Sunday, April 24, 2011

Trajectories & velocities

If today was the launch, I guess that means we are in orbit now. It is an uneasy excitement as we become accustomed to the weightlessness of our journey into the unknown. In the distant past I was a science fiction nerd. I read a lot of books and watched quite a few cheesy science fiction movies. During that time I also became very interested in the early space program. I spent hours reading books on the Mercury, Gemini, and Apollo programs. The latter of which placed a man on the moon in the summer of 1969. There were endless pivotal moments in those flights but one of the most important was a period known as TLI. TLI stands for trans-lunar injection. That is where the third stage engine is re-fired, and the spacecraft is accelerated from out of orbit, into a trajectory with the moon (or whatever the preferred destination). Once this burn took place, there was no going back until the astronauts could use the gravity of the moon to assist their trajectory home (told you I was a nerd). Buckle up.

The Lord will fulfill His pupose for me; Your steadfast love, O Lord, endures forever. Do not forsake the work of Your hands- Psalm 138:8