您现在的位置是:綜合 >>正文
【】
綜合5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
Dog elected for third term as mayor of Minnesota town
綜合Hopefully he has a human chief of staff.。Duke the Great Pyrenees is the only dog that's ever been el ...
【綜合】
阅读更多Kid has the perfect response when asked why he brought a dead squirrel to school
綜合You can always count on kids doing some seriously weird stuff.Layde Hobson was excited to receive a ...
【綜合】
阅读更多Chrissy Teigen defends Kim Kardashian and explains the weirdness of fame
綜合Celebrity culture is a weird phenomenon that Chrissy Teigen knows all too well. The model and cook b ...
【綜合】
阅读更多
热门文章
- Australian football makes history with first LGBT Pride Game
- India's space agency launches 8 satellites into 2 orbits
- Sia announces deluxe edition of 'This Is Acting'
- LG V20 to start shipping in Korea this week
- Darth Vader is back. Why do we still care?
- How to check if you've been the victim of a breach like the Yahoo hack
最新文章
Dog elected for third term as mayor of Minnesota town
Chanel debuts futuristic helmets in Paris fashion week
A very big
Lupita Nyong'o unveils her rap alter ego to her Instagram fans
This app is giving streaming TV news a second try
All the hosts are leaving 'Great British Bake Off' but Americans should still watch