For the last ten years the missions of the Mars Exploration Rovers, Spirit and Opportunity, have brought breathtaking images of Mars back to Earth.

No question 2012 will be remembered as a simultaneously joyous and tumultuous year, certainly in politics but also in air and space. As a retrospective of the year just gone, here are my five most significant events in air and space. Like all such lists, it is idiosyncratic and I recognize that others might choose different events. I list them in order of their occurrence—not according to their significance—during the year, along with my reason for including them on this list.

In July, I joined a team from Johnson Space Center and elsewhere in investigating the geology of Apollo Valley with rover-deployed scientific instruments. Apollo Valley is a former 1960s Apollo-era astronaut training site at 3,505 meters (11,500 feet) on Mauna Kea, Hawaii. The project was funded by NASA's Moon and Mars Analog Mission Activities Program, which funds projects that simulate scientific, robotic, and human aspects of exploring the Moon and Mars, with the goal of designing the most effective, efficient, and well-integrated future missions. 

“You put an X anyplace in the solar system, and the engineers at NASA can land a spacecraft on it,” so said actor Robert Guillaume in an episode of “Sports Night.” Amen brother, the team that landed Curiosity proved the truth of that statement one more time with the successful landing of a big rover on Mars in the wee morning hours of August 6, 2012! It was a stunning success.

It’s a quarter of a million miles to the Moon, we’ve got fully charged batteries, half a pack of space food, it’s daytime, and we’re wearing spacesuits. Hit it.