Curiosity took its first test drive around the gravel-strewn Martian terrain on Wednesday, preparation for the ultimate road trip to find out if life could have existed on the red planet.
The six-wheel NASA rover did not stray far from the spot where it landed more than two weeks ago. It rolled forward about 15 feet, rotated to a right angle and reversed a short distance, leaving track marks on the ancient soil.
Mission managers were ecstatic that the maiden voyage of the $US2.5 billion mission was glitch-free.
"It couldn't be more important," said project manager Peter Theisinger at the NASA Jet Propulsion Laboratory. "We built a rover. So unless the rover roves, we really haven't accomplished anything. It's a big moment."
The short spin came a day after Curiosity successfully wiggled its wheels to test its steering capabilities.
Curiosity landed in Gale Crater near the Martian equator on August 5 to explore whether the environment once supported microbial life. The touchdown site has been named Bradbury Landing in honour of the late The Martian Chronicles author Ray Bradbury, who would have turned 92 on Wednesday.
The rover's ultimate destination is Mount Sharp, a towering mountain that looms from the ancient crater floor. Signs of past water have been spotted at the base, which provides a starting point to hunt for the chemical building blocks of life.
Before Curiosity treks toward the mountain, it will take a detour to an intriguing spot 1300 feet away where it will drill into bedrock. With the test drive out of the way, Curiosity was expected to stay at its new position for several days before making its first big drive — a trip that will take as long as a month and a half.
Curiosity won't head to Mount Sharp until the end of the year.
Rover driver Matt Heverly said the first drive took about 16 minutes with most of the time used to take pictures. Heverly said the wheels did not sink much into the ground, which appeared firm.
"We should have smooth sailing ahead of us," he said.
After an action-packed landing that delicately lowered it to the surface with nylon cables, Curiosity has entered a slow streak. Since the car-size rover is the most sophisticated spacecraft sent to Mars, engineers have taken their time to make sure the rover is in tiptop shape and that its high-tech tools work before it delves into its mission.
Curiosity joins the rover Opportunity, which has been exploring craters in Mars' southern hemisphere since 2004. Opportunity's twin, Spirit, fell silent in 2010 after getting stuck in a sand trap.
Earlier this week, Curiosity exercised its robotic arm for the first time, flexing its joints and motors before engineers stowed it again. Weeks of additional tests were planned before it can drill and scoop up Martian soil.
The nuclear-powered rover has been tracking levels of dangerous radiation on the Martian surface in an effort to guide future astronaut landings. It also powered up its weather station, taking hourly readings of air and ground temperatures, pressure and wind conditions.
Over the weekend, it fired its laser at a humble rock to study what it's made of. Unsurprisingly, the zapped rock was typical of other Martian rocks, made of basalt.
During the checkups, scientists discovered a damaged wind sensor, possibly after it was hit by rocks that landed on the rover's instrument deck during landing. Deputy project scientist Ashwin Vasavada said the broken sensor will not jeopardise the mission since there's a spare.
Since nailing the daredevil landing, the Curiosity team has been acknowledged by President Barack Obama and will receive a visit from Gov Jerry Brown, who declared on Wednesday as "Space Day."
The story Roving rover: Curiosity takes first spin around Mars first appeared on The Sydney Morning Herald.