1 00:00:00,000 --> 00:00:08,050 Sound Effect "Bell" 2 00:00:08,050 --> 00:00:16,090 Our star the sun is a big ball of gas and it's 99 percent of our solar's systems mass 3 00:00:16,090 --> 00:00:24,140 It's an average star in our Milky Way Warming the Earth every day 4 00:00:24,140 --> 00:00:32,180 What powers our Sun and makes it so bright? Come on and tell me, what makes all that light? 5 00:00:32,180 --> 00:00:40,240 Hans Bethe long ago reached the conclusion it changes Hydrogen to Helium by nuclear fusion. When fusion takes place 6 00:00:40,240 --> 00:00:48,300 light is created and it makes its way out (although rather belated) through the Photosphere, that's the part that we see, the light comes out 7 00:00:48,300 --> 00:00:56,360 and shines on you and me. Oooohhh. About a million Earths could fit in the sun, 8 00:00:56,360 --> 00:01:04,370 but if you were there you wouldn't have much fun. It's six thousand degrees at the photosphere 9 00:01:04,370 --> 00:01:12,400 and much hotter inside the solar atmosphere. There are a few places where it's not so hot, like at the center of a big sunspot. 10 00:01:12,400 --> 00:01:20,410 But heat is relative, it's still pretty warm sitting on a sun spot would do you great harm. 11 00:01:20,410 --> 00:01:28,420 Galileo discovered sunspots. What are those things, those funny dots? 12 00:01:28,420 --> 00:01:36,420 They're cooler parts, scientists feel, caused by a stronger magnetic field. The spots move around the 13 00:01:36,420 --> 00:01:44,440 the face of the Sun, proving to all...... solar rotation! A strange kind of movement, to do a full roll, 14 00:01:44,440 --> 00:01:52,460 25 days in the middle, 36 at the poles. What about flares? 15 00:01:52,460 --> 00:02:00,470 I've hard of them here. They're like giant explosions in the Chromosphere. The magnetic fields above those sunspots, reconnecting 16 00:02:00,470 --> 00:02:08,490 again after being in knots. Above the Chromosphere the Corona is placed, it's millions of degrees and reaches way into 17 00:02:08,490 --> 00:02:16,500 space. It's very thin, but read my lips, that's the part that you see in a solar eclipse. 18 00:02:16,500 --> 00:02:24,520 That's the end of our song about Mr. Sun. We hope that you find that learning is fun, 19 00:02:24,520 --> 00:02:32,550 but never look at the Sun you could go blind, just keep on enjoying that warm sunshine.