[huuu]

Does anyone know why those patterns [1] appear when you zoom in like 10 steps or so? Are those stitches or some artifacts of the sensor?

[1] http://www.spacetelescope.org/images/heic1502a/zoomable/

[MaulingMonkey]

Not sure what patterns you're referring to. Also not sure how big a "step" is - zooming is continuous for me. Might check other browsers (I'm using Chrome)? Or link a screenshot?

[euyyn]

I guess he refers to clicking the + button ten times. I'm using Chrome for Android myself.

[cgriswald]

He may be referring to that, but there doesn't seem to be a per-click zoom amount. It zooms further the longer you hold a click and seems very sensitive.