comparing a planet to others to better understand its features. that different parts of the planet have different composi- tions. that different planets have different compositions. calculating the slope of the trajectory.
comparing a planet to others to better understand its features. that different parts of the planet have different composi- tions.that different planets have different compositions. calculating the slope of the trajectory.
Comparing a planet to others to better understand its features. that different parts of the planet have different composi -. Tions. that different planets have different compositions. calculating the slope of the trajectory.