时间:2024-09-20 08:12:43 来源:网络整理编辑:綜合
When is a quasar not just a quasar? When it's four (technically, five) views of the same quasar, of
When is a quasar not just a quasar? When it's four (technically, five) views of the same quasar, of course.
Our latest Hubble image drop from NASA is a real treat. See that big shiny pool of light in the center? The one with the halo around it, and four pinpricks of light in the halo? That whole, beautiful mess is an optical illusion that's a product of Earth's specific position in the cosmos and the way light travels, and bends, through space.
Hubble's eyes are playing tricks on you.Credit: ESA/Hubble & NASA, T. Treu Acknowledgment: J. SchmidtLet's pull this apart. The bright center of that halo is, if you look closely, actually two bright spots that appear so close together they almost look like one. They're two galaxies, and they only look like they're bumping into each other because of our perspective from Earth.
The two galaxies, which NASA doesn't identify, are also in the foreground of this image (aka they're closer to Earth than the quasar). That's the key to this illusion. Galaxies are extremely large celestial bodies that are held together by immense gravitational forces. When light passes through these areas, its path is warped by that pull. It's a phenomenon called gravitational lensing.
iRobot Roomba Combo j7+ Self-Emptying Robot Vacuum and Mop—$698.99(List Price $1099.99)
Samsung Galaxy Tab A9+ 10.9" 64GB Wi-Fi Tablet—$142.49(List Price $219.99)
Apple AirPods Pro 2nd Gen With MagSafe USB-C Charging Case—$168.99(List Price $249.00)
Fitbit Charge 6 Fitness Tracker With 6-Months Membership—$99.95(List Price $159.95)
Apple Watch Series 9 (GPS, 41mm, Midnight, S/M, Sports Band)—$279.99(List Price $399.00)
Light traveling through space is how we see any of the space objects in the above image. So when the warped fabric of space distorts that light, it can produce some unusual effects.
A more zoomed in look at our trio of celestial bodies and the optical illusion they create.Credit: ESA/HUBBLE & NASA, T. TREU ACKNOWLEDGMENT: J. SCHMIDT / cropping by mashableIn this case, gravitational lensing caused by the two foreground galaxies creates extra, illusory pinpricks of light in the final image. The four spots of light in the halo are all the same, single quasar, just magnified and bent around the gravitational exertions of the two galaxies. There's also a fifth point, according to NASA, right in the dead center of that mass, that's also another view of the same quasar.
SEE ALSO:NASA scientists spot troubling, extreme melting in Greenland from a plane(A quasar, short for "quasi-stellar radio source," is an extremely distant and bright young galaxy. They're more numerous at the edges of our visible universe.)
This image, like so many of Hubble's best, is brought to use by Wide Field Camera 3, which was installed in 2009. The aging orbital telescope will soon have some younger, more technologically advanced company in orbit, when NASA launches the James Webb Space Telescope in October.
Olympics official on Rio's green diving pool: 'Chemistry is not an exact science'2024-09-20 07:57
郵報 :滕哈特正在學習英語 願在今夏前往曼聯執教2024-09-20 07:47
官方 :廣州城外援蒂亞戈加盟J2聯賽球隊千葉市原2024-09-20 07:27
球員30歲後進球榜:C羅霸榜梅西第4 唯萊萬場均1球2024-09-20 07:26
Olympics official on Rio's green diving pool: 'Chemistry is not an exact science'2024-09-20 07:25
2.0版歐超文件泄露:廢除永久會員製 譴責歐足聯2024-09-20 07:13
萊比錫CEO談歐戰獎金:要我們捐款的人 請自己先捐2024-09-20 06:48
國足海口重啟集訓 或熱身長春亞泰與U23國足2024-09-20 06:00
This 'sh*tpost' bot makes terrible memes so you don't have to2024-09-20 05:51
曼聯選帥曝出一意外人選 弗格森鼎力舉薦安切洛蒂2024-09-20 05:48
Olympic security asks female Iranian fan to drop protest sign2024-09-20 07:50
官方:廣州城外援蒂亞戈加盟J2聯賽球隊千葉市原2024-09-20 07:42
久巴 :反對雙標 !體育無關政治?俄羅斯為何不適用2024-09-20 07:13
曝歐超12強僅1隊真正決定退出 西媒:是國米叛變2024-09-20 06:54
Felix the cat just raised £5000 for charity because she's the hero we all need2024-09-20 06:48
李磊:路還很長 困難的時候也別忘了抬起頭向前看2024-09-20 06:12
俄羅斯媒體:俄羅斯可加入亞足聯 在亞洲不受抵製2024-09-20 06:06
名嘴:阿布該被譴責而非讚美 切爾西該被逐出前四2024-09-20 06:04
17 questions you can answer if you're a good communicator2024-09-20 06:03
韓女足獲亞洲杯亞軍 韓國足協發放4.6億韓元獎金2024-09-20 05:58