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[Music]

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we need to understand his Sun because

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the Sun changes our lives every day we

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all know that the Sun makes the weather

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but when we're flying things in space

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astronauts satellites the Sun affects

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them even more directly the Sun puts out

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what we call space weather space weather

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causes problems with our satellites our

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astronauts our communication systems

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here on earth and our navigation systems

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we need to know more about how the Sun

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works where the magnetic field of the

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Sun comes from and how that magnetic

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field is converted in the space weather

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HMI is the helioseismic and magnetic

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imager very long words for something

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that's very useful to look at on the Sun

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the helioseismic refers to the sound

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waves that we can measure the surface of

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the Sun that when we carefully analyze

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them we can look inside the Sun and see

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what's happening under the surface of

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the Sun and even what's happening on the

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other side of the Sun it's much like how

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we use the waves from earthquakes to

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know where the earthquake happened how

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big it was to learn about what's inside

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the earth from earthquakes at the same

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time HM I will produce map of the

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magnetic field of the Sun we're all

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familiar with the magnetic field of the

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earth we use our compasses to point our

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way with that on the Sun the magnetic

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field is much more complicated and it

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comes up as little tiny pieces at

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magnetic field all over the Sun when

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they get together it can be called

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active regions very strong magnetic

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but nonetheless there's a magnetic field

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all over the Sun for many years people

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studied only the active regions that was

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the thing that people really were

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worried about we now understand it you

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have to worry about all the magnetic

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field of the Sun and that's what sto was