Orbital mechanics or astrodynamics is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft. The motion of these objects is usually calculated from Newton's laws of motion and Newton's law of universal gravitation.
You are invited to land your spacecraft at the posted coordinates during the hours of 8pm - 9pm. During this time, all life forms will be partaking in geochatter and possibly even some treats. Purchase is not necessary to attend.
The year is 2650. You are invited to join the Geocaching Explorers Club and be among the first geocachers to visit every planet in our solar system earning souvenirs along the way. Find different cache types to collect points individually on the Friend League between March 19 and April 8 and earn up to nine planet souvenirs to become an Official Space Explorer. The Friend League will reset to zero on Monday, April 9 at noon UTC.