Hubble astronomers have uncovered, for the first time, a population of infant stars in the Milky Way satellite galaxy, the Small Magellanic Cloud (SMC, visible to the naked eye in the southern constellation Tucana), located 210,000 light-years away.
Hubble's exquisite sharpness plucked out an underlying population of infant stars embedded in the nebula NGC 346 that are still forming from gravitationally collapsing gas clouds. They have not yet ignited their hydrogen fuel to sustain nuclear fusion. The smallest of these infant stars is only half the mass of our Sun.
Although star birth is common within the disk of our galaxy, this smaller companion galaxy is more primeval in that it lacks a large percentage of the heavier elements that are forged in successive generations of stars through nuclear fusion.
Fragmentary galaxies like the SMC are considered primitive building blocks of larger galaxies. Most of these types of galaxies existed far away, when the universe was much younger. The SMC offers a unique nearby laboratory for understanding how stars arose in the early universe. Nestled among other starburst regions with the small galaxy, the nebula NGC 346 alone contains more than 2,500 infant stars.
The Hubble images, taken with the Advanced Camera for Surveys, identify three stellar populations in the SMC and in the region of the NGC 346 nebula — a total of 70,000 stars. The oldest population is 4.5 billion years, roughly the age of our Sun. The younger population arose only 5 million years ago (about the time Earth's first hominids began to walk on two feet). Lower-mass stars take longer to ignite and become full-fledged stars, so the protostellar population is 5 million years old. Curiously, the infant stars are strung along two intersecting lanes in the nebula, resembling a "T" pattern in the Hubble plot.
Français : Nébuleuse NGC 346 dans le petit nuage de Magellan
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or . For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.
Small Magellanic Cloud (Nube Menor de Magallanes), imagen procedente de [http://www.spacetelescope.org/images/html/zoomable/heic0502a.html] y [http://antwrp.gsfc.nasa.gov/apod/ap050118.html]
ไฟล, small, magellanic, cloud, ไฟล, ประว, ไฟล, หน, าท, ภาพน, การใช, ไฟล, วนกลาง, อม, ลเก, ยวก, บภาพขนาดของต, วอย, างน, กเซล, ความละเอ, ยดอ, กเซล, กเซล, กเซล, กเซล, กเซล, กเซล, ภาพท, ความละเอ, ยดส, งกว, 8206, กเซล, ขนาดไฟล, เมกะไบต, ชน, ดไมม, image, jpeg, ปภาพห. ifl prawtiifl hnathimiphaphni karichiflswnklang khxmulekiywkbphaphkhnadkhxngtwxyangni 562 600 phikesl khwamlaexiydxun 225 240 phikesl 450 480 phikesl 720 768 phikesl 960 1 024 phikesl 1 919 2 048 phikesl 6 555 6 995 phikesl duphaphthimikhwamlaexiydsungkwa 8206 6 555 6 995 phikesl khnadifl 4 54 emkaibt chnidimm image jpeg rupphaphhruxiflesiyngni tnchbbxyuthi khxmmxns raylaexiyddanlang epnkhxkhwamthiaesdngphlcak ifltnchbbinkhxmmxns khxmmxnsepnewbistinokhrngkarsahrbekbrwbrwmsuxesri thi khunsamarthchwyid khwamyx khaxthibayNGC 346 in Small magellanic cloud jpg Hubble astronomers have uncovered for the first time a population of infant stars in the Milky Way satellite galaxy the Small Magellanic Cloud SMC visible to the naked eye in the southern constellation Tucana located 210 000 light years away Hubble s exquisite sharpness plucked out an underlying population of infant stars embedded in the nebula NGC 346 that are still forming from gravitationally collapsing gas clouds They have not yet ignited their hydrogen fuel to sustain nuclear fusion The smallest of these infant stars is only half the mass of our Sun Although star birth is common within the disk of our galaxy this smaller companion galaxy is more primeval in that it lacks a large percentage of the heavier elements that are forged in successive generations of stars through nuclear fusion Fragmentary galaxies like the SMC are considered primitive building blocks of larger galaxies Most of these types of galaxies existed far away when the universe was much younger The SMC offers a unique nearby laboratory for understanding how stars arose in the early universe Nestled among other starburst regions with the small galaxy the nebula NGC 346 alone contains more than 2 500 infant stars The Hubble images taken with the Advanced Camera for Surveys identify three stellar populations in the SMC and in the region of the NGC 346 nebula a total of 70 000 stars The oldest population is 4 5 billion years roughly the age of our Sun The younger population arose only 5 million years ago about the time Earth s first hominids began to walk on two feet Lower mass stars take longer to ignite and become full fledged stars so the protostellar population is 5 million years old Curiously the infant stars are strung along two intersecting lanes in the nebula resembling a T pattern in the Hubble plot Francais nbsp Nebuleuse NGC 346 dans le petit nuage de Magellan wnthi 12 mkrakhm ph s 2548 aehlngthima NASA http www spacetelescope org images html zoomable heic0502a html http antwrp gsfc nasa gov apod ap050118 html http www hubblesite org gallery album entire pr2005004a http www hubblesite org newscenter archive releases 2005 04 image a phusrangsrrkh NASA ESA and A Nota STScI ESA karxnuyatichsiththi Public domain Public domain false false This file is in the public domain because it was created by NASA and ESA NASA Hubble material and ESA Hubble material prior to 2009 is copyright free and may be freely used as in the public domain without fee on the condition that only NASA STScI and or ESA is credited as the source of the material This license does not apply if ESA material created after 2008 or source material from other organizations is in use The material was created for NASA by Space Telescope Science Institute under Contract NAS5 26555 or for ESA by the Hubble European Space Agency Information Centre Copyright statement at hubblesite org or 2008 copyright statement at spacetelescope org For material created by the European Space Agency on the spacetelescope org site since 2009 use the ESA Hubble tag khabrryayodyyxithyephimkhabrryaythrrthdediywephuxkhyaykhwamwaiflnimixairixethmthiaesdngxyuiniflniprakxbdwywnthisrang wnkxtng12 mkrakhm 2005 prawtiifl khlikwnthi ewlaephuxduiflthipraktinkhnann wnthi ewlarupyxkhnadphuichkhwamehn pccubn12 34 30 krkdakhm 25556 555 6 995 4 54 emkaibt MetronomoBetter quality 03 04 24 knyayn 25492 377 2 217 1 21 emkaibt KordasSmall Magellanic Cloud Nube Menor de Magallanes imagen procedente de http www spacetelescope org images html zoomable heic0502a html y http antwrp gsfc nasa gov apod ap050118 html 05 16 17 mkrakhm 2548169 180 12 kiolibt VlSimpson commonswikiSmall Magellanic Cloud hnathimiphaphni hnatxipni oyngmathiphaphni kracukdawepid karichiflswnklang wikixuntxipniichiflni karichbn ar wikipedia org مسييه 24 سديم أوميجا مسييه 78 مسييه 73 سحابتا ماجلان سديم الشعلة قائمة مجرات المجموعة المحلية NGC 265 NGC 290 NGC 1502 NGC 2100 NGC 2080 القاعدة OB1 LH 95 NGC 281 NGC 2451 NGC 5749 NGC 5986 NGC 5999 NGC 5925 قزمة العنقاء NGC 1049 كوبوسوف I Koposov II NGC 2000 NGC 1624 NGC 7082 NGC 299 NGC 1871 NGC 361 NGC 256 NGC 395 NGC 2301 NGC 2439 NGC 6342 NGC 6603 NGC 5822 NGC 1806 NGC 6834 NGC 6819 NGC 6139 NGC 2257 NGC 1893 NGC 2354 NGC 6256 NGC 6755 NGC 6871 NGC 2040 NGC 366 NGC 6229 dukarichthwolkephimetimkhxngiflnikhxmulekiywkbphaph phaphnimikhxmulephimetim sungswnihymacakklxngdicitxlhruxsaeknenxrthisamarthekbkhxmuldngklawiwrwmkbphaphid thaphaphnithukprbprungaekikhhruxepliynaeplngcakedim khxmulbangxyangcayngkhngimepliynaeplngehmuxnphaphthithukprbprungaekikhnnkarcdwangphaphpktikhwamlaexiydaenwnxn400 dpikhwamlaexiydaenwtng400 dpisxftaewrthiichAdobe Photoshop CS Windowsaekikhphaphlasud16 40 6 mkrakhm 2548sepssiimidprbethiybkhwamkwangkhxngphaph6 555 phikeslkhwamsungkhxngphaph6 995 phikeslewlathiaeplngepndicithl11 40 6 mkrakhm 2548wnthiaekikhkhxmulemtalasud11 40 6 mkrakhm 2548run IIM2 ekhathungcak https th wikipedia org wiki ifl NGC 346 in Small magellanic cloud jpg, wikipedia, วิกิ หนังสือ, หนังสือ, ห้องสมุด,
