by AVAO » Thu Apr 25, 2024 5:19 pm
Chris Peterson wrote: ↑Thu Apr 25, 2024 3:55 pm
It's unclear what mapping was used in either image, or indeed, which filters. As a rule, color images have little scientific value. They are created for press releases and education, not science. So the choice of colors is often aesthetic, or intended to emphasize particular structure. This is particularly true where some or all of the data is completely outside the human visual spectrum, and where more than three filters are used.
Chris' comments are certainly correct.
In addition, simply add the following information:
The filters F090W, F200W, F335M, F444W were used for both images.
In the image of NGC 604, F187N (cyan) and F470N (intense red) were also used,
which is why the inner clouds turn into white-blue and the outer clouds turn into intense red.
In fact, the pictures are not really comparable...
...I love this treasure chest far away...
jac berne (flickr) artistic composit, mixed sources
[quote="Chris Peterson" post_id=338566 time=1714060522 user_id=117706]
[quote="Christian G." post_id=338565 time=1714058394 user_id=147043]
[quote="Chris Peterson" post_id=338564 time=1714056865 user_id=117706]
Where did you find the Tarantula image? (And to me, it looks like both the images you provided are using the same palette.)
[/quote]
I found it here: https://www.nasa.gov/universe/a-cosmic-tarantula-caught-by-nasas-webb/
[/quote]
It's unclear what mapping was used in either image, or indeed, which filters. As a rule, color images have little scientific value. They are created for press releases and education, not science. So the choice of colors is often aesthetic, or intended to emphasize particular structure. This is particularly true where some or all of the data is completely outside the human visual spectrum, and where more than three filters are used.
[/quote]
Chris' comments are certainly correct.
In addition, simply add the following information:
The filters F090W, F200W, F335M, F444W were used for both images.
In the image of NGC 604, F187N (cyan) and F470N (intense red) were also used,
which is why the inner clouds turn into white-blue and the outer clouds turn into intense red.
In fact, the pictures are not really comparable...
...I love this treasure chest far away...
[img2]https://live.staticflickr.com/65535/53257609730_9c2585abd8_b.jpg[/img2]
[size=75]jac berne (flickr) artistic composit, mixed sources [/size]