Universe

The following picture is the Horsehead Nebula and is located about 1,500 light years from Earth in the constellation Orion. What is most likely occurring in the Horsehead Nebula? 

• new star formation 
• formation of black holes 
• star explosions like supernovas 
• the birth of new galaxies 

The stars we see at night are: 

• in the Milky Way galaxy
  
• in the solar system
  
• in galaxies other than the Milky Way 
• both A and C 

Use this model of the Hertzsprung-Russell diagram to answer question. 
An astronomer discovers a new star that is very hot, but not very bright. What type of star did she discover? 

• a red giant
  
• a young star on the main sequence 
• an old star on the main sequence 
• a white dwarf 

 Our Sun is a middle-aged star with an average temperature and brightness. What type of star is our Sun according to the Hertzburg-Russell diagram? 

• a white dwarf
  
• a red giant
  
• a star on the upper left portion on the main sequence 
• a star in the middle of the main sequence 

As a normal, averaged-size star progresses through its life cycle, what change will it undergo? 

• it becomes cooler
  
• it gets smaller
  
• it becomes brighter 
• its gravity increases 

Which of the following galaxies is most like our own Milky Way? 

• A
• B
• C
• D

Looking at the answer choices in Question#8, which answer choice could best be classified as an asymmetrical galaxy? 

• Galaxy A
• Galaxy B
• Galaxy C
• Galaxy D

 Pulsars are dense, rotating stars that emit strong electromagnetic radiation with a wavelength around 6 mm. Using the chart below, what type of telescope would be best suited for observing pulsars? 

• radio telescopes 
• infrared telescopes 
• optical telescopes 
• ultraviolet telescopes 

You hear an astronomer on television mention that an object in space is about 10 light-years away from planet Earth. This object is located: 

• in the solar system
  
• nearby in the Milky Way galaxy
  
• on the other side of the Milky Way galaxy 
• in another galaxy 

The universe has many different components. Which list places 4 components in the most likely order from smallest to largest?

• Planets, stars, galaxies, nebulae
• Nebulae, stars, planets, galaxies
• Galaxies, stars, planets, nebulae
• Planets, stars, nebulae, galaxies