Thursday, November 23rd, 2017

Crab Nebula II

4

 Crab HaLRGB

I spruced up Mr. Crab with a little color from the same borrowed data acquired by Adam Block (see The Crab Nebula)

I’ve probably mentioned this before, but there really is no “correct” color rendition of deep sky objects. If I were to look through the telescope eyepiece at Mr. Crab, I would probably be disappointed at its drab appearance. I’m tempted to say that it’s all a matter of artistic license, but I don’t want to get in trouble with my artist Bro Tom. So I will just say that since Hydrogen-Alpha emission is in the red end of the spectrum, I’ll color it red, even if human eyes are not all that sensitive to red light. If the telescope image is pretty dim, it would look more green than red. If you want to know more, you can look it up yourself.

Here is what my rather aged friend John Calvin has to say about the heavens:

…the heavens, though without a tongue, are yet eloquent heralds of the glory of God, and that this most beautiful order of nature silently proclaims his admirable wisdom… (Psalm 19.1)

He said it. I believe it.

Dave, card-carrying calvinist.

Comments

4 Responses to “Crab Nebula II”
  1. Tom says:

    Like this one. Green would be fine also. Nice to know my powers to get you to do colored ones. looks like it could go in a medical journal. Maybe for clogged arteries???

  2. Dave says:

    Well, Linda said it looked like an exposed brain. Wonder why it doesn’t look like a crab?

  3. Leslie says:

    Well, it looks more like a crab now…. Why doesn’t it look like a crab with its legs and pincers?
    The whole photo is dazzling. I just love all the surrounding stars!

  4. Dave says:

    Why doesn’t it look like a crab? I dunno. I guess because it isn’t waving its claws around. Thanks for liking the image.

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