APOD: A Luminous Night (2014 Aug 09)

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APOD Robot
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APOD: A Luminous Night (2014 Aug 09)

Post by APOD Robot » Sat Aug 09, 2014 4:05 am

Image A Luminous Night

Explanation: What shines in the world at night? Just visible to the eye, a rare electric blue glow spread along the shores of Victoria Lake on January 16, 2013. Against reflections of a light near the horizon, this digitally stacked long exposure recorded the bioluminescence of noctiluca scintillans, plankton stimulated by the lapping waves. Above, the night skies of the Gippsland Lakes region, Victoria, Australia shine with a fainter greenish airglow. Oxygen atoms in the upper atmosphere, initially excited by ultraviolet sunlight, produce the more widely seen fading atmospheric chemiluminescence. Washed out by the Earth's rotation, the faint band of the southern summer Milky Way stretches from the horizon as star trails circle the South Celestial Pole.

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Starbuck

Re: APOD: A Luminous Night (2014 Aug 09)

Post by Starbuck » Sat Aug 09, 2014 6:42 am

As a biologist, genus names take a capital letter, so Noctiluca scintillans. Should also be italicised, so Noctiluca scintillans. Apart from that - great photograph!

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Beyond
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Re: APOD: A Luminous Night (2014 Aug 09)

Post by Beyond » Sat Aug 09, 2014 7:59 am

Noctiluca scintillans
To find the Truth, you must go Beyond.

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Ann
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Re: APOD: A Luminous Night (2014 Aug 09)

Post by Ann » Sat Aug 09, 2014 8:27 am

This photo brings back memories from 1972. I and a bunch of kid were out rowing off the coast of Göteborg. It was a warm night in August, it was dark but the Moon was shining, and whenever the oars were dipped in the water there was an absolute riot of sparkling lights. We jumped into the water and swam in the glittering water, and sparkling lights were streaming off our wet bodies.

Thanks for the memories! :D

Ann
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starsurfer
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Re: APOD: A Luminous Night (2014 Aug 09)

Post by starsurfer » Sat Aug 09, 2014 2:49 pm

I would love to watch the starry sky together with my future soulmate! :D

owleye1

Re: APOD: A Luminous Night (2014 Aug 09)

Post by owleye1 » Sat Aug 09, 2014 3:44 pm

Not only is green airglow visible, but also red. While green seems to be the most common oxygen emmision, and is often visible to the naked eye when banded, the red appears only in time-exposure photography. I once imaged all-sky red airglow that showed very brightly in the photos, and even thought it was banded, was conpletely invisible to the naked eye - and this from a VERY dark rural location.

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Re: APOD: A Luminous Night (2014 Aug 09)

Post by Boomer12k » Sat Aug 09, 2014 7:39 pm

Interesting...

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starsurfer
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Re: APOD: A Luminous Night (2014 Aug 09)

Post by starsurfer » Sun Aug 10, 2014 5:29 pm

Also there hasn't been an image of a planetary nebula for a while. :( :cry:

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Re: APOD: A Luminous Night (2014 Aug 09)

Post by geckzilla » Sun Aug 10, 2014 5:56 pm

starsurfer wrote:Also there hasn't been an image of a planetary nebula for a while. :( :cry:
Don't fret. :wink:
Just call me "geck" because "zilla" is like a last name.

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Re: APOD: A Luminous Night (2014 Aug 09)

Post by starsurfer » Mon Aug 11, 2014 6:25 am

geckzilla wrote:
starsurfer wrote:Also there hasn't been an image of a planetary nebula for a while. :( :cry:
Don't fret. :wink:
Moi fret? You seem to have me confused with someone else!
Thankfully I can get my PN fix from any particular galleries and also recent scientific papers!
They make me so happy!
In fact I think I could hug you!