您现在的位置是:綜合 >>正文
【】
綜合6286人已围观
简介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.

A 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.
Prime Day deals you can shop right now
Products available for purchase here through affiliate links are selected by our merchandising team. If you buy something through links on our site, Mashable may earn an affiliate commission.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.
Tags:
转载:欢迎各位朋友分享到网络,但转载请说明文章出处“夫榮妻貴網”。http://new.maomao321.com/news/35d51899446.html
相关文章
Dressage horse dancing to 'Smooth' by Santana wins gold for chillest horse
綜合Okay forget everyone else -- this horse named Lorenzo is our favorite Olympic athlete now.。Lorenzo, ...
【綜合】
阅读更多新華社:國足有望從客場帶走勝利 期待12強賽體麵收官
綜合新華社 :國足有望從客場帶走勝利 期待12強賽體麵收官_比賽_阿曼隊_李霄鵬www.ty42.com 日期:2022-03-29 08:01:00| 評論(已有338077條評論) ...
【綜合】
阅读更多曝巴甲巴伊亞俱樂部有意引進洛國富 已與球員開始接觸
綜合曝巴甲巴伊亞俱樂部有意引進洛國富 已與球員開始接觸_比賽_效力_中國www.ty42.com 日期:2022-03-29 11:31:00| 評論(已有338143條評論) ...
【綜合】
阅读更多