How Do Rockets Work And How Do A Rocket Is Launch into Space?

I think, among you almost everyone had seen a launching of a rocket once. But do know how a rocket is launch into space? What it requires to get out off earth's atmosphere? I think this is little bit bigger, but it's much amazing. So, read it till the end. 

Let's know, 

The satellite and spacecraft are launched into space by putting them on rocket carrying tons of propellants. The energy required for a rocket to boost away from earth's surface is given by the propellants. If the spacecraft is larger and heavier then the biggest rockets and most propellants are required.

The lift off of a rocket is based on the Newton's third law, which states for every action, there is an equal and opposite reaction. This is the most important idea behind the working of the rocket. 

If you see the pics or videos of a launch, you'll see the exhaust steaming out the bottom of the rocket. This is nothing but the flame, hot gases and smoke coming from the rocket's propellants. As the exhaust is pushed downward from the rockets's engine, it's an action force. As a result, the rocket moves in the opposite direction from the ground, which is a reaction force. 

Once it is launched, it will not keep going. Earth's gravity is still pulling it down. When a rocket burns propellants and pushes out exhaust, it creates a upward force called as thrust. To launch, the thrust pushing the rocket up should be greater than the force of gravity pulling it down. In other words, it need to counter earth's escape velocity. 

A rocket needs to speed up to atleast 17,800 miles per hour, somewhat about 28646 km/h and must fly above most of the atmosphere, in a curved path around the earth. This ensures that it won't be pulled back to the Earth. After this, the things are different, it depends on where you want to go. 

If you are trying to get to another planet, you need to take many in consider. Example, Mars and earth are at the closest distance to each other about every 2 years. This is the best time to plan your Mars trip, since it requires less amount of propellant and time to get there. But you still need to launch your rocket at right time to ensure that the rocket and spacecraft arrive at the same place and at same time. 

If you want want to travel to outer solar system. For instance, it you're sending a spacecraft to Saturn, you need to plan your travel carefully and also you need to encounter Mars and Jupiter on the way there. 

Astronomy is such a thing that, the deeper you gets into it, the more you amazing things you will find and off-course the more knowledge you will get (it's like a black hole). 

Comment your questions which you want to be answered.