NASA spacecraft will have company all the way to Mars

CAPE CANAVERAL, Fla. — NASA’s next Mars explorer is going to have company all the way to the red planet: a couple of puny yet groundbreaking sidekicks.

Named after the characters in the 2008 animated movie, the small satellites WALL-E and EVE are hitching a ride on the Atlas V rocket set to launch early this morning morning from California with the Mars InSight lander.

Similar in size to a briefcase or large cereal box, the satellites with pop out from the rocket’s upper stage following liftoff and hightail it to Mars, right behind InSight.

It will be the first time little cube-shaped satellites, CubeSats as they’re known, set sail for deep space. The journey will span 6 1/2 months and 300 million miles.

A brief look at the $18.5 million experiment tagging along with InSight:

MINI SATS

Miniature satellites, or CubeSats, have been piggybacking on big-ticket space missions for well over a decade, providing relatively cheap and fast access to orbit for students and other out-of-the-mainstream experimenters. Until now, the hundreds of CubeSats have been confined to Earth orbit. That’s about to change with NASA’s Mars Cube One project, or MarCO. The European Space Agency, meanwhile, has its CubeSat sights on the moon. A recent competition yielded two winning proposals: a CubeSat to explore the moon’s far side from lunar orbit, another to probe a permanently shadowed crater near the moon’s south pole, also from lunar orbit. NASA is also looking to send CubeSats to the moon, as well as an asteroid.

MOVIE CONNECTION

It turns out these twin cubes are equipped with the same type of cold gas propulsion system used in fire extinguishers to spray foam. The movie WALL-E uses a fire extinguisher to propel through space. Team members couldn’t resist the connection, thus the names WALL-E and EVE for the two mini spacecraft. Engineers want to test this compact propulsion system for guiding the 30-pound cubes to Mars.

GETTING TO MARS

Once free from the rocket’s upper stage following liftoff, WALL-E and EVE will trail a few thousand miles behind InSight en route to Mars. The two mini spacecraft will also be a few thousand miles apart from one another. That’s to prevent any collisions or even close calls. While that may seem far apart, it’s actually fairly close by space standards, according to Brian Clement, an engineer on the project at NASA’s Jet Propulsion Laboratory in Pasadena, Calif. While InSight will be stopping at Mars on Nov. 26, WALL-E and EVE will zoom past the planet from about 2,200 miles out.