by APOD Robot » Wed Jul 22, 2020 4:07 am
The Structured Tails of Comet NEOWISE
Explanation: What is creating the structure in Comet NEOWISE's tails? Of the
two tails evident, the blue ion tail on the left points directly away from the Sun and is pushed out by the flowing and charged solar wind. Structure in the
ion tail comes from different rates of expelled blue-glowing ions from the comet's nucleus, as well as the always complex and continually changing structure of our
Sun's wind. Most unusual for
Comet C/2020 F3 (NEOWISE), though, is the wavy structure of its
dust tail. This dust
tail is pushed out by sunlight, but curves as heavier
dust particles are better able to resist this light pressure and continue along a solar orbit.
Comet NEOWISE's impressive dust-tail striations are
not fully understood, as yet, but likely related to
rotating streams of sun-reflecting grit liberated by ice melting on its
5-kilometer wide nucleus. The featured 40-image conglomerate,
digitally enhanced, was captured three days ago through the dark skies of the
Gobi Desert in
Inner Mongolia,
China.
Comet NEOWISE will make it
closest pass to the Earth tomorrow as it moves out from the Sun.
The comet, already fading but
still visible to the unaided eye, should fade more rapidly as it recedes from the Earth.
[url=https://apod.nasa.gov/apod/ap200722.html] [img]https://apod.nasa.gov/apod/calendar/S_200722.jpg[/img] [size=150]The Structured Tails of Comet NEOWISE[/size][/url]
[b] Explanation: [/b] What is creating the structure in Comet NEOWISE's tails? Of the [url=https://www.forbes.com/sites/startswithabang/2020/07/16/why-does-comet-neowise-have-two-tails/#6741a7ec2488]two tails[/url] evident, the blue ion tail on the left points directly away from the Sun and is pushed out by the flowing and charged solar wind. Structure in the [url=https://apod.nasa.gov/apod/ap170425.html]ion tail[/url] comes from different rates of expelled blue-glowing ions from the comet's nucleus, as well as the always complex and continually changing structure of our [url=https://apod.nasa.gov/apod/ap000318.html]Sun's wind[/url]. Most unusual for [url=https://en.wikipedia.org/wiki/C/2020_F3_(NEOWISE)]Comet C/2020 F3 (NEOWISE)[/url], though, is the wavy structure of its [url=https://en.wikipedia.org/wiki/Comet#/media/File:Cometorbit01.svg]dust tail[/url]. This dust [url=https://spaceplace.nasa.gov/comet-stick/en/]tail[/url] is pushed out by sunlight, but curves as heavier [url=https://apod.nasa.gov/apod/ap010813.html]dust particle[/url]s are better able to resist this light pressure and continue along a solar orbit. [url=https://www.syfy.com/syfywire/comet-neowise-goes-from-red-to-green-and-has-spiral-arms]Comet NEOWISE[/url]'s impressive dust-tail striations are [url=https://image.shutterstock.com/image-photo/closeup-pug-emotion-on-yellow-260nw-482089210.jpg]not fully understood[/url], as yet, but likely related to [url=https://apod.nasa.gov/apod/ap960414.html]rotating streams[/url] of sun-reflecting grit liberated by ice melting on its [url=https://apod.nasa.gov/apod/ap200712.html]5-kilometer wide nucleus[/url]. The featured 40-image conglomerate, [url=https://www.oxfamblogs.org/fp2p/wp-content/uploads/1954_c641.jpg]digitally enhanced[/url], was captured three days ago through the dark skies of the [url=https://www.youtube.com/watch?v=Ntx9XSOQzOI]Gobi Desert[/url] in [url=https://en.wikipedia.org/wiki/Inner_Mongolia]Inner Mongolia[/url], [url=https://en.wikipedia.org/wiki/China]China[/url]. [url=https://apod.nasa.gov/apod/ap200714.html]Comet NEOWISE[/url] will make it [url=https://earthobservatory.nasa.gov/images/146996/comet-neowise-brightens-the-night]closest pass to the Earth tomorrow[/url] as it moves out from the Sun. [url=https://youtu.be/FFn4-kQPjzk]The comet[/url], already fading but [url=https://www.nasa.gov/feature/how-to-see-comet-neowise]still visible[/url] to the unaided eye, should fade more rapidly as it recedes from the Earth.
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