{"id":26737,"date":"2021-11-17T09:34:12","date_gmt":"2021-11-17T09:34:12","guid":{"rendered":"https:\/\/www.skyatnightmagazine.com\/?p=101969"},"modified":"2021-11-17T09:43:10","modified_gmt":"2021-11-17T09:43:10","slug":"why-are-there-so-many-different-kinds-of-planet","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/rss_feed\/why-are-there-so-many-different-kinds-of-planet\/","title":{"rendered":"Why are there so many different kinds of planet?"},"content":{"rendered":"

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By Lewis Dartnell\n \t\t<\/p>

Published: Wednesday, 17 November 2021 at 12:00 am<\/p>

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P<\/span>rotoplanetary discs provide the raw materials that planets are assembled from. Within this swirling skirt of dust and gas surrounding a newly forming star, grains collide and coalesce together to create pebbles, which themselves amalgamate into large boulders, then planetesimals, and finally fully grown planets.<\/span><\/p>\n

The exact composition of the local protoplanetary neighbourhood therefore determines the composition of each planet and is ultimately why, for example, Earth turned out so different from Mars<\/a> or Neptune<\/a>.<\/span><\/p>\n

Interview: How do planets form?<\/a><\/strong><\/em><\/li>\n<\/ul>
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