Question
Which statement about the Milky Way is correct?
A It is a galaxy.
B It is a group of galaxies.
C It is a group of stars outside our own galaxy.
D It is a group of stars which are part of our galaxy.
▶️Answer/Explanation
Ans: A
Question
Which description of a galaxy is correct?
A a collection of billions of stars
B a collection of gaseous planets orbiting a star
C a collection of rocky planets orbiting a star
D all of the stars that exist
▶️Answer/Explanation
Ans: A
Question
An astronomer observes redshift in the light from a distant galaxy.
Which statement about redshift is correct?
A It is the decrease in the observed wavelength of red light emitted from receding galaxies.
B It is evidence that the Universe is contracting and supports the Big Bang Theory.
C It is evidence that the Universe is expanding and supports the Big Bang Theory.
D Redshift is when light from receding galaxies appears blue.
▶️Answer/Explanation
Ans:C