4. Hubble Ultra Deep Field (HUDF) Team

At a very elemental level, what could be cooler than recording the oldest bodies of light at the furthest ends of the universe? "Not much" would be the correct response. The 2012 campaign (UDF12) took place over six weeks from August to September, and was carried out by a number of astronomers under the leadership of Richard Ellis. Among many things that went over our heads—literally and figuratively—the UDF 12 campaign "reveals a previously unseen population of seven faraway galaxies, which are observed as they appeared in a period 350 million to 600 million years after the big bang." Here's to discovery, and our gratitude for photographing things we didn't even know existed.

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Above: UDF12 Campaign, 2012