5 Questions
What is the approximate diameter of the Milky Way Galaxy?
80,000 light-years
Which of the following is the largest in distance?
1 light year
On the Cosmic Calendar, when did the solar system begin to form?
September 1
What is an Astronomical Unit (AU)?
The average distance between the Sun and the Earth
Which of these objects is furthest from the Sun?
A comet in the Oort cloud
Test your knowledge of astronomy with this quiz covering topics such as the size of galaxies, formation of the solar system, and the use of light years in astronomical measurements.
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