Answer:
it resembles volleyball because its "played as a variation of volleyball
Explanation:
Catchball — a easier version of volleyball in which the players catch and throw the ball rather than hit it. Volleyball — a game for two teams of six players, in which a large ball is hit by hand over a high net, the aim being to score points by making the ball reach the ground on the opponent's side of the court.
Many fundamental laws of physics and chemistry can be formulated when doing this.
The transit method requires watching the light output of a star over long periods of time. A transit occurs when the planet crosses in front of its star from earths point of view. Since there is a small object (the planet) now blocking some of the star, it appears to dim a little bit for a while until the planet passes. If we are in a position where that occurs regularly (most paths of planets do not happen to be on the line of sight between earth and their star) we can deduce the period of orbit. From the amount of dimming and the period you can estimate the mass