This question asks students to calculate various distances to various objects based on various units of measure (solar radii, astronomical units, galactic radii), as well as to use the number of stars in the galaxy as a basis to estimate the number of stars in the universe, in order that the student becomes familiar with basic mathematics using scientific notation.

keywords: *scientific notation, calculate, math, solar radii, astronomical units, galactic radii*

swf file: ca_intro_calcscientnot.swf