Short story about first encounter with aliens
55796
Story about space explorers who communicate but then decide they must destroy each other
6794
Book about aliens arriving in an old country; people capture their spaceship and arrive at alien's planet
23806
Scifi short story with a star in a jar
117123
Sci Fi short story with aliens who only mate every 7 years
791
SF Short Story: alien apes invade during nuclear war
95235
Story about a sentient star system, in a 50s or early 60s anthology
2641
Short story that takes place off planet, involving sun and rain
113857
A mutation-themed short story from the 60s or 70s
99076
Short story (maybe two in the same collection) about Alien education versus Earth
87201
Short story or novel from the 1970s or before about two warring alien tribes
39822
Looking for a short story about the icy end of the world
108653
Six colonists from Terra are kidnapped enroute, and placed on different planet by unknown aliens. Novella 1980's read
61571
Sci Fi short story about an alien invasion where the twist is that the invaders are human?
24552
Short story about an astronaut that enters an alien space ship and discovers it is a sarcophagus
100510
Novel where a group of scientists in a spaceship encounter various aliens
126528
Short story about an endless space ship
28481
Short story, where FTL travel is very simple but humans never discovered it