Starship Asterisk*

[float=left][youtube]https://www.youtube.com/watch?v=jMTT0LW0M_Y[/youtube][/float][quote="Chris Peterson" post_id=316277 time=1630361722 user_id=117706]
[quote=heehaw post_id=316276 time=1630361580]


It is nice to have ONE planet where we can get close-ups![/quote]

I think it's fair to say that, at the moment, we have two (although with less geographical coverage on one of those).[/quote]

[quote=heehaw post_id=316276 time=1630361580]
It is nice to have ONE planet where we can get close-ups!
[/quote]

I think it's fair to say that, at the moment, we have two (although with less geographical coverage on one of those).

It is nice to have ONE planet where we can get close-ups!

[quote=Ann post_id=316251 time=1630301881 user_id=129702]
[float=left][img3="A Fire Rainbow over West Virginia. Image Credit: Christa Harbig"]https://apod.nasa.gov/apod/image/2108/FireRainbow_Harbig_960.jpg[/img3][/float]

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Amazing! It looks like the sky is ablaze with a wildfire of color!

Ann
[/quote]

I fully concur ...

[youtube]https://www.youtube.com/watch?v=dm1p9mE9RBw[/youtube]

As Riker says in Star Trek, but due to something quite else.

:D

Of course all that is true! pass the ice cold one.

[quote=FrankTKO post_id=316256 time=1630325743 user_id=160]

I'm not sure I understand the phrase "the Sun must be at least 58 degrees high in a sky where cirrus clouds present below"...

Was the photographer looking up at the sky or was he on a mountain looking level or down?[/quote]
[c]Looking up at the cirrus.
http://www.atoptics.co.uk/halo/chaform.htm
http://www.atoptics.co.uk/halo/cha2.htm
http://asterisk.apod.com/viewtopic.php?f=9&t=39454&p=292373#p292326[/c]

[attachment=1]FireRainbow_Harbig_960.jpg[/attachment]
Exactly what I was thinking Ann! The Sky is burning; Aka Henny Penny
The sky is falling! I never knew this phenom existed! 8-)

[attachment=0]8121c0291fa14d1fe52b9eb007741cac.jpg[/attachment]
Kitty thinks it's amazing also

I'm not sure I understand the phrase "the Sun must be at least 58 degrees high in a sky where cirrus clouds present below"...

Was the photographer looking up at the sky or was he on a mountain looking level or down?

[float=left][img3="A Fire Rainbow over West Virginia. Image Credit: Christa Harbig"]https://apod.nasa.gov/apod/image/2108/FireRainbow_Harbig_960.jpg[/img3][/float]

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Amazing! It looks like the sky is ablaze with a wildfire of color!

Ann

[url=https://apod.nasa.gov/apod/ap210830.html] [img]https://apod.nasa.gov/apod/calendar/S_210830.jpg[/img] [size=150]A Fire Rainbow over West Virginia[/size][/url]

[b] Explanation: [/b] What's happening to this cloud? Ice crystals in a distant cirrus cloud are acting like little floating [url=http://micro.magnet.fsu.edu/primer/java/scienceopticsu/newton/]prisms[/url]. Known informally as a fire rainbow for its flame-like appearance, a [url=https://en.wikipedia.org/wiki/Circumhorizon_arc]circumhorizon arc[/url] appears parallel to the horizon. For a [url=https://www.atoptics.co.uk/halo/cha2.htm]circumhorizontal arc[/url] to be visible, [url=https://solarsystem.nasa.gov/solar-system/sun/overview/]the Sun[/url] must be at least 58 degrees high in a sky where [url=https://en.wikipedia.org/wiki/Cirrus_cloud]cirrus clouds[/url] present below -- in this case [url=https://www.colweather.org.uk/gal-clouds-cirrus.php#Cirrus%20fibratus]cirrus fibrates[/url]. The numerous, flat, [url=http://www.atoptics.co.uk/halo/orplate.htm]hexagonal ice-crystals[/url] that compose the [url=https://en.wikipedia.org/wiki/Cirrus_cloud]cirrus cloud[/url] must be [url=https://www.atoptics.co.uk/halo/platcol.htm]aligned horizontally[/url] to properly [url=http://youtube.com/watch?v=U98KPM2b9IA]refract sunlight[/url] in a collectively similar manner. Therefore, [url=https://apod.nasa.gov/apod/ap190519.html]circumhorizontal[/url] [url=https://apod.nasa.gov/apod/ap151215.html]arcs[/url] are [url=https://i.pinimg.com/550x/81/21/c0/8121c0291fa14d1fe52b9eb007741cac.jpg]somewhat unusual[/url] to see. The [url=https://www.facebook.com/photo?fbid=4794142133932422]featured fire rainbow[/url] was photographed earlier this month near [url=https://youtu.be/kROh8JwKnOk]North Fork Mountain[/url] in [url=https://en.wikipedia.org/wiki/West_Virginia]West Virginia[/url], [url=https://en.wikipedia.org/wiki/United_States]USA[/url].


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