APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

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APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by APOD Robot » Tue Oct 30, 2018 4:08 am

Image Orionids Meteors over Inner Mongolia

Explanation: Meteors have been shooting out from the constellation of Orion. This was expected, as October is the time of year for the Orionids Meteor Shower. Pictured here, over two dozen meteors were caught in successively added exposures last October over Wulan Hada volcano in Inner Mongolia, China. The featured image shows multiple meteor streaks that can all be connected to a single small region on the sky called the radiant, here visible just above and to the left of the belt of Orion, The Orionids meteors started as sand sized bits expelled from Comet Halley during one of its trips to the inner Solar System. Comet Halley is actually responsible for two known meteor showers, the other known as the Eta Aquarids and visible every May. An Orionids image featured on APOD one year ago today from the same location shows the same car. Next month, the Leonids Meteor Shower from Comet Tempel-Tuttle should also result in some bright meteor streaks.

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neufer
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Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by neufer » Tue Oct 30, 2018 1:11 pm

  • OMG :!: Is the Orionids Meteor Mongolian Caravan bringing in Cyanogen :?:
https://en.wikipedia.org/wiki/Halley%27s_Comet#History wrote:
<<The 1910 approach [of Halley's Comet], which came into naked-eye view around 10 April and came to perihelion on 20 April, was notable for several reasons: it was the first approach of which photographs exist, and the first for which spectroscopic data were obtained. Furthermore, the comet made a relatively close approach of 0.15 AU, making it a spectacular sight. Indeed, on 19 May, Earth actually passed through the tail of the comet. One of the substances discovered in the tail by spectroscopic analysis was the toxic gas cyanogen, which led astronomer Camille Flammarion to claim that, when Earth passed through the tail, the gas "would impregnate the atmosphere and possibly snuff out all life on the planet." His pronouncement led to panicked buying of gas masks and quack "anti-comet pills" and "anti-comet umbrellas" by the public. In reality, as other astronomers were quick to point out, the gas is so diffuse that the world suffered no ill effects from the passage through the tail.

The comet added to the unrest in China on the eve of the Xinhai Revolution that would end the last dynasty in 1911. As James Hutson, a missionary in Sichuan Province at the time, recorded, "The people believe that it indicates calamity such as war, fire, pestilence, and a change of dynasty. In some places on certain days the doors were unopened for half a day, no water was carried and many did not even drink water as it was rumoured that pestilential vapour was being poured down upon the earth from the comet.">>
Art Neuendorffer

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Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by heehaw » Tue Oct 30, 2018 2:09 pm

Oh, oh, oh, what a strikingly lovely picture of the sky! How I appreciate getting these wonderful images from APOD!

danh

Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by danh » Tue Oct 30, 2018 5:54 pm

Your picture of the Orionids appeared in the NASA Astronomy Picture of the Day (APOD) on October 30, 2018.  Congratulations on the recognition of your beautiful shot.  It is quite a treat to sit here in San Diego in the most Southwestern point of the United States and view your picture from deep in Northern China.

Thank you for sharing your expertise and labor with all of us.

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Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by saturno2 » Tue Oct 30, 2018 6:26 pm

Beautiful image

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Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by pferkul » Tue Oct 30, 2018 6:55 pm

Here are the extended paths to show the apparent radiant.
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Re: APOD: Orionids Meteors over Inner Mongolia (2018 Oct 30)

Post by Fred the Cat » Tue Oct 30, 2018 11:46 pm

It's not easy being green! :mrgreen: Makes you wonder if comet dust, high in cyanogen, would burn brighter as it enters our oxygen atmosphere given that it produces high temperature :?:

"..it was discovered that cyanogen (C2N2) burning in an equimolar amount of pure oxygen gives very high temperatures."
Freddy's Felicity "Only ascertain as a cat box survivor"