NASA's Perseverance rover managed to spit out pieces of rock that had been blocking its Mars-sampling gear since late December.
Although the un-choking procedure hadn't been previously tested, the engineers on the Mars mission found it was rather "straightforward," the team said in an earlier blog post (opens in new tab). It involved pointing the drill containing a clogged test tube to the ground and rotating it at speed until the rocks fell out.
The team even managed to capture the moment when the Perseverance rover spat out the pebbles with its Mastcam-Z science camera. The video, shared on Twitter, shows the rover's drill rotating as a small piece of rock comes out onto the red Martian surface.
"In order to keep #SamplingMars, I've emptied my latest partial sample," the team said in the tweet. "Watch closely to see one piece of cored rock drop to the surface in this movie. Thankfully, I can reuse this tube for another sample from the same rock."
The unclogging procedure took place in two steps, with the first part of the stuck sample dislodged on Saturday (Jan. 15) and the rest coming out after some extra effort on Thursday (Jan. 20).
The sampling attempt was the sixth carried out by Perseverance since its landing on Mars in February last year. The rover is building a collection of rock samples that will be brought to Earth in the early 2030s by a Mars sample mission that is being developed jointly by NASA and the European Space Agency.
The engineers realized something was wrong on Dec. 29, when the rover's robotic arm attempted to place the freshly drilled sample into the rover's bit carousel, a rotating wheel-like structure on its chassis that stores the samples. The data revealed resistance when the arm tried to seal the tube with the sample.
The ill-fated sample originated from a rock that scientists call Issole. The team might attempt to drill into this rock once more, the engineers said in the statement.