{"id":1288,"date":"2021-06-25T23:59:05","date_gmt":"2021-06-25T14:59:05","guid":{"rendered":"http:\/\/www.miyamoto-lab.com\/?page_id=1288"},"modified":"2021-07-07T09:26:09","modified_gmt":"2021-07-07T00:26:09","slug":"98gdfjiadsfi","status":"publish","type":"page","link":"https:\/\/www.miyamoto-lab.com\/ja\/98gdfjiadsfi\/","title":{"rendered":"Chapter 1: Let\u2019s learn about the Sun with Kotetsu!"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Size: 109 times larger than the Earth<br>Weight: Far heavier than Earth; 2,000,000,000,000,000,000,000,000,000,000kg!<br>Temperature: Very much higher than the Earth; 6000 degrees Celsius at the surface!<br>Density: Heavier than water, 1.4g\/cm3<br>Composition: Hydrogen and Helium<br>Satellite: No satellite as the definition (8 planets)<br>Recent exploration missions: SOHO by NASA\/ESA (1996-); Parker solar probe by NASA (2018-)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Something curious about the Sun<\/strong><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">1. What does it made of?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Sun is mainly made up of hydrogen and helium gases. Hydrogen is the lightest element and helium is the second in space. Helium itself was created by combining some hydrogen inside of the Sun. Heavy matter such as rocks and pebbles do not exist on the Sun, so its density is quite low. But the Sun is the largest and the heaviest star in our solar system because it is made with enormous amounts of hydrogen and helium. We could say that the Sun takes up 99.89% of the weight of our whole solar system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Why is it so bright?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When we go outside on a sunny summer day, sunlight enters our eyes, and we feel it is too bright. That is because the outer layer of the Sun is shining. As you know, if we turn on a light in our house, light a bonfire or a stove, there is a bright ring around the center light. But the reason why the Sun is so bright is not exactly the same. Helium combines with hydrogen in the center of the Sun. As these gases mix, an enormous amount of energy is generated and released from the center of the Sun. While that energy is carried from inside to outside, it will accompany the light. This light moving away from the Sun makes it glow so brightly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. How will the Sun look in 4.6 billion years?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Do you know how old the Sun is now? The Sun is already 4.6 billion years old! Yes, the Sun was formed 4.6 billion years ago. However, because it is made of gases, it cannot continue to glow forever. All of the Hydrogen in the center of the Sun will be turned to helium in 5 billion years. As it gets bigger, it will separate into the core and outside layers. Only the outer layers will keep getting bigger, while the core will be shrunk to be a dark star. Afterward, the Sun will disappear after its huge outer layers become a ring.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Checklist<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Humans can live there (Yes or No): No&#8230;too hot!<\/li><li>Humans can breathe there (Yes or No): No, no oxygen<\/li><li>Humans can walk on the surface there (Yes or No): No, too hot and being made of gas<\/li><li>The temperature of its surface is (Hot or Cold): Hot, very hot!<\/li><li>It is a (sinking or floating) object: N\/A&#8230;too hot to keep the water liquid<\/li><li>Water exists there (Yes or No): No, not at all!<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Size: 109 times larger than the EarthWeight: Far heavier than Earth; 2,000,000,000,000,000,000,000,000,000,000 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_locale":"ja","_original_post":"http:\/\/www.miyamoto-lab.com\/?page_id=1288","footnotes":""},"class_list":["post-1288","page","type-page","status-publish","hentry","ja"],"_links":{"self":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/comments?post=1288"}],"version-history":[{"count":6,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1288\/revisions"}],"predecessor-version":[{"id":1323,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1288\/revisions\/1323"}],"wp:attachment":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/media?parent=1288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}