years 
E) 500,000 years 
A) 50 years 
B) 500 years 
C) 5,000 years 
D) 50,000 years 
E) 500,000 years

Which has a smaller radius,a 2M_⨀ neutron star or a 3M_⨀ neutron star? What supports each of these stars from collapsing to form a black hole?

Type I and Type II supernovae are approximately equal in luminosity.

Suppose you measured H-R diagrams for the two star clusters pictured below.Which cluster is older? Which cluster is farther away? Explain why.

Iron has 26 protons in its nucleus,and gold has 79 protons.Where did all the gold on the Earth come from?

Which of these begins first in the core of a massive star?

Most of the uranium (atomic mass 238)found on the Earth was formed in Type II supernova explosions.

Explain why the pulsars we see might only be a fraction of the neutron stars in the Milky Way.

Suppose the Milky Way makes 10 new stars per year and only 1 out of 5,000 will explode as a supernova.What would be the average time between supernova explosions in the Milky Way?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Exam 17: Evolution of High-Mass Stars

Which has a smaller radius,a 2M⨀ neutron star or a 3M⨀ neutron star? What supports each of these stars from collapsing to form a black hole?

Type I and Type II supernovae are approximately equal in luminosity.

Suppose you measured H-R diagrams for the two star clusters pictured below.Which cluster is older? Which cluster is farther away? Explain why.

Iron has 26 protons in its nucleus,and gold has 79 protons.Where did all the gold on the Earth come from?

Which of these begins first in the core of a massive star?

Most of the uranium (atomic mass 238)found on the Earth was formed in Type II supernova explosions.

Explain why the pulsars we see might only be a fraction of the neutron stars in the Milky Way.

Suppose the Milky Way makes 10 new stars per year and only 1 out of 5,000 will explode as a supernova.What would be the average time between supernova explosions in the Milky Way?

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Which has a smaller radius,a 2M_⨀ neutron star or a 3M_⨀ neutron star? What supports each of these stars from collapsing to form a black hole?