cylindrical projectile that can be propelled to great height or distance by combustion of its contents. Powerful engines that releases hot gases. increase very rapidly.

At first; in the beginning.

Mathematical statement showing things to be equal.

Doing your job. action of doing work. To operate a machine or device.

To start doing again after a break, pause, or stop.

person who is trained to travel in spacecraft.

Grown bigger, older and more mature. To explain something in steps and in detail.

used for emphasis with following adjective functioning as adverb. Thing that is not yet known or named.

move in orbit round.

providing or showing creative or spiritual inspiration.

gladly received. used to greet someone in polite or friendly way. Friendly greeting to someone who has arrived. To greet someone who has just arrived.

Being peaceful or well managed. Organized in a way that makes sense or is neat. Kind of soldier who helps an army officer.

person visiting someone or somewhere.

relating to orbit or orbits. each of actual or potential patterns of electron density that may be formed in atom or molecule by one or more electrons.

act of launching. Acts of firing rockets into the air. To put a ship into the water for the first time.