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back to article Hubble snaps mystery green death nebula in NGC 1846

NASA's Hubble Space Telescope has captured an image of the death of a star in a nearby dwarf galaxy. Death of a star in the Globular Cluster NGC 1846 Hubble snapped the shot of the cumbersomely named Globular Cluster NGC 1846, a collection of hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud, in …

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Bronze badge
WTF?

But why is it green?

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Happy

The death of...

...Krypton.

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Boffin

Green...

...Remember it's false colour, so it may not actually *be* green ("colour" is somewhat hard to define in astronomy other than by wavelength of light). The light received may well be green if it's from [OIII] (forbidden Oxygen III transition) which is fairly common in planetary nebulae. (OK - it's more of a teal-type colour, but close enough).

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Anonymous Coward

Terraforming replicators. Go read 'Absolution Gap' (or the whole Revelation Space series if you've not yet done so).

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Silver badge

False color?

Is it? I didn't see any mention either here or on space.com that it was false color. Doing a little more searching, I found a page stating "the cluster was observed in filters that isolate blue, green, and infrared starlight". So presumably that would mean the green is really green, and only the red channel is "false" (actually infrared).

http://hubblesite.org/newscenter/archive/releases/2011/35/image/b/

Does that count as false color? I'm not sure, maybe stretching-the-truth color.

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jai
Silver badge

You'd prefer another target? A military target? Then name the system!

That's no moon....

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Anonymous Coward

We are DOOMED

AIEE the moties are coming, The moties are coming!!!!!!

Where is Crazy Eddie??

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Green

There are a few stars that look green(ish); the colour largely reflects temperature and there are many blue and red stars, not to mention yellow (in most cases its easier to see the colours in a telescope).

Note that colour is only partly correlated with age - some stars start off red and then just fade away

(providing a fine example to M. Hucknell).

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Silver badge
Childcatcher

Blackbody Spectrum

The blackbody spectrum doesn't pass through green, so any green tinge to a star would be from the absorption or emission spectra of elements in the star's outer layers.

Either way this is a nebula.

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Silver badge

in a nearby dwarf galaxy...

right next door, really, only 160,000 light years away...

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IT Angle

If it is a cluster member,

what's the failover mode?

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Coat

"in a nearby dwarf galaxy"

So that's where they come from..

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Boffin

Green explained?

See here:

http://en.wikipedia.org/wiki/Galaxy_color-magnitude_diagram

there's a green valley between the blue cloud and red sequence.

Go figure.

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Alien

A moment of silence, please

Takes tinfoil hat off in respect.

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Coat

Lister's washing basket

So that's where it went...

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Alert

lense

maybe the lense needs wiping

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The greenfly conversion has begun...

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