NASA's Mars Rover Opportunity Concludes a 15-Year Mission (nytimes.com)

For more than 14 years, the Opportunity rover crawled up and down craters, snapped pictures of a strange landscape and revealed surprising glimpses into the distant past of Mars. On Wednesday, NASA announced that Opportunity, the longest-lived robot ever sent from Earth to the surface of another planet, is dead. The New York Times: "It is therefore that I am standing here with a deep sense of appreciation and gratitude that I declare the Opportunity mission is complete," said Thomas Zurbuchen, NASA's associate administrator for science. That ends a mission of unexpected endurance: it was designed to last only three months. Opportunity provided scientists a close-up view of Mars that they had never seen: finely layered rocks that preserved ripples of flowing water several billion years ago, a prerequisite for life.

The steady stream of photographs and data from Opportunity -- as well as its twin, Spirit, which survived until 2010 -- also brought Mars closer to people on Earth. Because the rovers continued so much longer than expected, NASA has now had a continuous robotic presence on Mars for more than 15 years. That streak seems likely to continue for many more years. A larger, more capable rover, Curiosity, arrived in 2012, and NASA is planning to launch another in 2020. Live telecast here.

Comments

xkcd

[lazarus]

Obligatory xkcd about its twin: Spirit. We learned a lot from these machines. I hope Matt Damon can one day use one of them to phone home.

Re:xkcd

[necro81]

xkcd already has a new comic in remembrance of Opportunity.

This new one makes me smile wistfully, rather than wanting to cry.

Thus ends an era

[kamakazi]

I have been a space exploration fan since I was a little kid. Don't quite remember the moon landing, since I was only a couple months old. The Spirit/Opportunity pair truly represent the pinnacle of what a dedicated group of creative, well funded scientists and engineers can accomplish.
The extreme resilience and flexibility of the platform, the brilliant schemes the team devised to cope with aging subsystems, and the sheer amount of scientific exploration accomplished on a system with such a small and conservative mission plan.
Definitely my personal favorite technical project of all time. There are milestones in every scientific genre, and this was truly a milestone. The team redefined with very definition of remote mechanical exploration and every rover mankind has sent since has built on the foundation of these two.
I don't mean in any way to diminish the accomplishments of stationary exploration landers like the Vikings, or to demean the early rovers like the Russina Lunokhod rovers (which were truly envelope pushing machines) but the Mars Exploration Rovers demonstrated functional autonomy and extreme robust mechanical miniaturization that really made them the first of their kind.