| 100% | TITOV | 5 | Second Russian in space, after Gagarin |
| 50% | CHALLENGER | 10 | Space Shuttle —, orbiter that exploded 73 seconds after lift-off in January, 1986 |
| 50% | CHALLENGER | 10 | Space Shuttle —, orbiter that exploded 73 seconds after lift-off in January 1986 |
| 48% | CHALLENGER | 10 | NASA's space shuttle that broke apart 73 seconds after take off in 1986 |
| 44% | YURI | 4 | First man in space, ___ Gagarin |
| 44% | YURI | 4 | Gagarin in space |
| 44% | YURI | 4 | First human in space, cosmonaut __ Gagarin |
| 42% | MIR | 3 | Russian space station launched in 1986 |
| 41% | SOYUZ | 5 | Russian space program started in the 1960s |
| 41% | MIR | 3 | Russian space station launched in February, 1986 |
| 41% | MIR | 3 | Russian space station launched in February 1986 |
| 41% | YURI | 4 | __ Gagarin, first human in outer space |
| 40% | KIA | 3 | Second-largest carmaker in South Korea, after Hyundai |
| 40% | IRAN | 4 | Second-largest country in Western Asia, after Turkey |
| 40% | YURI | 4 | Gagarin who was the first human in outer space |
| 40% | EMU | 3 | Second-tallest bird in the world, after the ostrich |
| 40% | TIBIA | 5 | Second-longest bone in the body, after the femur |
| 40% | YOUTUBE | 7 | Second-most-visited website in the world, after Google |
| 40% | LIMA | 4 | Second-largest city in South America, after Sao Paulo |
| 40% | TITAN | 5 | Second-largest moon in the solar system, after Ganymede |
| 40% | CONCRETE | 8 | Second-most-used substance in the world, after water |
| 39% | RESNIK | 6 | Second American woman in space |
| 39% | IRAN | 4 | Second-largest country in the Middle East, after Saudi Arabia |
| 39% | REGAL | 5 | Second-largest movie theater chain in the US, after AMC |
| 39% | AMAZON | 6 | Second-largest private employer in the U.S., after Walmart |
| 39% | TIBIA | 5 | Second-largest bone in the human body, after the femur |
| 39% | YOUTUBE | 7 | Second-most visited website in the world, after Google.com |
| 39% | MOSES | 5 | Second-most frequently mentioned individual in the Quran, after Jesus |
| 39% | MIAMI | 5 | Second-most visited city in the US, after New York |
| 39% | YOKOHAMA | 8 | Second largest city in Japan, after Tokyo |