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Those changes in the Sun we see here at the Earth as well.

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We call those effects here at the Earth "Space Weather." The Living With

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a Star program was developed at NASA to bring together all the people

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who study space weather. The Solar Dynamics Observatory is the first

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mission of NASA's Living With a Star program. It's designed to study the Sun

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--the root of space weather. SDO has a couple of improvements.

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The easiest one to think about is that we have better cameras. We take a camera

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that's twice as big as the best one in space, and we fly a whole bunch

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of them on a satellite. Our cameras are 4K by 4K

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pixels, so that's about 16 million pixels sitting on each camera.

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We can see images of the full disk of the Sun. To see the whole sun

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in high resolution is better than seeing just a little bit of the Sun in high

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resolution. If we look at a little bit of the sun, and we see something happen,

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every once in a while, we'll see that something  came in from the side. So you're

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sitting there watching it and you say, "Ooh, that's cool! That's what I wanted to study! How did that happen?

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Why did that happen?" So, you widen out. So now you see what you wanted to see,

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and you see that wave come in. But the most important thing is that we're gonna take pictures

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very frequently. The best we've done so far were full disk images of the sun

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is every three minutes. And we're gonna take 'em every ten seconds. That's a lot

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faster, and we'll be able to see things that happen on the Sun very quickly

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that right now we skip, we just--we miss. It's like we look at the tops of

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the mountains and we miss the valleys in between. SDO will also study

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the amount of energy the Sun puts off in extreme ultraviolet wavelengths.

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These are very short wavelengths that get absorbed very high up in our atmosphere

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--causes the atmosphere to heat, expand, and bring satellites

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out of orbit. Previous missions have looked at the extreme ultraviolet irradiance

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every...90 minutes. We're gonna look at it every ten seconds.

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And we're gonna see a lot of new stuff, and we're gonna learn a lot.

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The magnetic field is also looked at. We know that this is

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important because we've never understood the direction of the magnetic

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field before. And that's part of our research--is to figure out what's happening to the magnetic

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field of the Sun, and by knowing its direction, that gives us another piece of information

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to understand where it comes from and how it gets converted into solar activity.

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The instruments on SDO are designed

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to work together. One measures magnetic field, one measures what the magnetic

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field does, and one measures what we see that affects us here at the

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Earth. SDO would like to be able to predict space weather so that we

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can look at the Sun, know something's going to happen, and call people

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up and let them know.  <>