{"id":28870,"date":"2022-02-10T00:00:00","date_gmt":"2022-02-10T00:00:00","guid":{"rendered":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/?post_type=purple_issue&p=28870"},"modified":"2022-03-23T13:14:21","modified_gmt":"2022-03-23T13:14:21","slug":"cosmic-bubble-blown-by-supernovae","status":"publish","type":"post","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/2022\/02\/10\/cosmic-bubble-blown-by-supernovae\/","title":{"rendered":"Cosmic bubble blown by supernovae"},"content":{"rendered":"\n

Was the star-forming Local Bubble created by a stellar explosion? <\/p>\n\n

\"\"
Was the star forming-rich Local Bubble created by a stellar explosion?<\/figcaption><\/figure>\n\n

Earth is surrounded <\/strong>by a 1,000 lightyear-wide void, called the Local Bubble, the edge of which is marked by thousands of young stars. Now, thanks to new simulations, astronomers might finally know what caused it \u2013a series of supernovae beginning 14 million years ago which pushed gas outwards, creating dense regions ripe for star formation.<\/p>\n\n

Using observations from the Gaia observatory, astronomers could map out the bubble\u2019s irregular shape and determined that it is drifting through the Galaxy at about 6.5km per second. The simulations used these two pieces of information to reveal that the bubble has been carved out by around 15 supernovae over millions of years.<\/p>\n\n

\u201cWhen the first supernovae that created the Local Bubble went off, our Sun was far away from the action,\u201d says Jo\u00e3o Alves from the University of Vienna, who took part in the study. \u201cBut about five million years ago, the Sun\u2019s path through the Galaxy took it right into the bubble, and now the Sun sits \u2013 just by luck \u2013 almost right in the bubble\u2019s centre.\u201d <\/span>https:\/\/hubblesite.org<\/a><\/p>\n\n

Photo: CFA, LEAH HUSTAK (STSCI)<\/p>\n","protected":false},"excerpt":{"rendered":"

Was the star-forming Local Bubble created by a stellar explosion?<\/p>\n","protected":false},"author":24,"featured_media":28869,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","purple_page_number":"13","purple_custom_meta_purple_page_number":"13","purple_seq_number":"2","purple_custom_meta_purple_seq_number":"2","purple_source_article":"article_13-2.xml","purple_custom_meta_purple_source_article":"article_13-2.xml","purple_source_issue":"March-2022","purple_custom_meta_purple_source_issue":"March-2022","purple_external_id":"March-2022-13-2","purple_custom_meta_purple_external_id":"March-2022-13-2","purple_issue_code":"|0000086550||","purple_custom_meta_purple_issue_code":"|0000086550||","purple_android_product":"com.im.skyatnight.202","purple_custom_meta_purple_android_product":"com.im.skyatnight.202","purple_ios_product":"com.im.skyatnight.202","purple_custom_meta_purple_ios_product":"com.im.skyatnight.202","purple_web_product":"","purple_custom_meta_purple_web_product":"","purple_publication_id":"075fab74-0a21-4201-866a-899d6c41c40c","purple_migrated":"","kt_blocks_editor_width":""},"categories":[19],"tags":[14],"featured_image_src":"https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926.jpg","author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"acf":{"readingTimeMinutes":"< 1","apple_news_title":""},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926.jpg",1040,726,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926-300x209.jpg",300,209,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926-768x536.jpg",768,536,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926-1024x715.jpg",800,559,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926.jpg",1040,726,false],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2022\/02\/e6c5f28d-2e9e-419c-8e8e-0b7c3432e926.jpg",1040,726,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"Was the star-forming Local Bubble created by a stellar explosion?","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/28870"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/comments?post=28870"}],"version-history":[{"count":3,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/28870\/revisions"}],"predecessor-version":[{"id":29718,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/posts\/28870\/revisions\/29718"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media\/28869"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=28870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=28870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/tags?post=28870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}