What does Hubble use to turn itself and point at a target?
Hubble doesn't have any thrusters on board to
be able to propel us in any way shape or form.
What we can do is we can turn our attitude and what we do is we have
reaction wheels that are about two feet wide, we've got four of them,
if you spin a reaction wheel in one way the telescope will rotate
in the opposite way.
We're moving all over the sky looking at different places
typically we will go to a target and stay there for
probably two orbits each orbit being about 95 to 97 minutes.
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