5  Our sun is one

 7  Captain Kirk series

 8  Music's "a one, and ..."

10 Han Solo's Millennium starship cruiser

13 Drive that gets us--quickly--from here to there

14 United States of Am-----.

15 Hawaiian garland or wreath

16 Frank Herbert wrote this saga

17 Carl Sagan let our minds wander here

19 "Love and Hugs" acronym

20 A spectacle or display of something; a movie

22 Originally or formerly called

23 Either a curandera or medicine man

26 Three, to Caesar

27 Bradbury wrote these Chronicles

28 The central or most important part of something

29 Starship that boldly went where no man had gone before

30 Occupado (English, 2 wds)

 1  Actor Nathan Fillion's starship

 2  The Dispossessed author LeGuin's first name

 3  Madeleine L'Engle's classic novel

 4  What the Borg wanted everyone to do

 5  Wookie movie

 6  Grande, Bravo, Salado, de Janeiro

 9  Space-time shortcut portal

11 Have Space Suit, Will Travel author

12 Douglas Adams wrote this kind of Galaxy Guide

18 From the Earth to here, by Jules Verne

21 Wells wrote about a War between them

24 Generation ship novel by Kim Stanley Robinson

25 Counted on