Westerlund 2 by the Advanced Camera for Surveys and near-infrared exposures taken by the Wide Field Camera 3.
The Eagle Nebula’s Pillars of Creation in visible light.
A pair of interacting galaxies called Arp 273
The star-forming region NGC 3603
Bubble Nebula, aka NGC 7635. 8,000 ly distant.
Tthe Antennae Galaxies - NGC 4038 and NGC 4039
The Horsehead Nebula aka Barnard 33 in infrared.
NGC 1275 was taken using the Hubble Space Telescope's Advanced Camera for Surveys
10,000 galaxies in the Hubble Ultra Deep Field
The Sombrero Galaxy aka Messier Object 104, M104 or NGC 4594