New Delhi, Oct. 21 -- Five of the world's space agencies joined forces for the five-year mission that will attempt to land a robotic prospector plus a rover on Phobos, the larger and closer of Mars' two pint-sized moons.

The Japan Aerospace Exploration Agency, which is leading the bold sampling effort, launched the spacecraft before dawn from the country's main spaceport on Tanegashima Island. Officials declared success an hour later when the spacecraft separated as planned from the rocket's upper stage. Flight controllers burst into applause and jumped to their feet, shaking hands and embracing.

No one has managed to get samples from Mars or its moons yet

While NASA has successfully landed nine spacecraft on Mars over the past 50 year...