{"id":1301,"date":"2021-06-26T00:02:05","date_gmt":"2021-06-25T15:02:05","guid":{"rendered":"http:\/\/www.miyamoto-lab.com\/?page_id=1301"},"modified":"2021-07-07T09:46:56","modified_gmt":"2021-07-07T00:46:56","slug":"878hsdfguosd","status":"publish","type":"page","link":"https:\/\/www.miyamoto-lab.com\/ja\/878hsdfguosd\/","title":{"rendered":"Chapter 3: Let\u2019s learn about Asteroid Ryugu with Otama!"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Size: 1\/14646 of the Earth; 870m in diameter<br>Weight: Lighter than Earth; 450,000,000,000kg<br>Temperature: Very much higher and colder than the Earth; -50 to 60 degrees Celcius<br>Density: Heavier than water, 1.27g\/cm3<br>Composition: Rocks with carbon<br>Satellite: No satellite<br>Recent exploration missions: Hayabusa 2 by JAXA (2018-2019)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Something curious about the <\/strong>Ryugu<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">1. How is the brightness\/darkness?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ryugu is really dark and too black to reflect the sunlight. This is because Ryugu contains lots of carbon; it\u2019s like pencil tips and black inks used for Japanese calligraphy. By the way, do you know that all living creatures on Earth contained carbon inside? Researchers think that carbons composing lives on Earth might have been brought by asteroids, like Ryugu, a long time ago.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. What is its birthplace?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We don\u2019t really know when or where Ryugu was made. But we know that Ryugu has very low density, which means that it has lots of voids. And the voids may have resulted from rocks\u2019 repetitious impacts on each other. Ryugu is close to Earth now, but scientists believe it was located in the asteroid belt, far from Mars, 9 million years ago. More than 1 million asteroids like Ryugu exist in the asteroid belt between Mars and Jupiter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Jumping up!<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ryugu\u2019s gravity is approximately 1\/80,000th, which means we would feel our weight much lighter if we were standing up on Ryugu. If we jumped up hard on Ryugu, we wouldn\u2019t be able to come back to Ryugu again. Ryugu has so many rocks, and thus building a house on Ryugu would be complicated. Besides, since Ryugu is moving across the path of Earth, Ryugu will likely hit Earth someday in the future. Thus, overall, living on Ryugu would be very difficult!<\/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;no atmosphere with too little gravity<\/li><li>Humans can breathe there (Yes or No): No, no atmosphere at all<\/li><li>Humans can walk on the surface there (Yes or No): Yes, but if you jump, you&#8217;ll not be there<\/li><li>The temperature of its surface is (Hot or Cold): Hot and Cold!<\/li><li>It is a (sinking or floating) object: Sinking, it&#8217;s made of rocks<\/li><li>Water exists there (Yes or No): Yes and No; no liquid water but some rocks contain water<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Size: 1\/14646 of the Earth; 870m in diameterWeight: Lighter than Earth; 450,000,000,000kgTemperature: Very muc [&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=1301","footnotes":""},"class_list":["post-1301","page","type-page","status-publish","hentry","ja"],"_links":{"self":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1301","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=1301"}],"version-history":[{"count":5,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1301\/revisions"}],"predecessor-version":[{"id":1330,"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/pages\/1301\/revisions\/1330"}],"wp:attachment":[{"href":"https:\/\/www.miyamoto-lab.com\/wp-json\/wp\/v2\/media?parent=1301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}