View Full Version : Why does it curve?

John Kierein
2007-Sep-26, 12:48 PM
If this SOHO Coronagraph is showing debris, why does it curve? What causes this? Is it an instrument artifact or could it be a passing object?


Kaptain K
2007-Sep-26, 02:06 PM
Optical artifact!?

2007-Sep-26, 03:03 PM
Optical artifact!?
That would be my guess too.
And as far as it being curved, I would think that there is some relation to the fact that it is out of focus, and the curvature of the various lenses.

BTW: We need a bit of double post (http://www.bautforum.com/astronomy/65190-why-does-curve.html) cleanup...

2007-Sep-28, 07:13 AM
Maybe you could show some images before and after to set the scene? Unfortunately the WIFI here is not really reliable for downloading the files from SOHO. But it does not look like a solar emission (the curvature is wrong) and basically it looks more like some sort of lense flare, but for that we need to look at the greater context, which we cannot get from 1 image.

2007-Sep-28, 04:27 PM
You are viewing a 3d event in 2 dimensions. It would be an unreal prospective for the apparent width of a debris field to remain so constant - this has to be a viewing artifact.