{"id":13523,"date":"2019-11-14T12:25:27","date_gmt":"2019-11-14T12:25:27","guid":{"rendered":"http:\/\/uni.hi.is\/einar\/?p=13523"},"modified":"2019-11-14T12:25:27","modified_gmt":"2019-11-14T12:25:27","slug":"stjarnedlisfraedingurinn-gisli-hlodver-palsson-odru-nafni-jack-g-hills","status":"publish","type":"post","link":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/?p=13523","title":{"rendered":"Stjarne\u00f0lisfr\u00e6\u00f0ingurinn G\u00edsli Hl\u00f6\u00f0ver P\u00e1lsson, \u00f6\u00f0ru nafni Jack G. Hills"},"content":{"rendered":"<p>\u00deetta stutta yfirlit var upphaflega birt \u00ed september 2018 sem hluti af f\u00e6rslunni <a href=\"http:\/\/uni.hi.is\/einar\/2018\/09\/19\/halastjornur-fyrr-og-nu-3-tuttugasta-old\/http:\/\/uni.hi.is\/einar\/2018\/09\/19\/halastjornur-fyrr-og-nu-3-tuttugasta-old\/\">Halastj\u00f6rnur fyrr og n\u00fa &#8211; 3. Tuttugasta \u00f6ld<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: center\"><strong><span style=\"font-size: 14pt\">G\u00edsli Hl\u00f6\u00f0ver P\u00e1lsson<\/span><br \/>\n<\/strong><\/h3>\n<p>Foreldrar Keflv\u00edkingsins G\u00edsla Hl\u00f6\u00f0vers voru \u00feau Krist\u00edn G\u00edslad\u00f3ttir og P\u00e1ll S. P\u00e1lsson. \u00c1ri\u00f0 1949 fluttist hann til Bandar\u00edkjanna me\u00f0 m\u00f3\u00f0ur sinni, \u00fe\u00e1 sex \u00e1ra gamall. \u00cd hinu n\u00fdja landi t\u00f3k hann upp \u00e6ttarnafn stj\u00fapf\u00f6\u00f0urs s\u00edns og nefndist eftir \u00fea\u00f0 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Jack_G._Hills\">Jack Gilbert Hills<\/a>.<\/p>\n<p>G\u00edsli Hl\u00f6\u00f0ver\/Hills vakti snemma athygli fyrir fram\u00farskarandi h\u00e6fileika \u00e1 svi\u00f0i raunv\u00edsinda, einkum \u00fe\u00f3 stj\u00f6rnufr\u00e6\u00f0i og e\u00f0lisfr\u00e6\u00f0i, eins og sj\u00e1 m\u00e1 \u00e1 \u00feessum \u00edslenska fr\u00e9ttapistli:<\/p>\n<ul>\n<li>Morgunbla\u00f0i\u00f0, 1. mars 1962: <a href=\"http:\/\/timarit.is\/view_page_init.jsp?pageId=1341538\">Menn og m\u00e1lefni<\/a>.<\/li>\n<\/ul>\n<p>\u00c1ri\u00f0 1969 lauk Hills doktorspr\u00f3fi \u00ed stjarne\u00f0lisfr\u00e6\u00f0i fr\u00e1 Michigah\u00e1sk\u00f3la me\u00f0 ritger\u00f0 um uppruna og \u00fer\u00f3un s\u00f3lkerfisins. \u00deetta verk hans vakti talsver\u00f0a athygli:<\/p>\n<ul>\n<li>Timinn, 2. apr\u00edl 1970: <a href=\"http:\/\/timarit.is\/view_page_init.jsp?pageId=3681727\">Ungur Keflv\u00edkingur hl\u00fdtur vi\u00f0urkenningu \u00ed Bandar\u00edkjunum sem v\u00edsindama\u00f0ur.<\/a><\/li>\n<li>Jack G. Hills, 1970: <a href=\"https:\/\/www.nature.com\/articles\/225840a0\">Dynamic Relaxation of Plaetary Systems and Bode&#8217;s Law.<\/a><\/li>\n<li>Jack G. Hills, 1970: <a href=\"http:\/\/articles.adsabs.harvard.edu\/full\/1970BAAS....2S.320H\">The Formation of the Terrestrial Planets.<\/a><\/li>\n<\/ul>\n<p>A\u00f0 n\u00e1mi loknu vann Hills \u00e1fram a\u00f0 ranns\u00f3knum \u00ed stjarne\u00f0lisfr\u00e6\u00f0i vi\u00f0 Michiganh\u00e1sk\u00f3la og fleiri sk\u00f3la. \u00c1ri\u00f0 1981 \u00fe\u00e1\u00f0i hann svo st\u00f6\u00f0u sem stjarne\u00f0lisfr\u00e6\u00f0ingur vi\u00f0 <a href=\"https:\/\/www.lanl.gov\/org\/padste\/adtsc\/theoretical\/nuclear-particle-physics-astrophysics-cosmology\/index.php\">Los Alamos Ranns\u00f3knarstofnunina<\/a> \u00ed N\u00fdju Mex\u00edk\u00f3.<\/p>\n<div id=\"attachment_5973\" class=\"wp-caption aligncenter\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-5973\" src=\"http:\/\/uni.hi.is\/einar\/files\/2018\/07\/JackHills79-300x256.jpg\" alt=\"\" width=\"478\" height=\"408\" aria-describedby=\"caption-attachment-5973\" srcset=\"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/wp-content\/uploads\/2018\/07\/JackHills79-300x256.jpg 300w, https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/wp-content\/uploads\/2018\/07\/JackHills79.jpg 692w\" sizes=\"(max-width: 478px) 100vw, 478px\" \/><\/p>\n<p id=\"caption-attachment-5973\" class=\"wp-caption-text\">Pr\u00f3fessor Jack G. Hills \u00e1 skrifstofu sinni \u00ed stjarne\u00f0lisfr\u00e6\u00f0ideild r\u00edkish\u00e1sk\u00f3lans \u00ed Michigan \u00e1ri\u00f0 1979.<\/p>\n<\/div>\n<p>Jack Hills er s\u00e9rfr\u00e6\u00f0ingur \u00ed \u00fatreikninum \u00e1 hreyfingu himintungla, svi\u00f0i sem kalla m\u00e6tti <a href=\"https:\/\/en.wikipedia.org\/wiki\/Stellar_dynamics\">stj\u00f6rnuaflfr\u00e6\u00f0i<\/a> \u00e1 \u00edslensku, og \u00fear hefur hann gert \u00fdmsar mikilv\u00e6gar uppg\u00f6tvanir. Fyrir utan \u00e1\u00f0urnefndar ni\u00f0urst\u00f6\u00f0ur um reikistj\u00f6rnukerfi, f\u00e6r\u00f0i hann me\u00f0al annars r\u00f6k fyrir \u00fev\u00ed \u00e1ri\u00f0 1981, a\u00f0 flesta halastj\u00f6rnukjarna s\u00e9 a\u00f0 finna, ekki \u00ed hinu fjarl\u00e6ga <a href=\"https:\/\/en.wikipedia.org\/wiki\/Oort_cloud\">Oort-sk\u00fdi<\/a>, heldur \u00ed sk\u00edfulaga sv\u00e6\u00f0i \u00ed plani s\u00f3lkerfisins fyrir utan svokalla\u00f0 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Kuiper_belt\">Kuiper-belti<\/a>. \u00deessi sk\u00edfa er n\u00fa vi\u00f0 hann kennd og k\u00f6llu\u00f0\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Hills_cloud\">Hills-sk\u00fdi\u00f0<\/a>, en stundum er einnig tala\u00f0 um <em>innra Oort-sk\u00fdi\u00f0<\/em>.<\/p>\n<ul>\n<li>J. G. Hills, 1981:\u00a0 <a href=\"http:\/\/adsbit.harvard.edu\/\/full\/1981AJ.....86.1730H\/0001730.000.html\">Comet showers and the steady-state infall of comets from the Oort cloud.<\/a><\/li>\n<\/ul>\n<div id=\"attachment_5974\" class=\"wp-caption aligncenter\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-5974\" src=\"http:\/\/uni.hi.is\/einar\/files\/2018\/07\/OortCloud-300x258.jpg\" alt=\"\" width=\"491\" height=\"423\" aria-describedby=\"caption-attachment-5974\" srcset=\"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/wp-content\/uploads\/2018\/07\/OortCloud-300x258.jpg 300w, https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/wp-content\/uploads\/2018\/07\/OortCloud.jpg 460w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/><\/p>\n<p id=\"caption-attachment-5974\" class=\"wp-caption-text\">\u00c1 \u00feessari sk\u00fdringarmynd er stj\u00f6rnukerfi\u00f0, sem vi\u00f0 k\u00f6llum venjulega s\u00f3lkerfi\u00f0 okkar, \u00ed mi\u00f0junni. \u00dear fyrir utan er sk\u00edfulaga Kuiper-belti\u00f0 (lita\u00f0 lj\u00f3sbl\u00e1tt). Sk\u00edfan fyrir utan Kuiper-belti\u00f0 er Hills-belti\u00f0. Hi\u00f0 k\u00falulaga Oort-sk\u00fd umlykur svo allt saman.<\/p>\n<\/div>\n<p>\u00c1 n\u00edunda og t\u00edunda \u00e1ratugnum vann Hills me\u00f0al annars a\u00f0 ranns\u00f3knum \u00e1 hreyfingum sm\u00e1stirna og halastjarna \u00ed s\u00f3lkerfinu og \u00e1hrifum hugsanlegra \u00e1rekstra sl\u00edkra fyrirb\u00e6ra vi\u00f0 j\u00f6r\u00f0ina:<\/p>\n<ul>\n<li>J. G. Hills og M. P. Goda, 1993:\u00a0 <a href=\"http:\/\/adsabs.harvard.edu\/full\/1993AJ....105.1114H\">The fragmentation of small asteroids in the atmosphere.<\/a><\/li>\n<li>J. G. Hills og\u00a0 C. L. Mader, 1997: <a href=\"https:\/\/nyaspubs.onlinelibrary.wiley.com\/doi\/abs\/10.1111\/j.1749-6632.1997.tb48352.x\">Tsunami Produced by the Impact of Small Asteroids.<\/a><\/li>\n<li>J. G. Hills og M. P. Goda, 1999: <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167278999000913?via%3Dihub\">Damage from comet-asteroid impacts with Earth.<\/a><\/li>\n<li>Morgunbla\u00f0i\u00f0, 1998 (vi\u00f0tal vi\u00f0 Hills): <a href=\"http:\/\/timarit.is\/view_page_init.jsp?pageId=1910191\">Eins og \u00feruma \u00far hei\u00f0sk\u00edru lofti.<\/a><\/li>\n<li>Kvikmyndin <a href=\"https:\/\/en.wikipedia.org\/wiki\/Deep_Impact_(film)\">Deep Impact<\/a> fr\u00e1 1998.<\/li>\n<\/ul>\n<p>\u00c1ri\u00f0 2005 fannst s\u00f3lstjarna, sem fer\u00f0a\u00f0ist me\u00f0 ofsahra\u00f0a \u00ed gegnum Vetrarbrautina. Flj\u00f3tlega kom \u00ed lj\u00f3s, a\u00f0 Hills haf\u00f0i sp\u00e1\u00f0 fyrir um tilvist sl\u00edkra stjarna sautj\u00e1n \u00e1rum \u00e1\u00f0ur:<\/p>\n<ul>\n<li>Jack G. Hills, 1988:\u00a0 <a href=\"https:\/\/www.nature.com\/articles\/331687a0\">Hyper-velocity and tidal stars from binaries disrupted by a massive Galactic black hole.<\/a><\/li>\n<li>Wikipedia: <a href=\"https:\/\/en.wikipedia.org\/wiki\/Stellar_kinematics#Hypervelocity_stars\">Hypervelocity stars<\/a>.<\/li>\n<li>Lifandi v\u00edsindi, 2010: <a href=\"https:\/\/www.visindi.is\/grein\/stjornur-flyja-fra-utskyringum-fraedimanna\">Stj\u00f6rnur fl\u00fdja fr\u00e1 \u00fatsk\u00fdringum fr\u00e6\u00f0imanna.<\/a><\/li>\n<li>BBC, 2015: <a href=\"http:\/\/www.bbc.com\/earth\/story\/20150907-the-fastest-stars-in-the-universe\">Hypervelocity stars wander cosmos.<\/a><\/li>\n<\/ul>\n<p>Hills hefur unni\u00f0 a\u00f0 m\u00f6rgum \u00f6\u00f0rum \u00e1hugaver\u00f0um verkefnum \u00e1 svi\u00f0i stj\u00f6rnuaflfr\u00e6\u00f0i. Eftirfarandi listi gefur g\u00f3\u00f0a mynd af helstu vi\u00f0fangsefnum hans:<\/p>\n<ul>\n<li>Jack G. Hills: <a href=\"http:\/\/adsabs.harvard.edu\/cgi-bin\/nph-abs_connect?db_key=AST&amp;db_key=PRE&amp;qform=AST&amp;arxiv_sel=astro-ph&amp;arxiv_sel=cond-mat&amp;arxiv_sel=cs&amp;arxiv_sel=gr-qc&amp;arxiv_sel=hep-ex&amp;arxiv_sel=hep-lat&amp;arxiv_sel=hep-ph&amp;arxiv_sel=hep-th&amp;arxiv_sel=math&amp;arxiv_sel=math-ph&amp;arxiv_sel=nlin&amp;arxiv_sel=nucl-ex&amp;arxiv_sel=nucl-th&amp;arxiv_sel=physics&amp;arxiv_sel=quant-ph&amp;arxiv_sel=q-bio&amp;sim_query=YES&amp;ned_query=YES&amp;adsobj_query=YES&amp;aut_logic=OR&amp;obj_logic=OR&amp;author=HIlls%2C+Jack+G%2C&amp;object=&amp;start_mon=&amp;start_year=&amp;end_mon=&amp;end_year=&amp;ttl_logic=OR&amp;title=&amp;txt_logic=OR&amp;text=&amp;nr_to_return=200&amp;start_nr=1&amp;jou_pick=ALL&amp;ref_stems=&amp;data_and=ALL&amp;group_and=ALL&amp;start_entry_day=&amp;start_entry_mon=&amp;start_entry_year=&amp;end_entry_day=&amp;end_entry_mon=&amp;end_entry_year=&amp;min_score=&amp;sort=SCORE&amp;data_type=SHORT&amp;aut_syn=YES&amp;ttl_syn=YES&amp;txt_syn=YES&amp;aut_wt=1.0&amp;obj_wt=1.0&amp;ttl_wt=0.3&amp;txt_wt=3.0&amp;aut_wgt=YES&amp;obj_wgt=YES&amp;ttl_wgt=YES&amp;txt_wgt=YES&amp;ttl_sco=YES&amp;txt_sco=YES&amp;version=1\">Greinar fr\u00e1 og me\u00f0 1970<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u00deetta stutta yfirlit var upphaflega birt \u00ed september 2018 sem hluti af f\u00e6rslunni Halastj\u00f6rnur fyrr og n\u00fa &#8211; 3. Tuttugasta \u00f6ld. &nbsp; G\u00edsli Hl\u00f6\u00f0ver P\u00e1lsson Foreldrar Keflv\u00edkingsins G\u00edsla Hl\u00f6\u00f0vers voru \u00feau Krist\u00edn G\u00edslad\u00f3ttir og P\u00e1ll S. P\u00e1lsson. \u00c1ri\u00f0 1949 fluttist hann til Bandar\u00edkjanna me\u00f0 m\u00f3\u00f0ur sinni, \u00fe\u00e1 sex \u00e1ra gamall. \u00cd hinu n\u00fdja landi t\u00f3k [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=\/wp\/v2\/posts\/13523"}],"collection":[{"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13523"}],"version-history":[{"count":0,"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=\/wp\/v2\/posts\/13523\/revisions"}],"wp:attachment":[{"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wizardly-antonelli.176-10-35-210.plesk.page\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}