Explorers - a reprint-anthology edited by Gardner Dozois. "SF Adventures to Far Horizons." Stories from 1951 to 1998 - originally in Top Story Fantasy, Space SF, Astounding, Magazine of F&SF, Analog, Galaxy, Amazing, If, New Worlds, Playboy, TriQuarterly, Isaac Asimov's, Interzone, Science Fiction Age, New Dimensions 1, Universe 12, New Legends.

(Preface by Gardner Dozois)
"The Sentinel" by Arthur C. Clarke
"Moonwalk" by H. B. Fyfe
"Grandpa" by James H. Schmitz
"The Red Hills of Summer" by Edgar Pangborn
"The Longest Voyage" by Poul Anderson
"Hot Planet" by Hal Clement
"Drunkboat" by Cordwainer Smith
"Becalmed in Hell" by Larry Niven
"Nine Hundred Grandmothers" by R. A. Lafferty
"The Keys to December" by Roger Zelazny
"Vaster than Empires and More Slow" by Ursula K. Le Guin
"A Meeting with Medusa" by Arthur C. Clarke
"The Man Who Walked Home" by James Tiptree, Jr.
"Long Shot" by Vernor Vinge
"In the Hall of the Martian Kings" by John Varley
"Ginungagap" by Michael Swanwick
"Exploring Fossil Canyon" by Kim Stanley Robinson
"Promises to Keep" by Jack McDevitt
"Lieserl" by Stephen Baxter
"Crossing Chao Meng Fu" by G. David Nordley
"Wang's Carpets" by Greg Egan
"A Dance to Strange Musics" by Gregory Benford
"Approaching Perimelasma by Geoffrey A. Landis