Only an un-informed amateur would use a system like Google Space to examine such imagery for any serious purpose. As those who do this sort of stuff *know*,
they go back to the original source files, most of which are very freely available to *anyone*, and all of which are available to genuine researchers who need them. The original files are always available, some of the stuff can even be intercepted by radio enthusiasts as they arrive, before the space agencies even get hold of it.. Plus, much of astronomy imaging is done by amateurs..
As for the 'tampering' claims - programs like Google Earth and Space all have to use simplified automated patching/matching and stretching software to overcome perspective problems, and sometimes the operators will intervene and manually edit problematic areas - usually without much care as they KNOW that no researcher worth a dime would ever use these stitched images for serious work. Also, sometimes a camera will catch a passing planet, satellite, aircraft, meteor or comet that obliterates detail, in which case they will block it out so as not to mislead anyone who might folishly think it was part of the background sphere of stars...
Those types of 'tampering' have abosutely nothing to do with hiding anything and most of it is the inevitable result of mapping images that are two dimensional onto a 3d sphere (ie the 360 sphere around your viewing location). If you have had anything to with mapping, you would know about this - if not, look up
Map Projection to understand the issues.
Or if you'd rather laugh,
try this XKCD cartoon (I love xkcd..).
To anyone who wants to claim that things are being deliberately altered, please show your very best example.
But before doing so, I would strongly suggest you go back to the ORIGINAL SOURCE images and look at the entire process - you may find that a simple check or two will reveal the reason for the edit.
Don't know how to do that?
Well, let's just say it will be embarrassing if you make such a claim and others have to show you what you should have done...