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00:02 >> There aren't many classes of objects left in our solar system that we haven't
00:07 looked at up close with a spacecraft.
00:10 And one of them that's left is the metal asteroids.
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00:15 >> 16 Psyche is an asteroid that orbits the sun out between Mars and Jupiter.
00:20 >> The reason that Psyche is unique is that it is metal rich.
00:24 >> It's believed that it may be a remnant core of an early planetesimal that was
00:29 formed in the very, very earliest parts of the formation of the solar system.
00:33 >> And after this planet started forming and this metal core formed inside of that,
00:37 it collided with other bodies that then stripped off the rocky mantle,
00:41 leaving this core in place.
00:43 >> This is the part of planets that we can't sample directly today.
00:50 >> It's too hot, the pressure's too high, our instruments would melt.
00:52 Can't drill a hole that deep in the Earth or other planets.
00:55 So how do we study the core of our planet?
00:58 >> Psyche gives us the opportunity to visit a core the only way that humankind
01:02 can ever do.
01:03 And it would be the first metal object that humankind has ever visited.
01:06 [MUSIC]
01:10 >> After launch, we cruise through interplanetary space for a number of years.
01:15 First, we fly by Mars for
01:17 gravity assist that'll slingshot us into the asteroid belt.
01:21 And then we're thrusting all the way from there to finally arriving at Psyche.
01:25 [MUSIC]
01:29 We'll go into four orbits to collect the necessary measurements that we need from
01:34 our three primary instruments.
01:36 >> So our payload consists of a couple of imagers,
01:39 which are cameras that take pictures of Psyche.
01:42 Also a gamma ray neutron spectrometer,
01:44 which allows us to measure the elemental composition of the surface of Psyche.
01:47 And then a magnetometer,
01:48 which will allow us to detect any magnetic field that's left at Psyche.
01:52 If Psyche still has some sort of remnant magnetic field,
01:56 that probably tells us it really was a core.
01:58 It's a strong indicator.
01:59 We also use the radio on the spacecraft as an instrument, so
02:02 we can map out the gravity and map out the interior structure that way.
02:07 >> We're using a particular thruster technology,
02:11 Hall Effect thruster technology.
02:12 They operate five times more efficiently than normal rockets, so
02:15 they use a lot less fuel, and
02:17 is what allows us to get into orbit around this asteroid.
02:20 >> Solar electric propulsion has been around for quite a while, and
02:23 it has flown before, but we are continuing to push the boundaries.
02:27 We're gonna have big five panel fold out solar panels
02:31 that will provide the electricity for the thrusters,
02:34 which use as propellant the noble gas xenon.
02:38 >> This will be the first time that Hall Effect thrusters have flown in deep space.
02:41 >> Studying the evolution of a planetary body is a detective story.
02:48 There's a magic to when you actually are on the launch pad, and
02:52 you say, we're go for launch.
02:53 >> And you feel like singing and dancing, and
02:56 you feel like throwing up at the same time.
02:58 >> Let's go discover things about our solar system that we have no other way to do.
03:02 I think that it's fundamental to who we are, and also who we should be.
03:06 It's an incredible opportunity to be a part of the team making that happen.
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03:30 [MUSIC]
03:40 (upbeat music)
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