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[Music]

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the trojan asteroids are small bodies in

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our solar system they share it in orbit

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with jupiter there's two swarms of them

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one located 60 degrees ahead of jupiter

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in its orbit and the other swarm is

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located 60 degrees behind jupiter in its

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orbit and these trojan asteroids are

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remnants from planetary formation so

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sometimes we'll call them the fossils of

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solar system formation their near

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neighbors might have gone into forming

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the giant planets and so these objects

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then became captured in their locations

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today and so in that way we can look and

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see what went into forming the planets

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in our solar system the main goal of the

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lucy mission is to explore the trojan

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asteroids we want to understand where

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these asteroids came from and why

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they're so diverse this is going to be

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our first ever exploration of these

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objects from the earth

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we can see certain features on the

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trojan asteroids we can see where

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they're located we can see their colors

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and we can get spectra

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spectra can tell you about the surface

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composition a spectrum is when you take

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light and spread it out into all its

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different wavelengths and so you have

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the brightness of the light as a

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function of wavelength so think of it

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like a rainbow but you're going to

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divide up the colors even more finely

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than just roy g biv from earth the

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trojan asteroids are just a point of

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light and you can't

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tell one part of the trojan asteroid

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composition versus another part and lucy

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is going to be able to get that detail

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close up but we'll be able to do that by

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taking this spacecraft and these

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instruments to the trojan asteroids and

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we'll be able to see how the surface

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composition varies across the trojan

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asteroids

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additionally we have really large solar

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arrays because we are solar-powered

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spacecraft the spacecraft gets its power

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from the sun at the trojan asteroids

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we're more than five times further from

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the sun than earth is so there's much

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less light we need large solar arrays to

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power our spacecraft and in fact we will

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be

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the furthest operating spacecraft