If it weren't for him, interstellar travel wouldn't have been possible.
We do have interstellar travel, but I cannot believe my race has penetrated to your section of space.
The novel is set around 400 years after humans have achieved interstellar travel.
Interstellar travel is facilitated, and limited, by the use of a technology called the jump drive.
Interstellar travel is already in your reach; there just has never been sufficient economic pressure to force you to obtain it.
Some place there should be the secret of space-travel, interstellar travel.
The aim of the project, announced in January 2012, is to work toward achieving interstellar travel within the next 100 years.
They've put their efforts into medicine, not interstellar travel.
Interstellar travel had proved once and for all that Earth wasn?
Many scientific papers have been published about interstellar travel.
