1.  CONTACT Power, politics and interstellar travel.

2.  He was struck by the science-fiction tinge to discussion of interstellar travel.

3.  I also was surprised to learn that if we could actually discover strings, we might open doors to interstellar travel and perhaps even time travel.

4.  Interstellar travel would require staggering amounts of time, energy and technological know-how.

5.  Interstellar travel?

6.  NASA has come a long way in its thinking about interstellar travel.

7.  Suggestions that others might try to communicate with Earth on that frequency led to extensive speculation about interstellar travel.