The Hohmann Transfer?

[Vespasianus]

So, I'm not sure if this is the right place to post this, but I'll give it a go

So, I've read a lot about the so-called hohmann transfer, but I never really understood how it works. Since Wikipedia didn't really solve it either, I'm turning to you guys, in the hope that someone could explain it in a simple manner.

Could anyone help me?

Cheers!

[SiliconPyro]

Basically, if you are in an orbit of a given altitude and want to change to an orbit of a different altitude, change your speed. Going faster by doing a direct burn will increase your apoapsis. When it reaches your destination altitude, stop burning. When you reach apoapsis (just before actually) burn direct again to bring your periapsis up to circularize.

Conversely, you can burn retrograde to decrease your Periapsis to a lower target orbit, then when you reach periapsis, burn retrograde again to bring your apoapsis down to circularize.