Thrusters use conservation of momentum.
Ignited fuel creates expanding gas which exits the engines in one direction
and the observatory moves in the opposite direction.
So right now we're looking at the propulsion system for the Roman
Space Telescope.
Today we put our last tank on the propulsion support frame.
The propulsion support frame is the framethat's supporting everything.
The thrusters are so efficient in the vacuum of space
that they can be surprisingly small to move
the 18,000 lbs spacecraft.
This is all it needs.
music.