Astronomical Units and Light Years

Question 1

Name five planets that were discovered by observing the sky with the naked eye.

Answer 1

Mercury, Venus, Mars, Jupiter, Saturn,

Question 2

Units / Symbol / Corresponding distance / Equivilant distance in kilometers

Answer 2

Astronomical unit / AU / Average distance between the Earth and the Sun / 150 million km

Light year / ly / Distance light travels in one year / 9 500 billion km

Question 3

1 AU =

Answer 3

150 million km

150 000 000 km

Question 4

1 LY =

Answer 4

9 460 billion km

9 460 000 000 000 km