These are ACS and NICMOS images of the star cluster NGC 346 and surrounding H II region N66 in the SMC. The only emission line is H alpha (f658n). All the other images are broad-band. ACS images range
Visualization 1 Caption: Time lapse video of antisolar twilight development. Field of View (FOV) of each frame is 118° x 69°. The view is westward over the Pacific Ocean and it was cold and clear at s