1) How old is the universe? a) 14.8 billion years. b) 13.8 billion years. c) 13.7 billion years. d) 11.6 billion years. e) 13.9 billion years. f) 15.6 billion years. 2) What is the diameter of the Milky Way? a) 105,700 light years. b) 100,000 light years. c) 75,000 light years. d) 98,450 light years. e) 104,000 light years. f) None of the above. 3) When was Pluto stripped of its title as a planet? a) 2003 b) 2004 c) 2007 d) 2010 e) 2006 f) 2008 4) Can gravity form waves? a) True. b) False. 5) Can a black hole give off light? a) True b) False 6) What is the needed size for a star to become a black hole? a) Less than 8 solar masses.  b) More than 8 solar masses.  c) More than 9 solar masses. 7) What is the densest thing in the universe? a) Neutron star. b) Black hole. 8) When is the Sun going to die?  a) 8.2 billion years.  b) 5.8 billion years.  c) 7.2 billion years.  d) 4.5 billion years.

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