SpaceHero is a 2d game developed using Andengine
All backgrounds of this game were taken from the Hubble Site http://hubblesite.org/
Here are the links for the used images
http://hubblesite.org/gallery/album/nebula/pr2005037b/xlarge_web/
http://hubblesite.org/gallery/album/star/pr2007010a/large_web/
http://hubblesite.org/gallery/album/star/pr2009005a/xlarge_web/
http://hubblesite.org/gallery/album/star/pr2004010c/large_web/
http://hubblesite.org/gallery/album/galaxy/pr2005001a/large_web/
http://hubblesite.org/gallery/album/galaxy/pr2011011a/xlarge_web/
You can see the copyrights for this image here http://hubblesite.org/about_us/copyright.php