منبع: ایسنا
Read More : http://www.nasa.gov/mission_pages/hubble/science/abell68.html
http://hubblesite.org/news/2013/09
http://www.spacetelescope.org/news/heic1304/
http://heritage.stsci.edu/2013/09
http://www.spacetelescope.org/projects/hiddentreasures/