They may be the first humans to set foot on another planet.

VOA: special.2009.12.30

In 2001:A Space Odyssey, we get some kind of indication that there's life on another planet.

太空漫游,一些迹象表明,另一个星球上有生命存在

耶鲁公开课 - 死亡课程节选

John Bachar said rock climbing felt like being on another planet.

VOA: special.2009.12.09

"We will use the tremendous capabilities of this ion propulsion system to climb out of orbit around Vesta, travel for almost another three years through the asteroid belt to dwarf planet Ceres and then go into orbit around Ceres and undertake the same kind of measurements there that we'll be doing at Vesta.

VOA: special.2011.07.27

"The bulk of our food production on this planet is dependent to some extent or another on oil or products of oil, so this goes right to the heart of,frankly, the way our society functions,"

VOA: standard.2009.10.20