Six astronomical variables are given on each of the historical nine planets (or eight planets, plus Pluto).
planetsA double matrix with 9 observations on the following 6 variables.
Average distance in millions of miles the planet is from the sun.
The length of the planet's day in Earth days
The length of year in Earth days
The planet's diameter in miles
The planet's temperature in degrees Fahrenheit
Number of moons
John W. Wright, editor. The Universal Almanac. Andrews McMeel Publishing, Kansas City, MO, 1997.