Spacecraft has Mars InSight
Days away from risky landing
CAPE CANAVERAL, Fla. — Mars is about to get its first U.S. visitor in years: a three-legged, one-armed geologist to dig deep and listen for quakes.
NASA’s InSight makes its grand entrance through the rose-tinted Martian skies on Monday, after a six-month, 300 million-mile (480 million-kilometre) journey. It will be the first American spacecraft to land since the Curiosity rover in 2012 and the first dedicated to exploring underground.
NASA is going with a triedand-true method to get this mechanical miner to the surface of the red planet. Engine firings will slow its final descent and the spacecraft will plop down on its rigid legs, mimicking the landings of earlier successful missions.
That’s where old school ends on this $1 billion U.S.-European effort .
Once flight controllers in California determine the coast is clear at the landing site — fairly flat and rock free — InSight’s six-foot (1.8metre) arm will remove the two main science experiments from the lander’s deck and place them directly on the Martian surface.
No spacecraft has attempted anything like that before.
The firsts don’t stop there. One experiment will attempt to penetrate 16 feet (five metres) into Mars, using a self-hammering nail with heat sensors to gauge the planet’s internal temperature. That would shatter the out-of-this-world depth record of eight feet (21/2 metres) drilled by the Apollo moonwalkers nearly a half-century ago for lunar heat measurements.
The astronauts also left behind instruments to measure moonquakes. InSight carries the first seismometers to monitor for marsquakes — if they exist. Yet another experiment will calculate Mars’ wobble, providing clues about the planet’s core.
It won’t be looking for signs of life, past or present. No life detectors are on board.
The spacecraft is like a self-sufficient robot, said lead scientist Bruce Banerdt of NASA’s Jet Propulsion Laboratory.
“It’s got its own brain. It’s got an arm that can manipulate things around. It can listen with its seismometer. It can feel things with the pressure sensors and the temperature sensors. It pulls its own power out of the sun,” he said.
By scoping out the insides of Mars, scientists could learn how our neighbour — and other rocky worlds, including the Earth and moon — formed and transformed over billions of years. Mars is much less geologically active than Earth, and so its interior is closer to being in its original state — a tantalizing time capsule.
InSight stands to “revolutionize the way we think about the inside of the planet,” said NASA’s science mission chief, Thomas Zurbuchen.
But first, the 800-pound (360-kilogram) vehicle needs to get safely to the Martian surface. This time, there won’t be a ball bouncing down with the spacecraft tucked inside, like there were for the Spirit and Opportunity rovers in 2004. And there won’t be a sky crane to lower the lander like there was for the six-wheeled Curiosity during its dramatic “seven minutes of terror.”
“That was crazy,” acknowledged InSight’s project manager, Tom Hoffman. But he noted, “Any time you’re trying to land on Mars, it’s crazy, frankly. I don’t think there’s a sane way to do it.”
No matter how it’s done, getting to Mars and landing there is hard — and unforgiving.
The mission is designed to last one full Martian year, the equivalent of two Earth years.
With landing day so close to Thanksgiving, many of the flight controllers will be eating turkey at their desks on the holiday.