您现在的位置是:綜合 >>正文
【】
綜合753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.
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.
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
The U.S. will no longer have the final say on internet domain names
綜合The National Telecommunications Information Admistration (NTIA) announced via 。 blog post。on Tuesday ...
【綜合】
阅读更多曼聯有意22歲烏拉圭妖鋒 本菲卡曾拒5000萬歐報價
綜合曼聯有意22歲烏拉圭妖鋒 本菲卡曾拒5000萬歐報價_努涅斯_達爾文_尤文圖斯www.ty42.com 日期:2022-02-12 10:31:00| 評論(已有330426條評論) ...
【綜合】
阅读更多曝另有一位英超球星因毆打女友被捕 花錢庭外和解
綜合曝另有一位英超球星因毆打女友被捕 花錢庭外和解_球員_格林伍德_虐待www.ty42.com 日期:2022-02-13 12:01:00| 評論(已有330611條評論) ...
【綜合】
阅读更多