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What does Hubble use to turn itself and point at a target?

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Hubble
doesn't have any thrusters on board to

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be able to propel us in any way shape or
form.

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What we can do is we can turn our
attitude and what we do is we have

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reaction wheels that are about two feet
wide, we've got four of them,

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if you spin a reaction wheel in one way
the telescope will rotate

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in the opposite way.

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We're moving all over the sky looking at
different places

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typically we will go to a target and
stay there for

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probably two orbits each orbit being
about 95 to 97 minutes.

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