https://www.flickr.com/people/nasacommons/

Rights Statement.

There is no clearly posted Rights Statement. Each image has a notice about its Copyright status.

The site includes photographs compiled from the archives at NASA images. The purpose of the site is to encourage the public to add comments and tags to the photographs so they are better documented and more easily accessible. There is no general statement on the copyright status of the images. Each image is labeled as either no being subject to known copyright restrictions or subject to some Creative Commons License.