The collision of the Russian and American satellites was the first of its kind in over fifty years of space travel.

VOA: special.2009.04.01

There is that sense of space, of expansiveness, the possibility of travel.

这是一种空间感，延伸感，对旅行可能性的感受。

耶鲁公开课 - 1945年后的美国小说课程节选

But seeing Earth from space may soon become a reality for wealthy people who dream of space travel.

VOA: special.2009.12.18

Now he has joined with aviation designer Burt Rutan to form a new space travel company, Virgin Galactic.

VOA: special.2009.12.18

On April fifteenth he gave a speech in which he discussed his goals for space travel.

VOA: special.2010.04.28

Maybe it has to do with the mystery of space travel.

VOA: special.2010.06.27

a vehicle that was popular in science fiction space travel stories.

VOA: special.2009.03.04

He or she makes space travel possible.

VOA: special.2010.06.27

But before NASA could send an astronaut into space, cosmonaut Yuri Gagarin of the Soviet Union became the first person to travel in space.

VOA: special.2009.06.17

Science fiction writer Arthur C.Clarke described an object left on the moon to let aliens know when humans were able to travel in space.

VOA: standard.2010.04.16