On Sun, Jan 17, 2016 at 12:48 AM, Tim <xxxxxx@little-possums.net> wrote:

It depends hugely on what you call "possible" proposed technology, and
what resources the launching civilization could devote to it.

What about an Orion drive? E.g. using lasers to implode pellets of fissionable fuel?

Richard Aiken

"Never insult anyone by accident." Robert A. Heinlein

"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville (1843)

"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester

"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confedrate tax collector facing the weapons held by Knight's young children and wife.