时间:2026-04-07 20:48:37 来源:网络整理编辑:綜合
Hubble's latest image share is a good one for fans of cosmic razzle-dazzle.You're seeing NGC 6717, a
Hubble's latest image share is a good one for fans of cosmic razzle-dazzle.
You're seeing NGC 6717, a globular cluster that forms a piece of the constellation Sagittarius. But where it appears to you, a person on the ground staring up at the sky, as a pinprick of light amidst other pinpricks of light, to Hubble it's something much more magnificent.
Not every point of light you see here is part of the globular cluster, but it's all gorgeous.Credit: ESA/Hubble and NASA, A. SarajediA globular cluster is like a little miniature galaxy. It's a collection of stars, sometimes numbering in the thousands, that are gathered together in a roughly spherical formation. They're held together by immense gravitational forces that often make a cluster's central region more densely packed.
This particular image is a beautiful yet imperfect look at NGC 6717. While most of the points of light you see are part of the cluster, the brightest spots in the center of the image are stars that sit directly between NGC 6717 and Hubble's view of it from Earth's orbit.
iRobot Roomba j7+ (7550) Self-Emptying Robot Vacuum—$599.00
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)
You can tell which ones are in the way by their distinctive diffraction spikes (i.e. the long jets of light criss-crossing some of the stars). These spikes form, NASA notes, when the light released by each star "interacts with the structures supporting Hubble’s secondary mirror."
SEE ALSO:NASA scientists spot troubling, extreme melting in Greenland from a planeCapturing an image of NGC 6717 is complicated by the fact that the Sagittarius constellation sits in the same region of the sky as the center of our galaxy, the Milky Way. The galaxy's center is filled with "light-absorbing dust and gas" that makes capturing this globular cluster more challenging.
If you've seen our looks at other Hubble images, you've definitely read about its Wide Field Camera 3, which was added to the orbital telescope decades into its life, in 2009. This look at NGC 6717 is a composite of imagery captured by WFC3 as well as Hubble's Advanced Camera for Surveys, a 2002 upgrade that looks at visible and red wavelengths in large stretches of sky.
The U.S. will no longer have the final say on internet domain names2026-04-07 20:42
免簽大法好 !巴薩已預定凱西今夏加盟 年薪800萬歐2026-04-07 20:30
還想演 ?登貝萊仍宣稱胃疼 但被巴薩強製要求訓練2026-04-07 20:28
李可 :傷病問題已經解決 正在阿森納進行康複治療2026-04-07 19:57
Cat gets stuck in the most awkward position ever2026-04-07 19:54
嘴炮王者?哈維上任後換湯不換藥 戰績沒比科曼好2026-04-07 19:52
洛國富公開道歉 :沒了解事情經過發表了衝動言論 向足協說聲對不起2026-04-07 19:18
李霄鵬回懟日媒:歸化球員跨越萬裏展示了對國足的熱愛2026-04-07 18:22
Olympic security asks female Iranian fan to drop protest sign2026-04-07 18:18
C羅的未來又被堵死一路?老東家遭歐戰禁賽三賽季2026-04-07 18:11
Richard Branson 'thought he was going to die' in bike accident2026-04-07 20:45
媒體人:國家隊管理層表示理解洛國富 有機會再召費南多2026-04-07 20:24
國足助教 :感謝中國足協的信任 這是巨大的榮耀2026-04-07 20:22
巴黎欲挖薩拉赫接替姆巴佩 皇馬巴薩切爾西亦有意2026-04-07 20:02
Tributes flow after death of former Singapore president S.R. Nathan2026-04-07 20:02
股改進度決定申花未來動作 博拉尼奧斯暫時走不了2026-04-07 19:31
媒體人 :國家隊管理層表示理解洛國富 有機會再召費南多2026-04-07 18:53
中國足協:對山東泰山表示由衷感謝 祝福郭田雨海外生涯順利2026-04-07 18:49
Snapchat is about to explode in popularity, report says2026-04-07 18:32
意大利隊大名單:巴神時隔三年再入選 錢多多缺席2026-04-07 18:30