A dying star explodes some 90 million light years away in the spiral galaxy NGC 2770 in front of a serendipituously-pointed lens of a satellite, and turns into supernova SN 2008D. Piece-a-cake!
http://entertainment.timesonline.co.uk/multimedia/archive/00342/news-space1_342431a.jpg
"Supernova 2007uy in the galaxy NGC 2770 pictured on January 7 in ultraviolet image, top, and X-ray close-up, bottom"
http://entertainment.timesonline.co.uk/multimedia/archive/00342/news-space2_342430a.jpg
"Another star pictured on January 9 exploded in the same galaxy providing a unique chance to study a supernova birth"
[ more] http://entertainment.timesonline.co.uk/tol/news/uk/science/article3981607.ece