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the concept of a star tracker probably

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can be traced back to the early sailors

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who used to navigate the open sea the

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concept is they use starfield patterns

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in order to tell them where their

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appointed while they're selling from

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east of west or north or south whichever

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direction are going the Star Trek is a

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lot more complicated and that it uses

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the entire star field pattern to to

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provide attitude knowledge or in the

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layman's term of more of the direction

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in which the spacecraft is pointing

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while is orbiting the earth or doing

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whatever its science mission requires it

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to do so essentially it's an optical

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device to access the eyes of the

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spacecraft the star tracker is built for

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the Lunar Reconnaissance Orbiter and the

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Solar Dynamics Observatory both NASA

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missions were built in Florence Italy by

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Galileo avionic they write their own

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software used to operate the star

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trackers around all of their optics

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fabricate the structures and assemble in

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testa electronics once the star trackers

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are assembled Galileo a Bionicle works

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with NASA engineers in order to ensure

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that the star trackers are built to

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achieve their performance requirement as

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well as their environmental requirements

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the LRO and stl missions both use two

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star trackers for redundancy so that if

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you get a failure in one the second star

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tracker will be used as the backup also

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the use of two star trackers provided at

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it or increase performance accuracy so

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that the spacecraft will have a more

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accurate knowledge of where it's pointed

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while its orbit either the moon

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the earth order something

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NASA is an educational extension of the

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government through all the information

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we get from all our various missions we

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learn things about our earth space how

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space affects earth are changing

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environment all of these things are

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important to everyone in the world

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whether we know it or not and the

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importance of star trackers is they act

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as the eyes of the satellite to let the