So far you have discovered the same phenomena about planetary orbits that Kepler did in his first and second laws of planetary motion. Kepler went on to look at the time it takes for a planet to complete one orbit (period) and the average distance from the sun (a). Procedure Make a table like this one: Orbital Data for Mercury, Mars, and Saturn Values Mercury p (years) Mercury a (AU) Mars p (years) Mars a (AU) Saturn p (years) Saturn a (AU) Value Click here to enter text. Click here to enter text. 1.88 1.52 29.46 9.54 Value squared Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Value cubed Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Click here to enter text. Look at the graph of Mercury's orbit or the data table and write down the time it takes Mercury to complete one orbit (period, p) in days. Convert p from days to years by dividing the number of days by 365 days/year and write the value in the appropriate space in the table. Square the value of p and write it in the appropriate space in the table. Cube the value of p and write it in the appropriate space in the table. Write the value of a from Part 2 in the appropriate space in the table