One light-year is not much as galactic distances go.

These stars have been used for centuries to determine galactic distances.

"You mean the aboriginals are sending messages at galactic distances?"

Ashbrook was one of the first to study Cepheid variables as tools for establishing galactic distances.

Even so, there were crucial limitations, such as the availability of suitable hosts; the transfer across galactic distances did require significant energy.

He can teleport across galactic distances through the power of his mind and sometimes other dimensions but this ability is limited in scope.

"A man doesn't really realize how great galactic distances are until he gets stuck thirty thousand light-years from home, does he?"

"I'm already beginning to acquire an unpleasant comprehension of the true magnitude of galactic distances."

Astronomers are developing new yardsticks for improving their estimates of galactic distances.

It is merely our most economical means of communication over galactic distances.