{"id":711,"date":"2017-03-07T15:23:28","date_gmt":"2017-03-07T15:23:28","guid":{"rendered":"http:\/\/starrydave.com\/?p=711"},"modified":"2020-08-22T12:58:57","modified_gmt":"2020-08-22T12:58:57","slug":"when-galaxies-collide","status":"publish","type":"post","link":"http:\/\/starrydave.com\/?p=711","title":{"rendered":"When Galaxies Collide"},"content":{"rendered":"<p><iframe loading=\"lazy\" title=\"Galactic Collision\" width=\"695\" height=\"391\" src=\"https:\/\/www.youtube.com\/embed\/Pf5IwwIIy20?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>I made this simulation a few years ago in my StarryOrbits gravity laboratory app. It uses a simplified model of the galaxies with the core stars in red or blue and the halo stars in yellow or green. Newton&#8217;s laws of motion are then used to predict what will happen in the future. The simulation repeats a few times so you can watch it properly. What is interesting is that the 2 galaxy cores stay mostly intact even after they have passed thru each other a few times. It is actually better to watch it in StarryOrbits because it has a 3D viewer that lets you rotate, pan and zoom while the animation is playing. Great to have a couple of galaxies on your PC to play with.<\/p>\n<p>Unfortunately, changes to Java security policy means I can no longer distribute the original StarryOrbits. However, I am looking at rewriting it to take advantage of modern multicore CPUs and GPUs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I made this simulation a few years ago in my StarryOrbits gravity laboratory app. It uses a simplified model of the galaxies with the core stars in red or blue and the halo stars in yellow or green. Newton&#8217;s laws of motion are then used to predict what will happen in the future. The simulation <a href='http:\/\/starrydave.com\/?p=711' class='excerpt-more'>[&#8230;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-711","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-1-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"_links":{"self":[{"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/posts\/711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/starrydave.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=711"}],"version-history":[{"count":7,"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions"}],"predecessor-version":[{"id":1191,"href":"http:\/\/starrydave.com\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions\/1191"}],"wp:attachment":[{"href":"http:\/\/starrydave.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/starrydave.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=711"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/starrydave.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}