File:CometC2020F3-Neowise-20200716.png

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摘要

描述CometC2020F3-Neowise-20200716.png	English: Aug. 21, 2020 Hubble Snaps Close-Up of Celebrity Comet NEOWISE https://www.nasa.gov/feature/goddard/2020/hubble-snaps-close-up-of-celebrity-comet-neowise This image of comet C/2020 F3 (NEOWISE) was taken by the Hubble Space Telescope on Aug. 8, 2020. Hubble’s image represents the first time a comet of this brightness has been photographed at such resolution after this close of a pass by the Sun. The two structures appearing on the left and right sides of the comet’s center are jets made up of ice sublimating from beneath the surface of the nucleus, with the resulting dust and gas being squeezed through at a high velocity. The jets emerge as cone-like structures, then are fanned out by the rotation of comet NEOWISE’s nucleus.
日期	2020年7月16日
来源	https://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p2045c-f-512x512.png
作者	NASA, ESA, A. Pagan (STScI), and Q. Zhang (Caltech)

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	日期/时间	缩⁠略⁠图	大小	用户	备注
当前	2020年8月21日 (五) 20:30		512 × 512（1.19 MB）	Drbogdan	Uploaded a work by NASA, ESA, A. Pagan (STScI), and Q. Zhang (Caltech) from https://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p2045c-f-512x512.png with UploadWizard

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以下页面使用本文件：

C/2020 F3

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el.wikipedia.org上的用途
- C/2020 F3
en.wikipedia.org上的用途
- Comet NEOWISE

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标签	Green
来源	STScI
提供者	NASA, ESA, STScI, Q. Zhang and Z. Levay
图像内容提要	Whether it’s a surprise asteroid, colorful aurora or a heart-stopping eclipse, the landscape of the night sky is constantly changing. When a new visitor appears in view, it’s guaranteed to grab the attention of professional astronomers and casual sky gazers alike. Well, consider the Hubble Space Telescope the paparazzi of the sky, as it’s managed to snap the closest images yet of the sky’s latest visitor to make headlines, comet C/2020 F3 (NEOWISE), after it passed by the Sun. Comet NEOWISE is considered the brightest visible from the Northern Hemisphere since 1997’s Hale-Bopp. It’s estimated to be traveling at a whopping 40 miles per second, or 144,000 miles per hour. The comet’s closest approach to the Sun took place on July 3 and it’s now heading back to the outer parts of the solar system, not to pass through again for another 7,000 years or so.
作者	Space Telescope Science Institute Office of Public Outreach
简短标题	Comet NEOWISE
著作权持有人	Copyright© 2020 by Zoltan G. Levay
图像标题	The Hubble images of comet NEOWISE, taken on August 8, zero in on the visitor’s coma, the gossamer shell that surrounds its nucleus, and its dusty output. This is the first time a comet of this brightness has been photographed at such resolution after this close of a pass by the Sun – past attempts proved unsuccessful after those comets disintegrated in the searing heat.“Hubble has far better resolution than we can get with any other telescope of this comet,” said lead researcher Qicheng Zhang of the California Institute of Technology in Pasadena, California. “That resolution is very key in getting an image very close to the nucleus. It lets us see changes inthe dust right after it’s stripped from that nucleus due to solar heat, sampling dust as close to the original properties of the comet as possible.”The heart of the comet, its icy nucleus, is too small to be seen by Hubble. The ball of ice may be no more than 3 miles (4.8 kilometers) across. Instead, the Hubble image captures a portion of the vast cloud of gas and dust enveloping the nucleus, which measures about 6,800 miles (11,000 kilometers) across in this photo.The Hubble photos may help reveal the color of the comet’s dust and how those colors change as the comet moves away from the sun. This, in turn, may explain how solar heat affects the contents and structure of that dust and the comet’s coma. The ultimate goal here would be to learn the original properties of the dust.Researchers are currently delving more into the data to see what they’re able to confirm.NASA’s Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission first discovered its namesake comet in March 2020. As the comet made its way closer to the Sun, searing heat melted its ices, unleashing dust and gas that leaves the signature tails. Throughout the summer, ground-based skywatchers in the Northern Hemisphere were able to catch a view of the traveler moving across the sky.
使用条款	-{R\|http://hubblesite.org/copyright/}-
数据生成日期时间	2020年8月17日 (星期一)
宽度	512 px
高度	512 px
像素构成	RGB
色彩组分数	3
水平分辨率	72 dpi
垂直分辨率	72 dpi
Exif版本	2.31
色彩空间	未标定
图像宽度	512 px
图像高度	512 px
每色彩组分位数	16 16 16
使用软件	The ESA/ESO/NASA FITS Liberator
数字化日期时间	2020年7月16日 (四) 18:37
文件修改日期时间	2020年8月17日 (一) 16:52
元数据最后修改日期	2020年8月17日 (一) 17:43
原始文件唯一ID	xmp.did:ed378c29-90b4-4947-8518-514f0ffe318c
著作权状况	受著作权保护
关键词	Comet C/2020 F3 NEOWISE
联系信息	outreach@stsci.edu -{R\|http://hubblesite.org}- 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444

File:CometC2020F3-Neowise-20200716.png

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