Which list gives key events regarding the exploration of space in the correct order, beginning with the earliest.

Question

1. first humans in space, first space shuttle flights, first humans on the moon
2. first space shuttle flight, Hubble Space telescope launch, last humans on the moon
3. first humans on the moon, first lander on Mars, first space shuttle flight
4. first humans on the moon, first humans on Mars, launching of the International Space Station

Answer 1

To evaluate the lists provided, we need to order the key events in the exploration of space chronologically:

1. First humans in space: Yuri Gagarin's flight in Vostok 1 on April 12, 1961.
2. First humans on the moon: Apollo 11's landing on the Moon on July 20, 1969.
3. First space shuttle flights: The first space shuttle, Columbia, was launched on April 12, 1981.
4. First lander on Mars: Viking 1 landed on Mars on July 20, 1976.
5. Hubble Space Telescope launch: Launched on April 24, 1990.
6. Last humans on the moon: Apollo 17, the last Apollo moon mission, occurred in December 1972.
7. First humans on Mars: This event has not yet occurred as of October 2023.
8. International Space Station (ISS): The ISS was launched in 1998, with the first module (Zarya) launched on November 20, 1998.

Now, let's assess the lists provided:

1. List 1: first humans in space (1961), first humans on the moon (1969), first space shuttle flights (1981) - Incorrect order.
2. List 2: first space shuttle flight (1981), Hubble Space Telescope launch (1990), last humans on the moon (1972) - Incorrect order.
3. List 3: first humans on the moon (1969), first lander on Mars (1976), first space shuttle flight (1981) - Correct order.
4. List 4: first humans on the moon (1969), first humans on Mars (not yet happened), launching of the International Space Station (1998) - Incorrect order because of the first humans on Mars.

Based on the chronological assessment, List 3 is the only one that presents events in the correct order.