Artificial colors or not - just being able to see such an image is an affirmation of life. Thank god for technology!
-- ...we are from the government - we are here to help...
Re:black and white?
by
CheshireCatCO
·
· Score: 4, Informative
Oh, no. They really have colors. You get the images from the CCDs in black and white because you have to take one expose through each filter (which is then just a map of intensity at that waveband). But you then add the images to get color.
HST images (as well as other telescopes's outputs) tend to be false colored for two reasons:
1. Because stretching the color tables often brings out subtle details. You can see this is a true and stretched image of Jupiter, for example.
2. Many (most maybe even) HST images include wavelengths that we can't actually see, into the IR and UV. If you want to see those wavelengths, you'll have to false color.
I do sort of wish that they'd always include a little note in the captions stating that the color tables have been stretched or otherwise manipulated. But they seldom do. It's just a dream I have.
Story titles
by
OgdEnigmaX
·
· Score: 3, Insightful
Could we please refrain from plagiarizing titles? Admittedly this is not as bad as ripping article summaries, but still doesn't sit right.
Very neat picture in any case.
Slashdot Mirror
Artificial colors or not - just being able to see such an image is an affirmation of life. Thank god for technology!
...we are from the government - we are here to help...
Oh, no. They really have colors. You get the images from the CCDs in black and white because you have to take one expose through each filter (which is then just a map of intensity at that waveband). But you then add the images to get color.
HST images (as well as other telescopes's outputs) tend to be false colored for two reasons:
1. Because stretching the color tables often brings out subtle details. You can see this is a true and stretched image of Jupiter, for example.
2. Many (most maybe even) HST images include wavelengths that we can't actually see, into the IR and UV. If you want to see those wavelengths, you'll have to false color.
I do sort of wish that they'd always include a little note in the captions stating that the color tables have been stretched or otherwise manipulated. But they seldom do. It's just a dream I have.
Could we please refrain from plagiarizing titles? Admittedly this is not as bad as ripping article summaries, but still doesn't sit right. Very neat picture in any case.
The Fast Facts page says what wavelengths are used in this image. H-alpha and N II are both red, so they probably mapped one of those to green.
It is really a negative of a used condum.
Table-ized A.I.