Question 1

What is the current composition of the Sun's core?

Accepted Answer

A)  100 percent hydrogen 
B)  65 percent hydrogen; 35 percent helium 
C)  50 percent hydrogen; 50 percent helium 
D)  35 percent hydrogen; 65 percent helium 
A)  100 percent hydrogen 
B)  65 percent hydrogen; 35 percent helium 
C)  50 percent hydrogen; 50 percent helium 
D)  35 percent hydrogen; 65 percent helium

Question 2

Which figure below represents the oldest star cluster?

Accepted Answer

A)  Figure A 
B)  Figure B 
C)  Figure C 
D)  Figure D 
A)  Figure A 
B)  Figure B 
C)  Figure C 
D)  Figure D

Question 3

Label the various regions of an asymptotic giant branch star in the figure below.

Accepted Answer

From the inside out: nonburnin

Question 4

Why does helium burning in the core of a giant star not cause the star to become more luminous?

Accepted Answer

The nuclear reaction rate in t

What is the current composition of the Sun's core?

Which figure below represents the oldest star cluster?

Label the various regions of an asymptotic giant branch star in the figure below.

Why does helium burning in the core of a giant star not cause the star to become more luminous?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters

Exam 12: Evolution of Low-Mass Stars

What is the current composition of the Sun's core?

Which figure below represents the oldest star cluster?

Label the various regions of an asymptotic giant branch star in the figure below.

Why does helium burning in the core of a giant star not cause the star to become more luminous?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters