The original title An approximation to determine the source of the WOW! Signal seems to fit the limit just fine.

From the guidelines.

> Please don't do things to make titles stand out, like using uppercase or exclamation points, or saying how great an article is. It's implicit in submitting something that you think it's important.

&

> Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize.

I could see why the OP wanted to edit it if they were following the submission guidelines. You can make a case to keep the original title as is, but you can also make the case that “WOW! Signal” in the original title sounds like linkbait. So if there’s an error here, it looks like a good faith error in an attempt to follow the guidelines. :)

If you read up on it, that's the actual name of the signal though, exclamation point and all. This isn't some intentional doctoring on OP's behalf to garner clicks.

> Please don't do things to make titles stand out, like using uppercase or exclamation point

This is the "use-mention distinction" https://en.wikipedia.org/wiki/Use%E2%80%93mention_distinctio... as applied to the "!" in "The WOW! signal"

This distinction is more common online when talking about bad speech (e.g. profanity and racism); content filters simply can't tell if you are using a bad word in anger, or just mentioning its use by others; they merely match the presence of the bad word.

IMHO, the "!" should not be removed as the submission is not "doing things" (i.e. using a "!" to pep up the title ), they are mentioning the well-known existing name of the thing.

It isn't actually clickbait and unfortunately, almost everything in the re-written title is wrong - another reason to stick to original titles.

Not saying I disagree, but I can see how someone could read it as such. Good faith effort is good faith effort.

What title was this originally submitted under?

"Sun-like star found in the region of the sky that has most radio signals"

Found using https://hackernewstitles.netlify.app/

I, for one, found the previous title super clear and interesting enough to click further without being clickbait. The new one gives zero information. So thank you for your effort, OP.