APOD: Planet Aurora (2017 May 13)

Comments and questions about the APOD on the main view screen.
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APOD Robot
Otto Posterman
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APOD: Planet Aurora (2017 May 13)

Postby APOD Robot » Sat May 13, 2017 4:14 am

Image Planet Aurora

Explanation: What bizarre alien planet is this? It's planet Earth of course, seen from the International Space Station through the shimmering glow of aurorae. About 400 kilometers (250 miles) above Earth, the orbiting station is itself within the upper realm of the auroral displays. Aurorae have the signature colors of excited molecules and atoms at the low densities found at extreme altitudes. Emission from atomic oxygen dominates this view. The eerie glow is green at lower altitudes, but a rarer reddish band extends above the space station's horizon. Also visible from the planet's surface, this auroral display began during a geomagnetic storm. The storm was triggered after a coronal mass ejection impacted Earth's magnetosphere in June of 2015.

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Boomer12k
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Re: APOD: Planet Aurora (2017 May 13)

Postby Boomer12k » Sat May 13, 2017 6:57 am

These are always so cool... too bad the view is not bigger...

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heehaw

Re: APOD: Planet Aurora (2017 May 13)

Postby heehaw » Sat May 13, 2017 9:36 am

If you were a colonist on Mars, you would have to go underground to save your life every time something like this occurred!

heehaw

Re: APOD: Planet Aurora (2017 May 13)

Postby heehaw » Sat May 13, 2017 9:41 am

Off topic: by the way - the public ALL (in my experience) know the Pythagorean Theorem , and they know what it MEANS too! Also, they all know that E=mc^2, and while they know what it means in practical terms, what they don't know is that it results from a simple extension of that same Pythagorean Theorem: http://henry.pha.jhu.edu/ritamahon.pdf (All that is needed is high-school algebra!)

BDanielMayfield
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Re: APOD: Planet Aurora (2017 May 13)

Postby BDanielMayfield » Sat May 13, 2017 1:04 pm

heehaw wrote:Off topic: by the way - the public ALL (in my experience) know the Pythagorean Theorem , and they know what it MEANS too! Also, they all know that E=mc^2, and while they know what it means in practical terms, what they don't know is that it results from a simple extension of that same Pythagorean Theorem: http://henry.pha.jhu.edu/ritamahon.pdf (All that is needed is high-school algebra!)

Thanks for sharing that.

Bruce
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gmPhil
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Re: APOD: Planet Aurora (2017 May 13)

Postby gmPhil » Sat May 13, 2017 6:34 pm

[E=mc2] results from a simple extension of that same Pythagorean Theorem

hmm... it's also an extension of 1+1=2, but I digress... what I came to say, re the main picture, was... those bloody seflie-sticks get everywhere!!


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