AST 104 Midterm: AST104 Exam Practice B

Place each statement in the correct bin corresponding to whether it represents 1 astronomical unit (1 AU), 1 light-year, or neither of those.

Please see the attached image.

Some jovian planets give off more energy than they receive because of

1. fusion is taking place in their cores.
2. tidal heating is occurring.
3. they are still slowly contracting after formation.

Which of the following statements does not use the term light-year in an appropriate way?
A) A light-year is about 10 trillion kilometers.
B) It's about 4 light-years from here to Alpha Centauri.
C) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
D) The Milky Way Galaxy is about 100,000 light-years in diameter.
E) It will take me light-years to complete this homework assignment.