This is a bit off-topic, but I'm surprised that the NASA image is listed as CC-BY. I was under the impression that NASA imagery was public domain by default.

Their website [1] says "NASA content [...] generally are not copyrighted." It then goes on to say that "NASA should be acknowledged as the source of the material." IANAL, but I would assume that if the data is not copyrighted, then there's no need to attribute the source, making that "should" pretty toothless.

[1] http://www.nasa.gov/multimedia/guidelines/index.html

Note the "generally" there. Further down it says explicitly "NASA material is not protected by copyright unless noted". In their Flickr page they have selected the CC BY-NC 2.0 license so this works, I think, as a notice of copyright that at the same time grants you a license to use the image (provided you follow the terms of said license).

If it is a work of NASA itself, it shouldn't be subject to copyright. Wikimedia has noticed their assertions:

https://meta.wikimedia.org/wiki/Wikilegal/NASA_images

It's easy to imagine that NASA has more limited rights to reproduce and redistribute images produced by their partners though, and they have lots of partners.

Sorry, it was on my todo list, I'll update them as soon as possible!

Well played, I'd do the same..

Thank you for raising my attention to the missing attribution links, I have added them for both pictures including the correct license type.

You're welcome! It's a small detail but better safe than sorry with these kind of issues.

How did you figure that out?

I recognized the JAXA ship of the bottom image and it amused me for a bit that they chose a pic of a cargo ship instead of an imaging satellite.

Then it was a matter of reverse image search, usually public space images are CC-BY so I figured I should mention that so they don't get into trouble for something easily fixable.