Ever since the Chinese...

what: The Crab Nebula (M-1)

where: 6500 lightyears from Earth
who: an amateur astronomer
more: http://www.space.com/amazingimages/cte.php?guid=45cb840637af24.87530579&cat=s


what: Enigmatic Centaurus A (NGC 5128)

where: 12,5 million lightyears
who: an amateur
more: http://www.space.com/amazingimages/cte.php?guid=45cb7fc551f333.88621358&cat=s


what: The Iris Nebula (NGC 7023)

where: 1400 lightyears
who: an amateur
more: http://www.space.com/amazingimages/cte.php?guid=45cb8367869314.85428165&cat=s