Thanks for your dream and for the background information.
I have been studying Michael Sheridan's dream analysis method for a few years now, so here's my take on your dream...
The theme of this dream is that a spiritual aspect of your life (travelling into the 'heavens') is taking off. You are flying the rocket, so it's down to the work you are doing on yourself that this positive change is happening.
You successfully docked the rocket with the ship. A spaceship often represents your guides or guardian angels. As Michael says in his dream dictionary, "Even if you believe in them, if the concept is any way strange or feels alien to you, they can show up in your dreams like this. The dream is asking you to let them make contact."
So that's REALLY good. The work you are doing is bringing you into a closer connection with your guides.
The moon lights up the night. Any reference to sources of light that dispel darkness symbolise the gift of intuition, which the dream indicates you have. Do you find yourself 'just knowing' about something without any apparent reason? As you are going to the moon, the dream is asking you to develop this ability further, which is actually a connection with your Higher Self and works through the heart chakra.
"I remember the sensation of being extremely cold, but also that it wasn't bothering me."
As well as providing guidance, dreams also try to heal us. This 'cold' symbol is suggesting that you might have 'shut down' (i.e. cooled) your feelings and emotions, which would be totally understandable bearing in mind your traumatic past. It's something we all do when we live through traumatic times and is a natural protection mechanism. However, the dream is asking you to start the opening up process, allowing yourself to feel the emotions and feelings of others, as well as expressing your own feelings. Does this resonate at all?
I hope this might help and well done for your positive actions and attitude in moving forwards - all in all, a fantastic dream!
P.S. It's also likely that you have other spiritual gifts due to the rocket being a powerful vehicle, the fact that you are piloting it, and flying through the air... other dreams may confirm these.